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Hanigan MD, Souza VC, Martineau R, Lapierre H, Feng X, Daley VL. A meta-analysis of the relationship between milk protein production and absorbed amino acids and digested energy in dairy cattle. J Dairy Sci 2024; 107:5587-5615. [PMID: 38490550 DOI: 10.3168/jds.2024-24230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 02/09/2024] [Indexed: 03/17/2024]
Abstract
Milk protein production is the largest draw on AA supplies for lactating dairy cattle. Prior NRC predictions of milk protein production have been absorbed protein (MP)-based and used a first-limiting nutrient concept to integrate the effects of energy and protein, which yielded poor accuracy and precision (root mean squared error [RMSE] >21%). Using a meta-data set gathered, various alternative equation forms considering MP, absorbed total EAA, absorbed individual EAA, and digested energy (DE) supplies as additive drivers of production were evaluated, and all were found to be superior in statistical performance to the first limitation approach (RMSE = 14%-15%). Inclusion of DE intake and a quadratic term for MP or absorbed EAA supplies were found to be necessary to achieve intercept estimates (nonproductive protein use) that were similar to the factorial estimates of the National Academies of Sciences, Engineering, and Medicine (2021). The partial linear slope for MP was found to be 0.409, which is consistent with the observed slope bias of -0.34 g/g when a slope of 0.67 was used for MP efficiency in a first-limiting nutrient system. Replacement of MP with the supplies of individual absorbed EAA expressed in grams per day and a common quadratic across the EAA resulted in unbiased predictions with improved statistical performance as compared with MP-based models. Based on Akaike's information criterion and biological consistency, the best equations included absorbed His, Ile, Lys, Met, Thr, the NEAA, and individual DE intakes from fatty acids, NDF, residual OM, and starch. Several also contained a term for absorbed Leu. These equations generally had RMSE of 14.3% and a concordance correlation of 0.76. Based on the common quadratic and individual linear terms, milk protein response plateaus were predicted at approximately 320 g/d of absorbed His, Ile, and Lys; 395 g/d of absorbed Thr; 550 g/d of absorbed Met; and 70 g/d of absorbed Leu. Therefore, responses to each except Leu are almost linear throughout the normal in vivo range. De-aggregation of the quadratic term and parsing to individual absorbed EAA resulted in nonbiological estimates for several EAA indicating over-parameterization. Expression of the EAA as g/100 g total absorbed EAA or as ratios of DE intake and using linear and quadratic terms for each EAA resulted in similar statistical performance, but the solutions had identifiability problems and several nonbiological parameter estimates. The use of ratios also introduced nonlinearity in the independent variables which violates linear regression assumptions. Further screening of the global model using absorbed EAA expressed as grams per day with a common quadratic using an all-models approach, and exhaustive cross-evaluation indicated the parameter estimates for BW, all 4 DE terms, His, Ile, Lys, Met, and the common quadratic term were stable, whereas estimates for Leu and Thr were known with less certainty. Use of independent and additive terms and a quadratic expression in the equation results in variable efficiencies of conversion. The additivity also provides partial substitution among the nutrients. Both of these prevent establishment of fixed nutrient requirements in support of milk protein production.
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Affiliation(s)
- M D Hanigan
- Department of Dairy Science, Virginia Tech, Blacksburg, VA 24061.
| | - V C Souza
- Department of Dairy Science, Virginia Tech, Blacksburg, VA 24061
| | - R Martineau
- Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada J1M 0C8
| | - H Lapierre
- Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada J1M 0C8
| | - X Feng
- Department of Dairy Science, Virginia Tech, Blacksburg, VA 24061
| | - V L Daley
- Department of Dairy Science, Virginia Tech, Blacksburg, VA 24061
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2
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Cueva SF, Wasson DE, Martins LF, Räisänen SE, Silvestre T, Hristov AN. Lactational performance, ruminal fermentation, and enteric gas emission of dairy cows fed an amylase-enabled corn silage in diets with different starch concentrations. J Dairy Sci 2024; 107:4426-4448. [PMID: 38942561 DOI: 10.3168/jds.2023-23957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 01/05/2024] [Indexed: 06/30/2024]
Abstract
This study investigated the effects of feeding an amylase-enabled corn silage (ACS) on the performance and enteric gas emissions in lactating dairy cows. Following a 2-wk covariate period, 48 mid-lactation Holstein cows were assigned to 1 of 3 treatments in a 10-wk randomized complete block design experiment. Treatments were diets containing the same proportion of corn silage (40% of dietary DM) as follows: (1) a conventional hybrid corn silage control (CON), (2) ACS replacing the control silage (ADR), and (3) the ADR diet replacing soybean hulls with ground corn grain to achieve the same dietary starch concentration as CON (ASR). Control corn silage and ACS were harvested on the same day and contained 40.3% and 37.1% DM and (% of DM): 37.2% and 41.0% NDF and 37.1% and 30.0% starch, respectively. Enteric gas emissions were measured using the GreenFeed system. Two cows were culled due to health-related issues during the covariate period. Ruminal fluid was collected from 24 cows (8 per treatment) using the orogastric ruminal sampling technique. When compared with CON, cows fed ADR had increased DMI during experimental wk 3, 4, and 9, but treatment did not affect milk or ECM milk yields (39.0 kg/d on average; SEM = 0.89). Compared with CON, feed efficiency (per unit of milk, but not ECM) tended to be lower for ADR, whereas milk true protein concentration (a tendency) and yield were lower for ASR. Milk urea N was decreased by both ADR and ASR diets relative to CON. Compared with CON, daily CH4 emission and emission intensity were increased by ADR but not ASR. Total protozoal count tended to be increased by both diets formulated with ACS when compared with control corn silage. Total-tract digestibility of dietary NDF was greater for ASR, and that of ADF was greater for both ADR and ASR versus CON. The molar proportion of acetate (a tendency) and acetate-to-propionate ratio were increased by ADR, but not ASR, when compared with CON. Replacement of CON with ACS (having lower starch concentration) in the diet of dairy cows increased DMI during the initial weeks of the experiment, maintained ECM, tended to decrease feed efficiency, and increased enteric CH4 emissions, likely due to increased intake of digestible fiber, compared with CON.
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Affiliation(s)
- S F Cueva
- Department of Animal Science, The Pennsylvania State University, University Park, PA 16802
| | - D E Wasson
- Department of Animal Science, The Pennsylvania State University, University Park, PA 16802
| | - L F Martins
- Department of Animal Science, The Pennsylvania State University, University Park, PA 16802
| | - S E Räisänen
- Department of Animal Science, The Pennsylvania State University, University Park, PA 16802; ETH Zürich, Department of Environmental Science, Institute of Agricultural Sciences, Zürich 8092, Switzerland
| | - T Silvestre
- Kemin Industries, Singapore 758200, Singapore
| | - A N Hristov
- Department of Animal Science, The Pennsylvania State University, University Park, PA 16802.
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3
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Marques OFC, de Oliveira ER, Gandra JR, Peixoto ELT, Monção FP, de Araújo Gabriel AM, Neves NF, Silva JT, Banys VL, de Lima BM. Dietary replacement of soybean meal with heat-treated grain soybean in diets of feedlot-finished beef cattle: impacts on intake, digestibility, and ruminal parameters. Trop Anim Health Prod 2023; 56:13. [PMID: 38102489 DOI: 10.1007/s11250-023-03862-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 12/07/2023] [Indexed: 12/17/2023]
Abstract
The objective of this study was to assess the impact of increasing levels of heat-treated soybean in the diet of crossbred cattle during the finishing phase on nutrient intake and digestibility, ruminal parameters, digesta passage rate, nitrogen balance, and microbial protein synthesis. Five steers, crossbred 7/8 Jersey x Zebu, fitted with rumen cannulas and with an average weight of 350 ± 50 kg, were utilized. The experimental treatments consisted of 0, 7, 14, 21, and 28% inclusion of heat-treated soybean in the total diet dry matter. The animals were randomly allocated in a 5 × 5 Latin square design. Evaluation of the animals took place over five experimental periods, each lasting 20 days. During each experimental period, the first 15 days were allocated for animal adaptation to the experimental diets, followed by five days of data collection. No significant differences were observed among the diets in terms of dry matter intake (average of 6.57 kg day-1; P = 0.615) and organic matter intake (average of 6.23 kg day-1; P = 0.832). However, heat-treated soybean had a significant impact on the digestibility of dry matter (P = 0.02), organic matter (P = 0.01), crude protein (P < 0.01), and neutral detergent fiber (P < 0.01). There was no observed change on microbial protein synthesis (average of 409.6 g day-1) in animals with the inclusion of heat-treated soybean in the diets. With each 1% inclusion of heat-treated soybean in the cattle diet, there was an increase of 0.00754 units in ruminal pH values and a reduction of 0.75839 mg dL-1 in ruminal ammoniacal nitrogen values. This study suggests that heat-treated soybean can be included in up to 15% of the dry matter in diets for finishing feedlot cattle.
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Affiliation(s)
- Orlando Filipe Costa Marques
- Faculty of Agricultural Sciences, Federal University of Grande Dourados, Rod. Dourados-Itahum, Km 12, Dourados, Mato Grosso Do Sul, Brazil
| | - Euclides Reuter de Oliveira
- Faculty of Agricultural Sciences, Federal University of Grande Dourados, Rod. Dourados-Itahum, Km 12, Dourados, Mato Grosso Do Sul, Brazil
| | - Jefferson Rodrigues Gandra
- Faculty of Veterinary Medicine, Federal University of Sul and Sudeste of Pará, R. Alberto Santos Dumont, Minas Gerais, Xinguara, PA, Brazil
| | - Eduardo Lucas Terra Peixoto
- Faculty of Agricultural Sciences, Federal University of Grande Dourados, Rod. Dourados-Itahum, Km 12, Dourados, Mato Grosso Do Sul, Brazil
| | - Flávio Pinto Monção
- Department of Agricultural Sciences, State University of Montes Claros, Avenue Reinaldo Viana, Janaúba, Minas Gerais, 2630, Brazil.
| | - Andréa Maria de Araújo Gabriel
- Faculty of Agricultural Sciences, Federal University of Grande Dourados, Rod. Dourados-Itahum, Km 12, Dourados, Mato Grosso Do Sul, Brazil
| | - Nathálie Ferreira Neves
- Faculty of Agricultural Sciences, Federal University of Grande Dourados, Rod. Dourados-Itahum, Km 12, Dourados, Mato Grosso Do Sul, Brazil
| | - Janaína Tayna Silva
- Faculty of Agricultural Sciences, Federal University of Grande Dourados, Rod. Dourados-Itahum, Km 12, Dourados, Mato Grosso Do Sul, Brazil
| | - Vera Lúcia Banys
- Department of Agricultural Sciences, Federal University of Jataí, Rua Riachuelo - Setor - Samuel Grahan, Jataí, Goiás, Brazil
| | - Brasilino Moreira de Lima
- Faculty of Agricultural Sciences, Federal University of Grande Dourados, Rod. Dourados-Itahum, Km 12, Dourados, Mato Grosso Do Sul, Brazil
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Vettori JDM, Cavallini D, Giammarco M, Lanzoni L, Vignone O, Jalal H, Mammi L, Pezzi P, Formigoni A, Fusaro I. Parity and nutrient total-tract digestibility in dairy cows during transition period. Vet Anim Sci 2023; 22:100313. [PMID: 37736571 PMCID: PMC10509770 DOI: 10.1016/j.vas.2023.100313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023] Open
Abstract
Cows experience many physiological, nutritional and social changes during transition period. This study aims to evaluate the differences in nutrients total-tract digestibility (nTTD) between primiparous (PP) and multiparous (MP) cows through the transition period. From -23, -5, 0, 7, 14, and 30 days from calving a sample of feed and feces samples were collected from 25 Holstein cows (11 PP and 14 MP) as well as daily rumination time through accelerometers. The results show that average nTTD were different (p ≤ 0.02) for amylase-treated neutral detergent fiber organic matter (aNDFom) and potentially digestible neutral detergent fiber (pdNDF240; 52.5 vs. 54.0 and 78.8 vs. 81.3, respectively in PP vs. MP), while no differences were found regarding pdNDF24 and starch (88.5 vs. 88.6 and 95.1 vs. 96.1, respectively in PP vs. MP). Total-tract starch digestibility (TTstarchD) was different among timepoints (p < 0.01), going from an average of 91.40 up to 97.39% of starch, on times -23 and 14, respectively. Differences in total-tract digestibility of aNDFom among timepoints (p < 0.01) was expected because of differences in diet composition among lactating and non-lactating cows. No differences in daily rumination time (p = 0.92), TTstarchD and total-tract potentially digestible NDF digestibility at 24 h (TTpdNDF24D) were recorded. Our findings show that fiber digestibility during the transition period is higher in MP probably for a different ruminal retention time. These differences should be considered when formulating rations for groups with different parity number.
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Affiliation(s)
- Julio de M. Vettori
- Dipartimento di Scienze Mediche Veterinarie, University of Teramo, Teramo, Italy
| | - Damiano Cavallini
- Dipartimento di Scienze Mediche Veterinarie, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Melania Giammarco
- Dipartimento di Scienze Mediche Veterinarie, University of Teramo, Teramo, Italy
| | - Lydia Lanzoni
- Dipartimento di Scienze Mediche Veterinarie, University of Teramo, Teramo, Italy
| | - Oreste Vignone
- Dipartimento di Scienze Mediche Veterinarie, University of Teramo, Teramo, Italy
| | - Hassan Jalal
- Dipartimento di Scienze Mediche Veterinarie, University of Teramo, Teramo, Italy
| | - Ludovica Mammi
- Dipartimento di Scienze Mediche Veterinarie, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Paolo Pezzi
- Dipartimento di Scienze Mediche Veterinarie, University of Teramo, Teramo, Italy
| | - Andrea Formigoni
- Dipartimento di Scienze Mediche Veterinarie, Alma Mater Studiorum University of Bologna, Bologna, Italy
| | - Isa Fusaro
- Dipartimento di Scienze Mediche Veterinarie, University of Teramo, Teramo, Italy
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Krogstad KC, Bradford BJ. The effects of feeding α-amylase-enhanced corn silage with different dietary starch concentrations to lactating dairy cows on milk production, nutrient digestibility, and blood metabolites. J Dairy Sci 2023; 106:4666-4681. [PMID: 37268561 DOI: 10.3168/jds.2022-23030] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 02/04/2023] [Indexed: 06/04/2023]
Abstract
Corn silage is one of the most common ingredients fed to dairy cattle. Advancement of corn silage genetics has improved nutrient digestibility and dairy cow lactation performance in the past. A corn silage hybrid with enhanced endogenous α-amylase activity (Enogen, Syngenta Seeds LLC) may improve milk production efficiency and nutrient digestibility when fed to lactating dairy cows. Furthermore, evaluating how Enogen silage interacts with different dietary starch content is important because the ruminal environment is influenced by the amount of rumen fermentable organic matter consumed. To evaluate the effects of Enogen corn silage and dietary starch content, we conducted an 8-wk randomized complete block experiment (2-wk covariate period, 6-wk experimental period) with a 2 × 2 factorial treatment arrangement using 44 cows (n = 11/treatment; 28 multiparous, 16 primiparous; 151 ± 42 d in milk; 668 ± 63.6 kg of body weight). Treatment factors were Enogen corn silage (ENO) or control (CON) corn silage included at 40% of diet dry matter and 25% (LO) or 30% (HI) dietary starch. Corn silage used in CON treatment was a similar hybrid as in ENO but without enhanced α-amylase activity. The experimental period began 41 d after silage harvest. Feed intake and milk yield data were collected daily, plasma metabolites and fecal pH were measured weekly, and digestibility was measured during the first and final weeks of the experimental period. Data were analyzed using a linear mixed model approach with repeated measures for all variables except for body condition score change and body weight change. Corn silage, starch, week, and their interactions were included as fixed effects; baseline covariates and their interactions with corn silage and starch were also tested. Block and cow served as the random effects. Plasma glucose, insulin, haptoglobin, and serum amyloid A concentrations were unaffected by treatment. Fecal pH was greater for cows fed ENO versus CON. Dry matter, crude protein, neutral detergent fiber, and starch digestibility were all greater for ENO than CON during wk 1, but differences were less by wk 6. The HI treatments depressed neutral detergent fiber digestibility compared with LO. Dry matter intake (DMI) was not affected by corn silage but was affected by the interaction of starch and week; in wk 1, DMI was similar but by wk 6, cows fed HI had 1.8 ± 0.93 kg/d less DMI than LO cows. Milk, energy-corrected milk, and milk protein yields were 1.7 ± 0.94 kg/d, 1.3 ± 0.70 kg/d, and 65 ± 27 g/d greater for HI than LO, respectively. In conclusion, ENO increased digestibility but it did not affect milk yield, component yields, or DMI. Increasing dietary starch content improved milk production and feed efficiency without affecting markers of inflammation or metabolism.
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Affiliation(s)
- K C Krogstad
- Department of Animal Science, Michigan State University, East Lansing, MI 48824
| | - B J Bradford
- Department of Animal Science, Michigan State University, East Lansing, MI 48824.
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6
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Cueva SF, Harper M, Roth GW, Wells H, Canale C, Gallo A, Masoero F, Hristov AN. Effects of ensiling time on corn silage starch ruminal degradability evaluated in situ or in vitro. J Dairy Sci 2023; 106:3961-3974. [PMID: 37105872 DOI: 10.3168/jds.2022-22817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 12/30/2022] [Indexed: 04/29/2023]
Abstract
Accurate measurements of concentration and ruminal degradability of corn silage starch is necessary for formulation of diets that meet the energy requirements of dairy cows. Five corn silage hybrids ensiled for 0 (unfermented), 30, 60, 120, and 150 d were used to determine the effects of ensiling time on starch degradability of corn silage. In addition, the effects of grind size of silage samples on 7-h in vitro starch degradability and the relationship between in vitro, in situ and near-infrared reflectance spectroscopy (NIRS) starch degradability were studied. In situ disappearance of corn silage starch increased from 0 to 150 d of ensiling, primarily as a result of an increase in the washout or rapidly degraded fraction of starch, particularly during the first 60 d of ensiling. When analyzed in vitro and by NIRS, ensiling time increased corn silage starch degradability either linearly or to a greater extent during the first 2 mo of ensiling. Differences in in situ starch disappearance among corn silage hybrids were apparent during the first 2 mo of ensiling but were attenuated as silages aged. No differences among hybrids were detected using a 7-h in vitro starch digestibility approach. Results from the in vitro subexperiment indicate that 7-h in vitro starch degradability was increased by reducing grind size of corn silage from 4 to 1 mm, regardless of ensiling duration. Fine grinding corn silages samples (i.e., 1-mm sieve) allowed distinguishing low- from medium- and high-starch degradability rated hybrids. Correlations among in situ, in vitro and NIRS measurements for starch degradability were medium to high (r ≥0.57); however, agreement among methods was low (concordance correlation coefficient ≤0.15). In conclusion, ensiling time linearly increased degradation rate of corn silage resulting in greater in situ starch disappearance after 150 d of ensiling. Reductions in grind size from 4 to 1 mm resulted in greater in vitro starch degradability, regardless of ensiling duration. Strong correlation but low agreement between starch degradability methods suggest that absolute estimations of corn silage starch degradability will vary, but all methods can be used to assess the effect of ensiling time on starch degradability.
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Affiliation(s)
- S F Cueva
- Department of Animal Science, The Pennsylvania State University, University Park 16802
| | - M Harper
- Department of Animal Science, The Pennsylvania State University, University Park 16802
| | - G W Roth
- Department of Plant Science, The Pennsylvania State University, University Park 16802
| | - H Wells
- Cargill Animal Nutrition, Shippensburg, PA 17257
| | - C Canale
- Cargill Animal Nutrition, Shippensburg, PA 17257
| | - A Gallo
- Department of Animal Science, Food and Nutrition, Facoltà di Scienze Agrarie, Alimentari e Ambientali, Università Cattolica del Sacro Cuore, Piacenza, Italy 29100
| | - F Masoero
- Department of Animal Science, Food and Nutrition, Facoltà di Scienze Agrarie, Alimentari e Ambientali, Università Cattolica del Sacro Cuore, Piacenza, Italy 29100
| | - A N Hristov
- Department of Animal Science, The Pennsylvania State University, University Park 16802.
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Oliveira LN, Pereira MAN, Oliveira CDS, Oliveira CC, Silva RB, Pereira RAN, DeVries TJ, Pereira MN. Effect of low dietary concentrations of Acacia mearnsii tannin extract on chewing, ruminal fermentation, digestibility, nitrogen partition, and performance of dairy cows. J Dairy Sci 2023; 106:3203-3216. [PMID: 37028971 DOI: 10.3168/jds.2022-22521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 12/14/2022] [Indexed: 04/08/2023]
Abstract
The supplementation of dairy cows with tannins can reduce the ruminal degradation of dietary protein and urine N excretion, but high concentration in the diet can impair ruminal function, diet digestibility, feed intake, and milk yield. This study evaluated the effect of low concentrations (0, 0.14, 0.29, or 0.43% of diet in DM basis) of a tannin extract from the bark of Acacia mearnsii (TA) on milking performance, dry matter intake (DMI), digestibility, chewing behavior, ruminal fermentation, and N partition of dairy cows. Twenty Holstein cows (34.7 ± 4.8 kg/d, 590 ± 89 kg, and 78 ± 33 d in lactation) were individually fed a sequence of 4 treatments in 5, 4 × 4 Latin squares (with 21-d treatment periods, each with a 14-d adaptation period). The TA replaced citrus pulp in the total mixed ration and other feed ingredients were kept constant. Diets had 17.1% crude protein, mostly from soybean meal and alfalfa haylage. The TA had no detected effect on DMI (22.1 kg/d), milk yield (33.5 kg/d), and milk components. The proportions in milk fat of mixed origin fatty acids (16C and 17C) and the daily secretion of unsaturated fatty acids were linearly reduced and the proportion of de novo fatty acids was increased by TA. Cows fed TA had linear increase in the molar proportion of butyrate and linear reduction in propionate in ruminal fluid, whereas acetate did not differ. There was a tendency for the ratio of acetate to propionate to be linearly increased by TA. Cows fed TA had a linear reduction in the relative ruminal microbial yield, estimated by the concentrations of allantoin and creatinine in urine and body weight. The total-tract apparent digestibility of neutral detergent fiber, starch, and crude protein also did not differ. The TA induced a linear increase in meal size and duration of the first daily meal and reduced meal frequency. Rumination behavior did not differ with treatment. Cows fed 0.43% TA selected against feed particles >19 mm in the morning. There were tendencies for linear decreases in milk urea N (16.1-17.3 mg/dL), urine N (153-168 g/d and 25.5-28.7% of N intake), and plasma urea N at 6, 18, and 21 h postmorning feeding, and plasma urea N 12 h postfeeding was reduced by TA. The proportion of N intake in milk (27.1%) and feces (21.4%) did not differ with treatment. Reductions in urine N excretion and milk and plasma urea N suggest that TA reduced ruminal AA deamination, whereas lactation performance did not differ. Overall, TA up to 0.43% of DM did not affect DMI and lactation performance, while there was a tendency to reduce urine N excretion.
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Affiliation(s)
- Liniker N Oliveira
- Departamento de Zootecnia, Universidade Federal de Lavras, Lavras, MG 37200-900, Brazil
| | | | - Cecília D S Oliveira
- Departamento de Zootecnia, Universidade Federal de Lavras, Lavras, MG 37200-900, Brazil
| | - Cássia C Oliveira
- Departamento de Zootecnia, Universidade Federal de Lavras, Lavras, MG 37200-900, Brazil
| | - Rayana B Silva
- Better Nature Research Center, Lavras, MG 37203-016, Brazil
| | - Renata A N Pereira
- Empresa de Pesquisa Agropecuária de Minas Gerais, Lavras, MG 37200-970, Brazil
| | - Trevor J DeVries
- Department of Animal Biosciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Marcos N Pereira
- Departamento de Zootecnia, Universidade Federal de Lavras, Lavras, MG 37200-900, Brazil.
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Oba M, Kammes-Main K. Symposium review: Effects of carbohydrate digestion on feed intake and fuel supply. J Dairy Sci 2023; 106:2153-2160. [PMID: 36357209 DOI: 10.3168/jds.2022-22420] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/11/2022] [Indexed: 11/09/2022]
Abstract
Carbohydrates are the primary energy source for lactating dairy cows, and dairy diets are usually formulated for certain concentrations of forage neutral detergent fiber (NDF) and starch due to their direct effects on dry matter intake and milk production. Forage NDF exerts greater filling effects in the rumen than other dietary components and can limit maximum voluntary feed intake of lactating dairy cows. Since an analytical method for NDF was developed more than a half century ago, it has been used widely to characterize forages and diets for dairy cows. However, because NDF is a chemical measurement varying in its digestibility, in vitro digestibility measurements were developed as a biological approach to assess forage quality. Research efforts over the last several decades led to the development of forage cultivars or hybrids with enhanced in vitro NDF digestibility, such as brown midrib, and management practices considering differences in NDF digestibility of forages. In addition, in vitro NDF digestibility and undigested NDF are commonly measured in commercial labs, and estimated rates of digestion are used in dynamic models in an effort to improve the accuracy and precision of diet formulation. Starch digestion in the rumen also varies among starch sources, being affected by grain type, extent of processing, and conservation method. The site and rate of starch digestion affect dry matter intake and nutrient partitioning in dairy cows by modifying temporal supply of fuel. In addition, dietary starch content and its fermentability can affect digestion rates of starch itself and NDF in the rumen. Previous research has increased our understanding of dietary carbohydrates, but its application for diet formulations requires integrated approaches accounting for factors affecting the filling effects of forage NDF, starch digestion, and temporal fuel supply.
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Affiliation(s)
- M Oba
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada T6G 2P5.
| | - K Kammes-Main
- Department of Animal Science, Michigan State University, East Lansing 48824
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Gordiano L, Ferreira F, Ribeiro CDM, de Carvalho G, Silva F, de Araújo M, Alba H, e Silva R, Azevedo J, Freitas Jr JED. Association between chitosan and unsaturated fatty acids supplementation on ruminal fermentation, digestive metabolism, and ruminal kinetics in beef heifers. Livest Sci 2023. [DOI: 10.1016/j.livsci.2023.105216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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10
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Silva WR, Carvalho FR, Silva RB, Pereira RA, Ávila CL, DeVries TJ, Pereira MN. Fibrous coproducts of corn and citrus as forage and concentrate sources for dairy cows. J Dairy Sci 2022; 105:8099-8114. [DOI: 10.3168/jds.2022-21918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 06/10/2022] [Indexed: 11/19/2022]
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Brant LM, de Freitas Júnior JE, Pereira FM, Pina DDS, Santos SA, Leite LC, Becker CA, Matos SDC, de Araújo ML, Alba HD, Cirne LG, de Carvalho GG. Crude glycerin and cottonseed cake replacing common energy and protein sources on the metabolism of feedlot lambs. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Dondé S, Cezar A, de Toledo A, Coelho M, Tomaluski C, Reis M, Silva A, Silva M, Virgínio Jr G, Bittar C. Replacement of dry ground corn with reconstituted corn grain
silage in the starter concentrate of dairy calves. JOURNAL OF ANIMAL AND FEED SCIENCES 2022. [DOI: 10.22358/jafs/147655/2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Zanton G, Hall M. Substitution of molasses for corn grain at two levels of degradable protein. II. Effects on ruminal fermentation, digestion, and nitrogen metabolism. J Dairy Sci 2022; 105:3954-3968. [DOI: 10.3168/jds.2021-21240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/20/2021] [Indexed: 11/19/2022]
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14
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Intake, digestibility, water balance, ruminal dynamics, and blood parameters in sheep fed diets containing extra-fat whole corn germ. Anim Feed Sci Technol 2022. [DOI: 10.1016/j.anifeedsci.2022.115248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Fernandes T, da Silva KT, Carvalho BF, Schwan RF, Pereira RAN, Pereira MN, da Silva Ávila CL. Effect of amylases and storage length on losses, nutritional value, fermentation, and microbiology of silages of corn and sorghum kernels. Anim Feed Sci Technol 2022. [DOI: 10.1016/j.anifeedsci.2022.115227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Milk production, rumen function, and digestion in dairy cows fed diets differing in predominant forage and concentrate type. Anim Feed Sci Technol 2021. [DOI: 10.1016/j.anifeedsci.2021.115151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Meta-analysis of the effects of silage additives on high-moisture grain silage quality and performance of dairy cows. Livest Sci 2021. [DOI: 10.1016/j.livsci.2021.104618] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Allen MS, Ying Y. Effects of corn grain endosperm type and conservation method on site of digestion, ruminal digestion kinetics, and flow of nitrogen fractions to the duodenum in lactating dairy cows. J Dairy Sci 2021; 104:7617-7629. [DOI: 10.3168/jds.2020-18882] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 03/12/2021] [Indexed: 01/26/2023]
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19
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Allen MS, Longuski RA, Ying Y. Effects of corn grain endosperm type and fineness of grind on site of digestion, ruminal digestion kinetics, and flow of nitrogen fractions to the duodenum in lactating dairy cows. J Dairy Sci 2021; 104:7641-7652. [DOI: 10.3168/jds.2020-18992] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 08/26/2020] [Indexed: 11/19/2022]
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20
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Allen MS, Ying Y. Effects of corn grain endosperm type and conservation method on feed intake, feeding behavior, and productive performance of lactating dairy cows. J Dairy Sci 2021; 104:7604-7616. [PMID: 33865600 DOI: 10.3168/jds.2020-18881] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 03/12/2021] [Indexed: 11/19/2022]
Abstract
Our objective was to evaluate the effects of corn grain varying in endosperm type and conserved as high-moisture or dry ground corn on dry matter intake (DMI), feeding behavior, ruminal fermentation, and yields of milk and milk components of cows in early to mid-lactation. Seven ruminally and duodenally cannulated Holstein cows (73 ± 39 d in milk; mean ± SD) were used in a duplicated 4 × 4 Latin square design with 21-d periods. A 2 × 2 factorial arrangement of treatments was used with main effects of corn grain endosperm type (floury or vitreous) conserved as high-moisture corn (HMC) or dry ground corn (DGC). Rations were formulated to contain 27.0% starch, 26.6% neutral detergent fiber (NDF), 19.1% forage NDF, and 16.5% crude protein. Corn grain treatments supplied 86.6% of dietary starch and contained alfalfa silage as the sole forage. Dry matter intake was increased 1.3 kg/d by DGC compared with HMC. The increase in DMI by DGC was related to a shorter intermeal interval (104.4 vs. 118.2 min/d), and meal size was not affected by treatment. Dry ground corn decreased rumination bout length and number of chews per bout compared with HMC. No differences were detected between endosperm treatments for DMI, yields of milk, 3.5% fat-corrected milk (FCM), milk fat, protein, lactose, or solids-not-fat (SNF). Mean yield of 3.5% FCM across treatments was 47.5 kg/d. However, a tendency for an interaction was observed for feed efficiency; floury endosperm increased efficiency 0.05 kg 3.5% FCM per kg of DMI for DGC but decreased it by 0.14 kg 3.5% FCM per kg of DMI for HMC relative to vitreous endosperm. Vitreous compared with floury corn tended to increase true protein concentration in milk when conserved as DGC (2.68% vs. 2.62%) but not as HMC. Concentration of SNF was increased by DGC compared with HMC (8.45 vs. 8.37%) due, in part, to the effect of treatment on milk protein concentration. Body weight was not affected by treatment, but vitreous endosperm tended to increase loss of body condition compared with floury endosperm. Corn endosperm type and conservation method had little effect on productive performance of high-producing cows.
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Affiliation(s)
- Michael S Allen
- Department of Animal Science, Michigan State University, East Lansing 48824.
| | - Yun Ying
- Department of Animal Science, Michigan State University, East Lansing 48824
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21
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Brant LMS, de Carvalho GGP, Pina DDS, de Araújo MLGML, Santos SA, Leite LC, Alba HDR, Bulcão LFDA, da Silva LO, de Freitas Júnior JE. Estimation of ruminal outflow in buffaloes fed diets with different energy and protein sources by use of reticular and omasal sampling. Trop Anim Health Prod 2021; 53:201. [PMID: 33687567 DOI: 10.1007/s11250-021-02630-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 02/21/2021] [Indexed: 11/28/2022]
Abstract
This study aimed to evaluate the effects of different traditional or alternative energy and protein sources, associated or not, on feeding behavior, ruminal kinetics, and post-ruminal flow of nutrients. Besides, it was assessed diets' effects on different sites (reticulum and omasum) of buffaloes. Four ruminally cannulated male Murrah buffaloes (average initial weight of 637 ± 66.37 kg) were randomly distributed in a 4 × 4 Latin square design. Treatments were arranged as 2 × 2 factorial arrangement. The first factor evaluated was the inclusion of energy sources (ground corn and crude glycerin), and the second factor was the inclusion of protein sources (soybean meal and cottonseed cake). Buffaloes fed cottonseed cake had a higher content of neutral detergent fiber (NDF) and potentially digestible detergent fiber (pdNDF) in the rumen environment than buffaloes fed soybean meal. There was a sampling site effect on rumen digestion rates of pdNDF, passage rates of indigestible neutral detergent fiber (iNDF), and pdNDF, and flow of iNDF. In this study, omasal collections were more representative. Total replacement of ground corn by crude glycerin promoted less NDF ruminal digestibility, and care should be taken to include this energy source. The cottonseed cake does not cause a difference in rumen dynamics and can totally replace soybean meal in feedlot buffaloes' diet.
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Affiliation(s)
- Lara Maria Santos Brant
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, BA, 40.170-110, Brazil
| | - Gleidson Giordano Pinto de Carvalho
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, BA, 40.170-110, Brazil
| | - Douglas Dos Santos Pina
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, BA, 40.170-110, Brazil
| | | | - Stefanie Alvarenga Santos
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, BA, 40.170-110, Brazil
| | - Laudi Cunha Leite
- Department of Animal Science, Federal University of Recôncavo da Bahia (UFRB), Cruz das Almas, Bahia, 44.380-000, Brazil
| | - Henry Daniel Ruiz Alba
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, BA, 40.170-110, Brazil
| | - Lucas Fialho de Aragão Bulcão
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, BA, 40.170-110, Brazil
| | - Liliane Oliveira da Silva
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, BA, 40.170-110, Brazil
| | - José Esler de Freitas Júnior
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, BA, 40.170-110, Brazil.
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22
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Hanlon ME, Moorby JM, McConochie HR, Foskolos A. Effects of addition of nutritionally improved straw in dairy cow diets at 2 starch levels. J Dairy Sci 2020; 103:10233-10244. [PMID: 32921469 DOI: 10.3168/jds.2020-18360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 07/04/2020] [Indexed: 11/19/2022]
Abstract
The objective of this experiment was to explore the effects of different dietary neutral detergent fiber sources within diets of high-producing dairy cattle with low or high starch concentrations on milk yield and composition, dry matter intake (DMI), total-tract digestibility, nitrogen (N) partitioning, and rumen function and health. Holstein-Friesian cows in early- to mid-lactation (n = 12; 666 ± 67 kg of body weight at the start of the experiment) and dry cannulated Holstein-Frisian cows (n = 4; 878 ± 67 kg of body weight at the start of the experiment) were used in multiple 4 × 4 Latin square design experiment and were offered 4 different diets. The treatments were 50:50 forage-to-concentrate diets within a total mixed ration (TMR) consisting, on a dry matter (DM) basis, of 42.4% grass silage as the main forage, 7.6% chopped untreated wheat straw, or sodium hydroxide (NaOH) wheat straw pellets, known as nutritionally improved straw (NIS), and 50.0% of 1 of 2 different concentrates with low or high starch level (TMR starch level of 16.0 vs. 24.0% of DM, respectively). Four experimental periods were used, each consisting of a 21-d adaptation period and 7 d of sampling. Dry matter intake and milk yield were both affected by the type of straw included in the diet. A 1.6 kg/d higher DMI was seen when NIS was fed compared with untreated straw, resulting in a 1.7 kg/d higher milk yield. Milk protein concentration was affected by straw type and starch level, and it was 4 and 3% higher when NIS and high-starch diets were fed, respectively. Diets with NIS were more positively effective when fed with low levels of starch. These results illustrate that feeding NIS to high-producing lactating dairy cows fed low or high starch concentrations has a positive effect on performance.
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Affiliation(s)
- M E Hanlon
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, SY23 3EE, United Kingdom; Department of Animal Sciences, University of Thessaly, Larisa, 411 10, Greece
| | - J M Moorby
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, SY23 3EE, United Kingdom
| | - H R McConochie
- Wynnstay Group Plc, Llansantffraid, SY22 6AQ, United Kingdom
| | - A Foskolos
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, SY23 3EE, United Kingdom; Department of Animal Sciences, University of Thessaly, Larisa, 411 10, Greece.
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23
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Silva BDC, Pacheco MVC, Godoi LA, Alhadas HM, Pereira JMV, Rennó LN, Detmann E, Paulino PVR, Schoonmaker JP, Valadares Filho SDC. Reconstituted and ensiled corn or sorghum grain: Impacts on dietary nitrogen fractions, intake, and digestion sites in young Nellore bulls. PLoS One 2020; 15:e0237381. [PMID: 32764802 PMCID: PMC7413414 DOI: 10.1371/journal.pone.0237381] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 07/24/2020] [Indexed: 11/27/2022] Open
Abstract
Two experiments were conducted: (1) to evaluate the effect of ensiling time and grain source on dietary nitrogen fractions; and (2) to verify the influence of concentrate level, processing method and grain source on intake, microbial efficiency, and digestibility by young Nellore bulls. In Experiment 1, corn and sorghum grains were milled, reconstituted to 35% moisture, and ensiled in a bag silo for 10 different times. There were three replications per ensiling time and grain source. Samples from each replication were analyzed in triplicate for total nitrogen (N), non-protein nitrogen (NPN), soluble N, insoluble N, and neutral detergent insoluble nitrogen (NDIN). In Experiment 2, five Nellore bulls were used in a 5 × 5 Latin square design. Four diets were comprised of 28.4% corn silage, 10.7% supplement, and 60.9% dry ground corn, dry ground sorghum, reconstituted and ensiled corn, or reconstituted and ensiled ground sorghum. An additional diet comprised of 45% corn silage, 10.7% supplement, and 44.3% dry ground corn (Roughage+) was used. Each experimental period lasted 22 days, with an adaptation period of 14 days followed by 5 days of total feces and urine collection and 3 days of collecting omasal samples. Data were analyzed using the MIXED procedure of SAS 9.4. The reconstitution and ensiling process reduced (P < 0.05) the insoluble N fraction, increased (P < 0.05) non-protein nitrogen of corn and sorghum grains, tended (P = 0.052) to increase microbial efficiency, and increased (P < 0.05) intestinal and total digestion of dry matter (DM), organic matter (OM), crude protein (CP), and starch. The concentrate level affected neither (P > 0.05) DM intake nor rumen pH. On the other hand, bulls fed diets based on 72% concentrate showed greater (P < 0.05) DM, OM, and CP digestibility compared with those fed a diet based on 55% concentrate. In addition, animals fed diets based on corn grains (both reconstituted and ensiled or dry) presented greater (P < 0.05) intestinal and total starch digestion compared to those fed sorghum grain. Therefore, the reconstitution process can reduce the insoluble N fraction and increase nutrient availability.
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Affiliation(s)
- Breno de Castro Silva
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- * E-mail:
| | | | - Letícia Artuzo Godoi
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | | | | | - Luciana Navajas Rennó
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Edenio Detmann
- Department of Animal Science, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | | | - Jon Patrick Schoonmaker
- Department of Animal Sciences, Creighton Hall of Animal Sciences, Purdue University, West Lafayette, Indiana, United States of America
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Estimation of between-Cow Variability in Nutrient Digestion of Lactating Dairy Cows Fed Corn-Based Diets. Animals (Basel) 2020; 10:ani10081363. [PMID: 32781738 PMCID: PMC7460325 DOI: 10.3390/ani10081363] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/01/2020] [Accepted: 08/04/2020] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Cow variability present in nutrient digestibility studies differs for different diets and nutrients. It is a major factor determining adequate sample size so that studies are not under-powered or over-powered. The objective of the current study was to develop cow variability estimates that can be used to determine the optimal sample size for digestibility trials having randomized block designs using mid-lactation dairy cows when fed corn-based diets having different neutral detergent fiber:starch ratio (0.7, 1.0, and 1.3). Cow variability is greater for digestibility of fiber and dry matter and less for starch. Estimated cow variability as standard deviations for digestibility of dry matter, neutral detergent fiber and starch were 3.8 g/kg, 5.1 g/kg and 3.3 g/kg, respectively. A major implication of this study is that cow variability is greatest for fiber digestibility and the use of a minimum of 12 cows per dietary treatment is adequate to reliably detect treatment effects on the digestibility of fiber, starch and dry matter using lactating dairy cows fed in groups with randomized block design under current experimental conditions. Abstract The objective of this study was to estimate cow variability that can be used to determine the optimal sample size for digestibility trials using lactating dairy cows. Experimental design was randomized complete block design having three blocks and three dietary treatments. Three similarly managed nearby intensive farms were considered as blocks, and three diets were formulated to have 0.7, 1.0, and 1.3 neutral detergent fiber (NDF): starch ratio. In each farm, 18 cows were assigned for each dietary treatment and five sample sizes per each treatment group were simulated by simple random sampling of data from 18, 15, 12, 9 and 6 cows respectively. Intake was not affected by diet or sample size (p > 0.05). Estimated cow variability (as standard deviation) for digestibility of dry matter, NDF and starch were 3.8 g/kg, 5.1 g/kg and 3.3 g/kg, respectively. A major implication of this study is that cow variability is greatest for NDF digestibility and the use of a minimum of 12 cows per dietary treatment is adequate to reliably detect treatment effects on the digestibility of NDF, starch and dry matter using cows fed in groups with randomized block design under these experimental conditions.
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25
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Chibisa GE, Beauchemin KA, Koenig KM, Penner GB. Optimum roughage proportion in barley-based feedlot cattle diets: total tract nutrient digestibility, rumination, ruminal acidosis, short-chain fatty absorption, and gastrointestinal tract barrier function. J Anim Sci 2020; 98:skaa160. [PMID: 32447367 PMCID: PMC7447917 DOI: 10.1093/jas/skaa160] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 05/19/2020] [Indexed: 12/22/2022] Open
Abstract
Cattle need physically effective fiber to promote rumination and maintain rumen health, but economics favor the use of low-roughage feedlot diets. The study investigated the optimum barley silage proportion in barley-based finishing diets. Apparent total-tract digestibility (4-d total fecal collection), chewing behavior (6-d video recording), ruminal pH (6-d indwelling pH recording), and fermentation (1 day, sampling 0, 3, 6, 12, and 18 h postfeeding), short-chain fatty acid (SCFA) absorption (washed reticulo-rumen technique), gastrointestinal tract barrier function (marker infusion), and blood variables (catheters) were measured. Eight ruminally fistulated crossbred beef heifers (653 ± 44.2 kg; mean starting body weight [BW] ± SD) were used in a replicated 4 × 4 Latin square design with 28-d periods. Dietary treatments were 0%, 4%, 8%, and 12% of dietary dry matter (DM) as barley silage, with diets containing 80%, 76%, 72%, and 68% barley grain, respectively. Increasing silage proportion decreased dietary starch content from 49.0% to 43.1% DM, while neutral detergent content increased from 22.7% to 25.1% DM. Silage proportion had no effect on DM intake, but apparent DM digestibility decreased quadratically (86.0%, 82.1%, 81.1%, 79.5% for the four diets, respectively; P < 0.001). Although, silage proportion had no effect on eating activity, rumination time increased quadratically (246, 289, 302, 316 min/d; P = 0.04). Increased silage proportion increased minimum (5.07, 5.27, 5.29, 5.41; quadratic, P = 0.011) and mean (5.61, 5.87, 5.93, 5.95; quadratic, P = 0.007) ruminal pH, and there was a quadratic (P ≤ 0.047) decrease in duration and area under the pH acidosis threshold curves of 5.8, 5.5, and 5.2. Although increasing silage proportion decreased ruminal acidosis, it was not completely eliminated even with a diet containing 12% silage DM. SCFA concentration in ruminal fluid was not affected by diet, but silage proportion quadratically (P ≤ 0.088) increased ruminal acetate:propionate. There was no effect of diet on absolute or fractional rates of absorption of acetate, propionate, butyrate or total SCFA, and no effect on gastrointestinal barrier function or blood measurements. In conclusion, responses to roughage level were mostly quadratic with greatest improvements in acidosis variables between 0% and 4% barley silage, with incremental improvements with further increases in silage levels. The study showed a trade-off between maximizing digestibility and energy intake to promote animal performance and minimizing the risk of acidosis.
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Affiliation(s)
- Gwinyai E Chibisa
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB Canada
| | - Karen A Beauchemin
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB Canada
| | - Karen M Koenig
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB Canada
| | - Gregory B Penner
- Department of Animal Poultry Science, University of Saskatchewan, Saskatoon, SK Canada
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26
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Dias LSB, Silva DDS, Carvalho GGPD, Araújo MLGMLD, Silva FFD, Pereira MLA, Gandra JR, Lima VGO, Santos ACSD, Bulcão LFDA, Leite VM, Freitas Júnior JED. Chitosan associated with whole raw soybean in diets for Murrah buffaloes on ruminal fermentation, apparent digestibility and nutrients metabolism. Anim Sci J 2020; 91:e13435. [PMID: 32869472 DOI: 10.1111/asj.13435] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 04/01/2020] [Accepted: 04/13/2020] [Indexed: 12/01/2022]
Abstract
This study aimed to investigate the effects of chitosan and whole raw soybean on nutrient intake, apparent digestibility, nitrogen utilization, microbial protein synthesis, blood metabolites, feeding behavior, ruminal fermentation, digesta kinetics, and reticular flow of nutrients of buffaloes. Four ruminally-cannulated Murrah buffaloes (351 ± 15 kg of initial BW) were randomly assigned according to a 4 × 4 Latin square design. Treatments were arranged as 2 × 2 factorial arrangement: the first factor was whole raw soybean (WRS), and the second factor was chitosan (CHI) with or without their inclusion in diets. Intake and apparent digestibility of ether extract (p < .01; p = .04, respectively), non-fiber carbohydrates intake (p = .03) and apparent ruminal digestibility of dry matter (p = .01) were affected by diets. An interaction effect or tendency was observed for microbial nitrogen (p = .09), concentrations, ruminal ammonia nitrogen (p = .05), total volatile fatty acid (p = .03). Association of chitosan with whole raw soybean has potential effects as a modulator of rumen fermentation; therefore, chitosan can be applied as an alternative non-ionophore for Murrah buffaloes.
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Affiliation(s)
- Lais S B Dias
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
| | - Dayane de S Silva
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
| | - Gleidson Giordano P de Carvalho
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
| | - Maria Leonor G M L de Araújo
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
| | - Fabiano F da Silva
- Department of Ruminant Production, State University of Southwest Bahia, Itapetinga, Bahia, Brazil
| | - Mara Lúcia A Pereira
- Department of Ruminant Production, State University of Southwest Bahia, Itapetinga, Bahia, Brazil
| | - Jefferson R Gandra
- Department of Animal Science, Federal University of Grande Dourados, Dourados, Brazil
| | - Victor G O Lima
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
| | - Antônio C S Dos Santos
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
| | - Lucas F de A Bulcão
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
| | - Vagner M Leite
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
| | - José Esler de Freitas Júnior
- Department of Animal Science, School of Veterinary Medicine and Animal Science, Federal University of Bahia (UFBA), Salvador, Brazil
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27
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Castro LP, Pereira MN, Dias JDL, Lage DVD, Barbosa EF, Melo RP, Ferreira K, Carvalho JTR, Cardoso FF, Pereira RAN. Lactation performance of dairy cows fed rehydrated and ensiled corn grain differing in particle size and proportion in the diet. J Dairy Sci 2019; 102:9857-9869. [PMID: 31521352 DOI: 10.3168/jds.2019-16559] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 07/18/2019] [Indexed: 11/19/2022]
Abstract
Rehydrated and ensiled mature ground corn has high ruminal starch digestibility, but particle size (PS) and dietary starch proportion (ST) can affect starch digestion and lactating cow performance. We evaluated the effect of rehydrated and ensiled corn (REC), PS, and ST on intake, lactation performance, nutrient digestibility, ruminal fermentation profile, and chewing behavior of dairy cows. Kernels from an 84% vitreousness hybrid were finely (FN) or coarsely (CS) ground, yielding geometric mean particle sizes of 1,591 and 2,185 µm, respectively. Ground kernels were rehydrated [60% dry matter (DM)] and ensiled in 200-L buckets for ≥205 d. The grinding rate (t/h) was 3.9 for FN and 11.7 for CS. The PS did not affect DM loss (11.3% of ensiled) or silage pH (3.8). Samples of each bucket (n = 15/PS) before and after silage fermentation were incubated in situ for 0, 3, 6, 18, and 48 h in 4 rumen-cannulated lactating cows. Ensiling increased the effective ruminal in situ DM degradation (63.7 vs. 34.1%), regardless of PS. Sixteen Holstein cows (152 ± 96 d in milk) in 4 × 4 Latin squares (21-d periods) were individually fed a 2 × 2 factorial combination of low (LO) or high (HI) starch diets with FN or CS. Cows were fed the same REC incubated in situ. Varied concentration of starch in the diet (29.2 vs. 23.5% of DM) was achieved by partial replacement of REC (22.0 vs. 14.2% of DM) with citrus pulp (0 vs. 8.2% of DM). Milk, protein, fat, and lactose yields did not differ. Milk fat percentage was reduced and protein percentage was increased by HI. Treatment FN increased feed efficiency (energy-corrected milk/digestible organic matter intake) when fed with HI. Total-tract starch digestibility tended to be reduced by CS (96.4 vs. 97.2% of starch intake). Serum β-hydroxybutyrate was increased by LO. High-starch diet reduced the molar proportions of acetate and butyrate in ruminal fluid and increased propionate and isoacids. Particle size did not affect ruminal fermentation profile. Coarse grinding reduced plasma d-lactate concentration with HI. Diet HI reduced the proportion of daily intake from 1900 to 0700 h and induced preferential intake of feed particles <8 mm and greater refusal of particles >19 mm in the morning. Fine REC reduced rumination time per day and increased eating time per DM intake. Milk and plasma urea-N did not differ. Ensiling of mature flint corn for >200 d largely eliminated the effect of the PS of REC on the studied outcomes. The proportion of REC in the diet affected ruminal fermentation profile and milk solids concentration, but did not affect short-term performance and digestibility. Coarse grinding of REC may allow increasing the grinding rate and thus save labor and energy during ensiling.
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Affiliation(s)
- Lucas P Castro
- Universidade Federal de Lavras, Lavras, MG 37200-000, Brazil
| | - Marcos N Pereira
- Universidade Federal de Lavras, Lavras, MG 37200-000, Brazil; Better Nature Research Center, Ijaci, MG 37218-000, Brazil.
| | - Julia D L Dias
- Universidade Federal de Lavras, Lavras, MG 37200-000, Brazil
| | | | | | - Ricardo P Melo
- Universidade Federal de Lavras, Lavras, MG 37200-000, Brazil
| | - Karla Ferreira
- Universidade Federal de Lavras, Lavras, MG 37200-000, Brazil
| | | | | | - Renata A N Pereira
- Better Nature Research Center, Ijaci, MG 37218-000, Brazil; Empresa de Pesquisa Agropecuária de Minas Gerais, Lavras, MG 37200-000, Brazil
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Albornoz RI, Harvatine KJ, Allen MS. Diet starch concentration and starch fermentability affect energy intake and energy balance of cows in the early postpartum period. J Dairy Sci 2019; 102:5161-5171. [PMID: 30981484 DOI: 10.3168/jds.2018-15634] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Accepted: 02/17/2019] [Indexed: 11/19/2022]
Abstract
Our objective was to evaluate the effects of diet starch concentration and fermentability on energy intake and energy balance during the early postpartum (PP) period. Fifty-two multiparous Holstein cows were used in a randomized block design experiment with a 2 × 2 factorial arrangement of treatments. Treatment rations were formulated to 22% or 28% starch concentration (LS and HS, respectively) with dry ground corn (DGC) or high moisture corn (HMC) as the primary starch source. Rations were formulated for 22% forage neutral detergent fiber (NDF) and 17% crude protein and fed from 1 to 23 d PP. Starch concentration was adjusted by altering concentrations of corn grain and soyhulls. Dry matter intake and milk yield were measured daily, and milk components, milk composition, body condition score (BCS), body weight (BW), and back fat thickness (BFT) were measured weekly. Feeds and refusals as well as fecal samples were collected, and digestibility was determined weekly. High moisture corn (HMC) decreased dry matter and net energy (NEL) intakes compared with DGC more when included in an HS diet (3.9 kg/d and 3.2 Mcal/d) than in an LS diet (0.9 kg/d and 0.6 Mcal/d). The HMC treatment decreased NDF digestibility 3.7 percentage units compared with DGC when included in the HS diet but had little effect when included in an LS diet. Compared with DGC, HMC increased weekly BW and BFT loss when included in an HS diet (-34.7 vs. -8.4 kg/wk and -0.12 vs. -0.10 cm/wk) and decreased weekly BW loss but increased weekly BFT loss when included in an LS diet (-18.9 vs. -21.4 kg/wk and -0.11 vs. -0.02 cm/wk). Weekly BCS loss increased for HMC compared with DGC (-0.33 vs. -0.23 unit/wk). High moisture corn also decreased milk NEL output compared with DGC (28.2 vs. 31 Mcal/d), but had little effect on energy balance, which was improved by HS compared with LS (-14.7 vs. -16.8 Mcal/d). Over time, concentrations of milk de novo fatty acids (<16 carbons) increased and concentration of milk preformed fatty acids (>16 carbons) decreased for all treatments, but yields of both sources as well as yield of mixed fatty acids (C16:0 plus C16:1 cis-9 and iso-C16:0) decreased over time with increased SF. Feeding HMC decreased energy intake and milk energy output, but it had little effect on energy balance during the early PP period.
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Affiliation(s)
- R I Albornoz
- Department of Animal Science, Michigan State University, East Lansing 48824
| | - K J Harvatine
- Department of Animal Science, The Pennsylvania State University, University Park 16802
| | - M S Allen
- Department of Animal Science, Michigan State University, East Lansing 48824.
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Martins CMMR, Fonseca DCM, Alves BG, Arcari MA, Ferreira GC, Welter KC, Oliveira CAF, Rennó FP, Santos MV. Effect of dietary crude protein degradability and corn processing on lactation performance and milk protein composition and stability. J Dairy Sci 2019; 102:4165-4178. [PMID: 30879826 DOI: 10.3168/jds.2018-15553] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 01/22/2019] [Indexed: 11/19/2022]
Abstract
The present study aimed to evaluate the effect of crude protein degradability and corn processing on lactation performance, milk protein composition, milk ethanol stability (MES), heat coagulation time (HCT) at 140°C, and the efficiency of N utilization for dairy cows. Twenty Holstein cows with an average of 162 ± 70 d in milk, 666 ± 7 kg of body weight, and 36 ± 7.8 kg/d of milk yield (MY) were distributed in a Latin square design with 5 contemporaneous balanced squares, 4 periods of 21 d, and 4 treatments (factorial arrangement 2 × 2). Treatment factor 1 was corn processing [ground (GC) or steam-flaked corn (SFC)] and factor 2 was crude protein (CP) degradability (high = 10.7% rumen-degradable protein and 5.1% rumen-undegradable protein; low = 9.5% rumen-degradable protein and 6.3% rumen-undegradable protein; dry matter basis). A significant interaction was observed between CP degradability and corn processing on dry matter intake (DMI). When cows were fed GC with low CP degradability, DMI increased by 1.24 kg/d compared with cows fed GC with high CP degradability; however, CP degradability did not change DMI when cows were fed SFC. Similar interactions were observed for MY, HCT, and lactose content. When cows were fed GC diets, high CP degradability reduced MY by 2.3 kg/d, as well as HCT and lactose content, compared with low CP degradability. However, no effect of CP degradability was observed on those variables when cows were fed SFC diets. The SFC diets increased dry matter and starch total-tract digestibility and reduced β-casein (CN) content (% total milk protein) compared with GC diets. Cows fed low-CP degradability diets had higher glycosylated κ-CN content (% total κ-CN) and MES, as well as milk protein content, 3.5% fat-corrected milk, and efficiency of N for milk production, than cows fed high-CP degradability diets. Therefore, GC and high-CP degradability diets reduced milk production and protein stability. Overall, low CP degradability increased the efficiency of dietary N utilization and MES, probably due to changes in casein micelle composition, as CP degradability or corn processing did not change the milk concentration of ionic calcium. The GC diets increased β-CN content, which could contribute to reducing HTC when cows were fed GC and high-CP degradability diets.
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Affiliation(s)
- C M M R Martins
- Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - D C M Fonseca
- Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - B G Alves
- Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - M A Arcari
- Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - G C Ferreira
- Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - K C Welter
- Department of Animal Science, School of Food Engineering and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - C A F Oliveira
- Department of Food Engineering, School of Food Engineering and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - F P Rennó
- Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil
| | - M V Santos
- Department of Animal Nutrition and Production, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga 13635-900, São Paulo, Brazil.
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Allen MS. Do more mechanistic models increase accuracy of prediction of metabolisable protein supply in ruminants? ANIMAL PRODUCTION SCIENCE 2019. [DOI: 10.1071/an19337] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Ruminal microbes partially degrade dietary protein and synthesise microbial protein, which, along with undegraded true protein, contributes to metabolisable protein for the animal. Rumen models have been developed over the past several decades in an effort to better predict metabolisable protein supply for ration formulation for ruminants. These models have both empirical and mechanistic components. Separation of dietary protein into fractions that include non-protein nitrogen, true protein and unavailable protein has been a fundamental element of these models. Ruminal degradation of one or more true protein fractions is then estimated on the basis of the kinetics of digestion and passage. Some models use the same method to predict substrate supply for microbial protein production. Although mechanistic models have been extensively used in diet-formulation programs worldwide, their ability to improve accuracy of prediction of metabolisable protein over simpler empirical models is questionable. This article will address the potential of mechanistic models to better predict metabolisable protein supply in ruminants as well as their limitations.
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Fernandes T, Ávila C, Pereira M, Ferraretto L. Short communication: Effect of washing method, grinding size, and the determination of an indigestible fraction on in situ degradation of starch in mature corn grain. J Dairy Sci 2018; 101:9052-9057. [DOI: 10.3168/jds.2018-14870] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 06/22/2018] [Indexed: 11/19/2022]
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32
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Freitas JE, Takiya CS, Del Valle TA, Barletta RV, Venturelli BC, Vendramini THA, Mingoti RD, Calomeni GD, Gardinal R, Gandra JR, Bettero VP, Ferreira de Jesus E, Oliveira MDS, Rennó FP. Ruminal biohydrogenation and abomasal flow of fatty acids in lactating cows fed diets supplemented with soybean oil, whole soybeans, or calcium salts of fatty acids. J Dairy Sci 2018; 101:7881-7891. [PMID: 30007815 DOI: 10.3168/jds.2017-13666] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 04/13/2018] [Indexed: 12/17/2023]
Abstract
Ruminants have a unique metabolism and digestion of unsaturated fatty acids (UFA). Unlike monogastric animals, the fatty acid (FA) profile ingested by ruminants is not the same as that reaching the small intestine. The objective of this study was to evaluate whole raw soybeans (WS) in diets as a replacer for calcium salts of fatty acids (CSFA) in terms of UFA profile in the abomasal digesta of early- to mid-lactation cows. Eight Holstein cows (80 ± 20 d in milk, 22.9 ± 0.69 kg/d of milk yield, and 580 ± 20 kg of body weight; mean ± standard deviation) with ruminal and abomasal cannulas were used in a 4 × 4 Latin square experiment with 22-d periods. The experiment evaluated different fat sources rich in linoleic acid on ruminal kinetics, ruminal fermentation, FA abomasal flow, and milk FA profile of cows assigned to treatment sequences containing a control (CON), with no fat source; soybean oil, added at 2.68% of diet dry matter (DM); WS, addition of WS at 14.3% of diet DM; and CSFA, addition of CSFA at 2.68% of diet DM. Dietary fat supplementation had no effect on nutrient intake and digestibility, with the exception of ether extract. Cows fed fat sources tended to have lower milk fat concentration than those fed CON. In general, diets containing fat sources tended to decrease ruminal neutral detergent fiber digestibility in relation to CON. Cows fed WS had lower ruminal digestibility of DM and higher abomasal flow of DM in comparison to cows fed CSFA. As expected, diets containing fat supplements increased FA abomasal flow of C18:0 and total FA. Cows fed WS tended to present a higher concentration of UFA in milk when compared with those fed CSFA. This study suggests that under some circumstances, abomasal flow of UFA in early lactation cows can be increased by supplementing their diet with fat supplements rich in linoleic acid, regardless of rumen protection, with small effects on ruminal DM digestibility.
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Affiliation(s)
- J E Freitas
- Department of Animal Science, Federal University of Bahia, Salvador, Brazil, 0170-110
| | - C S Takiya
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - T A Del Valle
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - R V Barletta
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - B C Venturelli
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - T H A Vendramini
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - R D Mingoti
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - G D Calomeni
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - R Gardinal
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900
| | - J R Gandra
- Department of Animal Science, Federal University of Grande Dourados, Dourados, Brazil, 79825-070
| | - V P Bettero
- Department of Animal Science, Sao Paulo State University, Jaboticabal, Brazil, 14884-900
| | - E Ferreira de Jesus
- Department of Animal Science, Sao Paulo State University, Jaboticabal, Brazil, 14884-900
| | - M D S Oliveira
- Department of Animal Science, Sao Paulo State University, Jaboticabal, Brazil, 14884-900
| | - F P Rennó
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil, 13635-900.
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Andreazzi AS, Pereira MN, Reis RB, Pereira RA, Morais Júnior NN, Acedo TS, Hermes RG, Cortinhas CS. Effect of exogenous amylase on lactation performance of dairy cows fed a high-starch diet. J Dairy Sci 2018; 101:7199-7207. [DOI: 10.3168/jds.2017-14331] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 03/28/2018] [Indexed: 11/19/2022]
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Batistel F, de Souza J, Santos FAP. Corn grain-processing method interacts with calcium salts of palm fatty acids supplementation on milk production and energy balance of early-lactation cows grazing tropical pasture. J Dairy Sci 2017; 100:5343-5357. [DOI: 10.3168/jds.2016-12503] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 03/08/2017] [Indexed: 12/11/2022]
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35
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Bettero VP, Del Valle TA, Barletta RV, de Araújo CE, Ferreira de Jesus E, de Almeida GF, Takiya CS, Zanferari F, de Paiva PG, de Freitas Júnior JE, Rennó FP. Use of protected fat sources to reduce fatty acid biohydrogenation and improve abomasal flow in dry dairy cows. Anim Feed Sci Technol 2017. [DOI: 10.1016/j.anifeedsci.2016.12.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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González García UA, Corona L, Castrejon-Pineda F, Balcells J, Castelan Ortega O, Gonzalez-Ronquillo M. A comparison of processed sorghum grain using different digestion techniques. JOURNAL OF APPLIED ANIMAL RESEARCH 2016. [DOI: 10.1080/09712119.2016.1250642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ulises Alejandro González García
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autonoma del Estado de México, Toluca, Mexico
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autonoma de Guerrero, Altamirano Guerrero, México
| | - Luis Corona
- Departamento de Nutricion Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autonoma de Mexico, Ciudad de México, México
| | - Francisco Castrejon-Pineda
- Departamento de Nutricion Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autonoma de Mexico, Ciudad de México, México
| | - Joaquim Balcells
- Department Producció Animal, ETSEA, Universitat Lleida, Lleida, Spain
| | - Octavio Castelan Ortega
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autonoma del Estado de México, Toluca, Mexico
| | - Manuel Gonzalez-Ronquillo
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autonoma del Estado de México, Toluca, Mexico
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37
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Arcari M, Martins C, Tomazi T, Gonçalves J, Santos M. Effect of substituting dry corn with rehydrated ensiled corn on dairy cow milk yield and nutrient digestibility. Anim Feed Sci Technol 2016. [DOI: 10.1016/j.anifeedsci.2016.08.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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38
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Silva T, Takiya C, Vendramini T, Jesus EFD, Zanferari F, Rennó F. Effects of dietary fibrolytic enzymes on chewing time, ruminal fermentation, and performance of mid-lactating dairy cows. Anim Feed Sci Technol 2016. [DOI: 10.1016/j.anifeedsci.2016.08.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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39
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Huhtanen P, Detmann E, Krizsan SJ. Prediction of rumen fiber pool in cattle from dietary, fecal, and animal variables. J Dairy Sci 2016; 99:5345-5357. [PMID: 27085408 DOI: 10.3168/jds.2015-10842] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 03/02/2016] [Indexed: 11/19/2022]
Abstract
Feed intake control in ruminants is based on the integration of physical constraints and metabolic feedbacks. Physical constraints are related to the fill caused by the weight or volume of digesta in the reticulo-rumen. The amount of neutral detergent fiber (NDF) in the rumen (RNDF) may be used as an indicator of rumen fill. The objective of this study was to develop equations predicting RNDF from diet and animal characteristics using a meta-analysis technique. A treatment mean data set (n=314) was obtained from 84 studies, in which rumen pool size and diet digestibility were determined in lactating cows (n=231) or growing cattle (n=83). The data were analyzed using linear and nonlinear mixed models. Intake, rumen pool size, and fecal output of NDF were scaled to body weight (BW)(1.0). Due to the heterogeneous nature of dietary NDF, predictions of RNDF based on NDF intake were not precise. Predictions were markedly improved by dividing NDF into potentially digestible and indigestible fractions, because rumen turnover time of indigestible NDF was 2.7 times longer than that of potentially digestible NDF. At equal NDF intake, RNDF was negatively associated with dietary crude protein concentration and positively with the proportion of concentrate in the diet. Models based on fecal NDF output generally performed better than those based on NDF intake, probably because the effects of intrinsic characteristics of dietary cell walls and associative effects of dietary components collectively influence fecal NDF output. The model based on fecal NDF output was improved by including dietary concentration of forage NDF in the model, reflecting slower turnover of forage NDF compared with concentrate NDF. The curvilinear relationship between fecal NDF output and RNDF could be described by a quadratic, Mitscherlich, or power function equation, which performed better than the quadratic or Mitscherlich equation. In addition to fecal NDF output and dietary concentration of forage NDF, animal and forage type had significant effects on RNDF. At the same fecal NDF output, growing cattle had a smaller RNDF than dairy cattle. Increased proportion of alfalfa or corn silages in forage decreased RNDF and increased proportion of tropical forages decreased it. It is concluded that RNDF can be predicted precisely from intake or fecal output data, and that predicted RNDF can be a useful tool in understanding the interplay between physical and metabolic factors regulating feed intake in ruminants.
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Affiliation(s)
- P Huhtanen
- Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences, S-901 83 Umeå, Sweden.
| | - E Detmann
- Department of Animal Science, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil, 36570-900
| | - S J Krizsan
- Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences, S-901 83 Umeå, Sweden
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Rezaei J, Rouzbehan Y, Zahedifar M, Fazaeli H. Effects of dietary substitution of maize silage by amaranth silage on feed intake, digestibility, microbial nitrogen, blood parameters, milk production and nitrogen retention in lactating Holstein cows. Anim Feed Sci Technol 2015. [DOI: 10.1016/j.anifeedsci.2015.01.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Fredin S, Akins M, Ferraretto L, Shaver R. Effects of corn-based diet starch content and neutral detergent fiber source on lactation performance, digestibility, and bacterial protein flow in dairy cows. J Dairy Sci 2015; 98:554-65. [DOI: 10.3168/jds.2014-8592] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 09/30/2014] [Indexed: 11/19/2022]
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42
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Carmo CA, Batistel F, de Souza J, Martinez JC, Correa P, Pedroso AM, Santos FAP. Starch levels on performance, milk composition and energy balance of lactating dairy cows. Trop Anim Health Prod 2014; 47:179-84. [DOI: 10.1007/s11250-014-0704-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 10/05/2014] [Indexed: 11/28/2022]
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43
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Rico D, Ying Y, Clarke A, Harvatine K. The effect of rumen digesta inoculation on the time course of recovery from classical diet-induced milk fat depression in dairy cows. J Dairy Sci 2014; 97:3752-60. [DOI: 10.3168/jds.2013-7342] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 03/06/2014] [Indexed: 12/29/2022]
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45
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Sun Y, Oba M. Effects of feeding a high-fiber byproduct feedstuff as a substitute for barley grain on rumen fermentation and productivity of dairy cows in early lactation. J Dairy Sci 2014; 97:1594-602. [DOI: 10.3168/jds.2013-7068] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Accepted: 11/09/2013] [Indexed: 11/19/2022]
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Costa F, Dias Júnior G, Zacaroni O, Santos J, Pereira R, Pereira M. Silagem de grãos úmidos de milho de textura dura ou macia em dietas com polpa cítrica para vacas em lactação. ARQ BRAS MED VET ZOO 2014. [DOI: 10.1590/s0102-09352014000100028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Avaliou-se o desempenho de vacas leiteiras que consumiram polpa cítrica e dois teores dietéticos de silagem de grão úmido de milho. Os tratamentos foram: milho de textura dura ou milho de textura macia ensilado na linha negra, em fatorial com 9% ou 18% de milho na dieta. O teor de polpa cítrica na dieta foi de 16,2% ou 25,6%, com alto e baixo milho, respectivamente. Doze vacas receberam os tratamentos em quadrados latinos 4x4. A produção diária de leite foi 27,9kg no milho duro e 28,8 no macio (P=0,19). Alto milho diminuiu o teor de gordura do leite de 3,38 para 3,26% (P=0,04) e aumentou o teor de proteína de 2,99 para 3,03% (P=0,05) e a eficiência alimentar de 1,50 para 1,57kg de leite/kg de consumo (P=0,03). Aumento no teor de milho induziu maior queda no pH ruminal na dieta com milho macio do que na dieta com milho duro (P=0,05 para a interação textura versus teor de milho). O milho macio aumentou o consumo diário de matéria orgânica digestível de 11,7 para 12,3kg (P=0,05). Os parâmetros digestivos sugerem que a ensilagem não eliminou totalmente o efeito da textura do endosperma sobre a digestibilidade do milho.
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47
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Hall MB. Dietary starch source and protein degradability in diets containing sucrose: effects on ruminal measures and proposed mechanism for degradable protein effects. J Dairy Sci 2013; 96:7093-7109. [PMID: 24054288 DOI: 10.3168/jds.2012-5663] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Accepted: 07/24/2013] [Indexed: 11/19/2022]
Abstract
A feeding study was conducted to evaluate ruminal effects of starch source (STA) and rumen-degradable dietary protein (RDP) in diets with added sucrose. The experimental design was an incomplete Latin square with three 21-d periods, 8 ruminally cannulated lactating cows, and a 2 × 2 factorial arrangement of treatments. Treatments were STA (dry ground corn or high-moisture corn) as more slowly and more rapidly fermenting starch sources, respectively, and relative amount of RDP (+RDP: added protein from soybean meal; -RDP: heat-treated expeller soybean product partially substituted for soybean meal). Diets were formulated to be isonitrogenous and similar in starch and neutral detergent fiber concentrations. Dry matter (DM) intake was 1 kg greater with +RDP compared with -RDP diets. For ruminal digesta measures made 2 h postfeeding, weight of digesta DM was unaffected by treatment; total kilograms of wet digesta and kilograms of liquid tended to be greater with +RDP than with -RDP, and no effect was observed of STA × RDP. Digesta DM percentage was greater with -RDP than with +RDP. At 2 h postfeeding, ruminal pool sizes (mol) of lactate and total AA were larger and those of total organic acids (OA) and ammonia tended to be larger with +RDP than with -RDP; no effects of STA or STA × RDP were detected. Rumen-degradable protein effects on lactate and OA pool sizes may be due to a protein-mediated increase in fermentation rate of carbohydrate. Organic acid concentrations at 2 h postfeeding did not show the same response pattern or significance as the pool size data; high-moisture corn tended to be greater than dry ground corn and no effect was observed for RDP or STA × RDP. Concentration and pool size for OA were more weakly correlated [coefficient of determination (R(2)) = 0.66] than was the case for other ruminal analytes (R(2) >0.80). Organic acid pool size and kilograms of digesta liquid were strongly correlated (R(2) = 0.79), whereas concentration and kilograms of liquid were much less so (R(2) = 0.21). The correlation of OA moles with kilograms of liquid likely relates to the homeostatic mechanism of water flux across the rumen wall to reduce the osmotic gradient with blood as intraruminal moles of solute change. This action compresses the range of ruminal OA concentrations. With kilograms of ruminal liquid differing across individual measurements, the ruminal OA concentration data are not on the equivalent basis required to be reliably useful for assessing the effect of treatments. Further evaluation of protein effects on carbohydrate fermentation and of methods that allow accurate comparison of treatments for their effect on ruminal OA production are warranted.
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Affiliation(s)
- Mary Beth Hall
- US Dairy Forage Research Center, US Department of Agriculture-Agricultural Research Service (USDA-ARS), Madison, WI 53706.
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Ogino M, Matsuura A, Yamazaki A, Irimajiri M, Takahashi H, Komatsu T, Kushibiki S, Shingu H, Kasuya E, Hasegawa Y, Hodate K. Biological rhythms related to metabolism in Japanese Shorthorn cattle under varying environments and management techniques. Anim Sci J 2013; 84:513-26. [PMID: 23607269 DOI: 10.1111/asj.12029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 10/17/2012] [Indexed: 11/28/2022]
Abstract
Plasma insulin (INS), thyroxin (T4 ), glucose (GLU), non-esterified fatty acid (NEFA), blood urea nitrogen (BUN), rectal temperature (RT) and eating behavior were evaluated in Japanese Shorthorn cattle under varying external environments and management techniques. Serial blood collection and assessments of RT and eating behavior were performed over 48 h in the spring, summer, autumn and winter in four female cattle reared under either free-stall and ad libitum feeding (FA) conditions or tie-stall and restricted feeding (TR) conditions. Cycle patterns for each parameter were examined using spectral analysis, and correlations between parameters were investigated using cross-spectral analysis. Rhythms for all parameters, except eating behavior and T4 , did not differ significantly among the varied external environments and between management techniques, although seasonal differences in the concentration or value of parameters were observed. An approximate 3- or 4-h rhythm cycle detected in T4 , GLU, NEFA, BUN, and RT might be the common metabolic rhythm. Under both conditions, the metabolite levels showed strong correlations with eating behavior. Moreover, GLU positively correlated with INS at lag time of 0 h, as did eating behavior and RT.
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Affiliation(s)
- Mizuna Ogino
- Department of Animal Science, School of Veterinary Medicine, Kitasato University, Towada, Japan
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Krizsan SJ, Huhtanen P. Effect of diet composition and incubation time on feed indigestible neutral detergent fiber concentration in dairy cows. J Dairy Sci 2013; 96:1715-26. [PMID: 23312997 DOI: 10.3168/jds.2012-5752] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Accepted: 11/16/2012] [Indexed: 11/19/2022]
Abstract
Indigestible neutral detergent fiber (NDF) predicts forage digestibility accurately and precisely when determined by a 288-h ruminal in situ incubation, and it is an important parameter in mechanistic rumen models. The long incubation time required is a disadvantage. Further, intrinsic cell wall characteristics of feeds should be determined under ideal conditions for fiber digestion. The objective of this study was to determine the effects of diet composition and rumen incubation time on the concentrations of indigestible NDF (iNDF) for a wide range of feeds in dairy cows. Additionally, predicted concentrations of unavailable NDF generated using the National Research Council (NRC) model and the Cornell Net Carbohydrate and Protein System (CNCPS) were evaluated. Indigestible NDF was evaluated in 18 feeds using 4 cows in a split-split plot design. Treatments were in a 3 × 3 factorial arrangement, consisting of different diets and incubation times. Diet composition was primarily varied by changing the level of concentrate supplementation between 190 (low), 421 (medium), and 625 (high)g/kg of diet dry matter (DM). Grass silage was used as the basal forage for all cows. The feeds were incubated for 144, 216, and 288 h. Indigestible NDF was determined from 2-g samples weighed into polyester bags with a pore size of 12 µm and a pore area equal to 6% of the total surface area, giving a sample size to surface ratio of 10mg/cm(2). Across all feeds, the measured iNDF concentrations ranged from 6 to 516 g/kg of DM. The feed iNDF concentration was not affected by the cow used, but diet composition had a significant effect. The mean measured iNDF concentrations for cows consuming low-, medium-, and high-concentrate diets were 178, 186, and 197 g/kg of DM, respectively. The incubation time also affected the feed iNDF concentrations, which averaged 199, 185, and 177 g/kg of DM for 144-, 216-, and 288-h incubations, respectively. We also observed significant interactions between incubation time and feed, and between diet composition and feed, with fiber-rich feeds being most sensitive to these factors. The evaluation of model predictions of unavailable NDF indicated poor precision with prediction errors of 56 (NRC) and 84 (CNCPS)g/kg of DM. Indigestible NDF should be determined based on 288-h ruminal in situ incubations in cows consuming diets with a low proportion of concentrate to represent the feed fraction that is unavailable to the animal.
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Affiliation(s)
- S J Krizsan
- Swedish University of Agricultural Sciences, Department of Agricultural Research for Northern Sweden, S-901 83 Umeå, Sweden.
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Ferraretto L, Crump P, Shaver R. Effect of cereal grain type and corn grain harvesting and processing methods on intake, digestion, and milk production by dairy cows through a meta-analysis. J Dairy Sci 2013; 96:533-50. [DOI: 10.3168/jds.2012-5932] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 10/02/2012] [Indexed: 01/13/2023]
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