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Jihene J, Khalil A, Samia BS, Hela Y, Atef M, Jamel R, Mohamed K. Effect of fibrolytic enzyme supplementation of urea-treated wheat straw on nutrient intake, digestion, growth performance, and blood parameters of growing lambs. Small Rumin Res 2022. [DOI: 10.1016/j.smallrumres.2022.106840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Yang J, Refat B, Guevara-Oquendo VH, Yu P. Lactational performance, feeding behavior, ruminal fermentation and nutrient digestibility in dairy cows fed whole-plant faba bean silage-based diet with fibrolytic enzyme. Animal 2022; 16:100606. [PMID: 35970105 DOI: 10.1016/j.animal.2022.100606] [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: 02/28/2022] [Revised: 07/02/2022] [Accepted: 07/11/2022] [Indexed: 11/26/2022] Open
Abstract
Whole-plant faba bean silage has a high content in indigestible fiber. Improvement of fiber digestibility of faba bean silage would benefit animal production. However, there is no study on pretreating fibrolytic enzyme in whole-plant faba bean silage-based diet for dairy cows on animal performance. The objectives of this study were to evaluate the effects of pretreating whole-plant faba bean silage-baseddiet with fibrolytic enzyme (a mixture of xylanase and cellulase; AB Vista, UK) derived from Trichoderma reesei(FETR) on lactational performance, digestibility, ruminal fermentation characteristics, and feeding behavior of dairy cows. The animal trial was conducted using eight lactating Holstein cows (BW = 710 ± 44 kg and Days in Milk (DIM) = 121 ± 17 days) with four levels of FETR (0, 0.5, 0.75, and 1.0 mL of FETR/kg DM of silage) in a replicated Latin square design. These enzyme treatments were selected based on the previous in situ and in vitro findings that showed positive responses to the whole-plant faba bean silage. The enzyme treatments were directly applied on the silage prior to mixing process. The total mixed rations contained 31% of faba bean silage, 14% of grass hay, 3.5% of straw, 30% of barley and corn grain and 21.5% of concentrate. There was no significant difference of applying FETR on nutrient intake (P > 0.05) except for CP intake, which was reduced in FETR group compared to control (P < 0.01, 4.4 vs 4.54 kg/d). There was a linear effect found in NDF digestibility when treated with FETR, where maximum improvement was achieved with 0.5 mL of FETR application. The milk fat yield, percentage of milk fat and fat-corrected milk were linearly affected by the increasing level of enzyme. The cows fed a diet supplemented with enzymes tended to have a lower milk fat. Feed efficiency linearly responded to incremental levels of FETR. There was no enzyme effect on feeding behavior and nitrogen balance and utilization. Results from this study indicated that supplementing fibrolytic enzyme on whole-plant faba bean silage diets for dairy cows improved lactational performance, intake and digestibility with 0.5 mL of FETR application. However, adding higher enzyme level resulted in negative effects on animal performance.
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Affiliation(s)
- Jenchieh Yang
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada
| | - Basim Refat
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada
| | - Victor H Guevara-Oquendo
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada
| | - Peiqiang Yu
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada.
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Savela MFB, Noschang JP, Barbosa AA, Feijó JDO, Rabassa VR, Schmitt E, Pino FABD, Corrêa MN, Brauner CC. Supplementation of a dried, fungal fermentation product with fibrolytic enzymatic activity in the diet of dairy cows on feeding behavior, metabolic profile, milk yield, and milk composition. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.104945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yang JC, Guevara-Oquendo VH, Christensen D, Lardner HB, Refat B, Rodríguez Espinosa ME, Yu P. Utilization of exogenous fibrolytic enzymes in fiber fermentation, degradation, and digestions and characteristics of whole legume faba bean and its plant silage. Crit Rev Food Sci Nutr 2022; 63:6114-6125. [PMID: 35152802 DOI: 10.1080/10408398.2022.2028126] [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] [Indexed: 11/03/2022]
Abstract
This article aims to review recent progress and update on utilization of exogenous fibrolytic enzymes in fiber fermentation, degradation, and digestions and nutritive and anti-nutritional characteristics of whole legume faba bean and its silage. The study focused on strategies to improve the utilization and bioavailability of fiber through pre-treating exogenous fibrolytic enzymes. The review includes features of nutrition and anti-nutritional factors and environment impact, forage fiber fermentation, degradation and digestion, legume bean in various diets, use of exogenous enzyme and factor affecting enzyme action in fiber digestion as well as exogenous enzyme response. This review also provides very recent research on effects of fibrolytic enzyme on rumen degradation characteristics of dry matter and fiber of whole plant faba bean silage and effect of exogenous fibrolytic enzyme derived from trichoderma reesei on lactational performance, feeding behavior, rumen fermentation and nutrient digestibility in dairy cows fed whole plant faba bean silage-based diet. This study provides an insight on nutritive and anti-nutritive characteristics of whole legume bean and its plant silage and utilization of exogenous fibrolytic enzymes in fiber fermentation, degradation, and digestions.
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Affiliation(s)
- Jen-Chieh Yang
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Victor H Guevara-Oquendo
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - David Christensen
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Herbert Bart Lardner
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Basim Refat
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - María E Rodríguez Espinosa
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Peiqiang Yu
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
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Vittorazzi PC, Marques JA, Takiya CS, Chesini RG, Bugoni M, da Silva GG, Nunes AT, Silva TBP, Dias MSS, Grigoletto NTS, Cortinhas CS, Acedo TS, Renno FP. Increasing doses of carbohydrases: Effects on rumen fermentation, nutrient digestibility, and performance of mid-lactation cows. J Dairy Sci 2021; 104:12508-12519. [PMID: 34600703 DOI: 10.3168/jds.2021-20514] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 08/14/2021] [Indexed: 11/19/2022]
Abstract
The objective of this study was to evaluate the effects of exogenous enzymes on nutrient intake and digestibility, rumen fermentation, and productivity of mid-lactating cows. Experiment 1 was designed to test increasing doses [0, 0.5, 1.0, or 1.5 g/kg of dry matter (DM)] of a combination of 2 enzyme products with xylanase and β-glucanase activities (Ronozyme Wx and Ronozyme VP, respectively; DSM Nutritional Products) on rumen fermentation and total apparent digestibility. Enzyme combinations had a ratio of endo-1,3(4)-β-glucanase to endo-1,4-β-xylanase of 8:2 (wt/wt). For experiment 1, 8 rumen cannulated lactating cows were used into a double 4 × 4 Latin square design experiment with 14 d of diet adaptation and 7 d of sampling. Despite no differences in feed intake, carbohydrases linearly increased neutral detergent fiber digestibility. Treatments marginally affected rumen fermentation, where a linear trend for lower rumen pH and a linear trend for greater isobutyrate concentration were observed with increasing enzyme dose. A trend for lower rumen NH3-N concentration was observed for cows receiving carbohydrases in comparison with control group. When comparing all enzyme treatments against control group, cows fed enzymes tended to produce more 3.5% fat-corrected milk (FCM), produced more milk fat, and had greater blood glucose concentration. Experiment 2 evaluated 3 doses (0, 0.5, or 0.75 g/kg of DM) of the same combination of enzyme products on performance of cows (n = 36) in a complete randomized block (n = 12) design. Cows received treatments for 9 wk. No interaction effects between treatments and time were observed for all variables assessed in this study. In agreement with experiment 1, no differences were detected for feed intake, but cows fed the enzyme products tended to produce more 3.5% FCM and milk fat compared with control. In addition, cows fed enzymes exhibited greater efficiency of FCM production (FCM ÷ DM intake) compared with control. No differences were detected for intake and productivity when comparing the 2 doses of carbohydrases. In summary, the enzyme products tested in this study may improve feed efficiency due to greater milk fat concentration.
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Affiliation(s)
- Paulo César Vittorazzi
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Julia A Marques
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Caio S Takiya
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Rodrigo G Chesini
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Milena Bugoni
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Guilherme G da Silva
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Alanne T Nunes
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Tássia B P Silva
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Mauro S S Dias
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | - Nathalia T S Grigoletto
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900
| | | | | | - Francisco P Renno
- Department of Animal Production and Animal Nutrition, University of Sao Paulo, Pirassununga, Brazil 13635-900.
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Selwet M. Influence of inoculation with Lactobacillus on fermentation, production of 1,2-propanediol and 1-propanol as well as Maize silage aerobic stability. Open Life Sci 2021; 15:373-378. [PMID: 33817225 PMCID: PMC7874582 DOI: 10.1515/biol-2020-0038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/26/2020] [Accepted: 04/21/2020] [Indexed: 11/15/2022] Open
Abstract
The aim of this study is to determine the influence of a commercial bacterial inoculant (L1) and a preparation (L2) containing three Lactobacillus strains capable of producing 1,2-propanediol and short-chain fatty acids on maize silage aerobic stability improvement. The research showed that during 90-day ensilage, the applied preparations significantly reduced the content of DM, water-soluble carbohydrates (WSCs), pH and DM recovery (P < 0.05). The concentration of lactic acid (LA), acetic acid (AA) and propionic acid (PA) in the inoculated samples increased significantly (P < 0.05). 1,2-Propandiol and 1-propanol were not found in control silages (without additives). The addition of L1 and L2 significantly (P < 0.05) increased the concentration of these substances. The L1 and L2 mixtures significantly extended (P < 0.05) the silage aerobic stability.
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Affiliation(s)
- Marek Selwet
- Department of General and Environmental Microbiology, Poznań University of Life Sciences, ul. Szydłowska 28, 60-637 Poznań, Poland
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Effect of extracts from baccharis, tamarind, cashew nut shell liquid and clove on animal performance, feed efficiency, digestibility, rumen fermentation and feeding behavior of bulls finished in feedlot. Livest Sci 2021. [DOI: 10.1016/j.livsci.2020.104361] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Lactation performance, nitrogen utilization, and profitability in dairy cows fed fermented total mixed ration containing wet corn gluten feed and corn stover in combination replacing a portion of alfalfa hay. Anim Feed Sci Technol 2020. [DOI: 10.1016/j.anifeedsci.2020.114687] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Effects of organic acid-based products added to total mixed ration on performance and ruminal fermentation of dairy cows. Anim Feed Sci Technol 2020. [DOI: 10.1016/j.anifeedsci.2020.114406] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Liu YR, Wang C, Liu Q, Guo G, Huo WJ, Zhang YL, Pei CX, Zhang SL. Effects of branched-chain volatile fatty acids and fibrolytic enzyme on rumen development in pre- and post-weaned Holstein dairy calves. Anim Biotechnol 2019; 31:512-519. [PMID: 31253064 DOI: 10.1080/10495398.2019.1633340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The study evaluated the effects of branched-chain volatile fatty acids (BCVFA) and fibrolytic enzyme (FE) on rumen development in calves. Forty Holstein male calves at the same ages (15 ± 2.5 days of age) and weights (45 ± 3.3 kg of body weight [BW]) were assigned randomly to four groups with a 2 × 2 factorial arrangement of treatments. Supplemental BCVFA (0 g/d or 18 g/d) and FE (0 g/d or 1.83 g/d) were fed to calves. Data were analyzed as a 2 × 2 factorial arrangement random design by the mixed procedure of SAS. The BCVFA × FE interaction was observed for ruminal propionate, blood growth hormone (GH) and insulin-like growth factor-1 (IGF-1), and GH receptor (GHR) and IGF-1 receptor (IGF-1R) expression in the rumen mucosa. Dry matter intake was higher for BCVFA addition. The higher average daily gain and ruminal volatile fatty acids were observed for BCVFA or FE addition. Stomach weight and the length and width of rumen papillae were higher for BCVFA addition. The higher expression of GHR, IGF-1R and 3-hydroxy-3-methylglutaryl-CoA synthase 1 in rumen mucosa, and blood GH and IGF-1 were observed with BCVFA or FE addition. Blood β-hydroxybutyrate and acetoacetate were higher for BCVFA addition. The results indicated that rumen development was promoted by BCVFA, but was not affected with FE addition in calves.
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Affiliation(s)
- Yan-Rong Liu
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P. R. China
| | - Cong Wang
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P. R. China
| | - Qiang Liu
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P. R. China
| | - Gang Guo
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P. R. China
| | - Wen-Jie Huo
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P. R. China
| | - Yan-Li Zhang
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P. R. China
| | - Cai-Xia Pei
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P. R. China
| | - Shuan-Lin Zhang
- College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu, P. R. China
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Improved Quality of Corn Silage When Combining Cellulose-Decomposing Bacteria and Lactobacillus buchneri during Silage Fermentation. BIOMED RESEARCH INTERNATIONAL 2019; 2019:4361358. [PMID: 30906772 PMCID: PMC6398051 DOI: 10.1155/2019/4361358] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/28/2018] [Accepted: 01/16/2019] [Indexed: 11/19/2022]
Abstract
This study aimed to investigate the effects of the combined use of cellulose-decomposing bacteria (CDB) and heterolactic lactic acid bacteria (LAB) on corn silage fermentation. Fresh maize was treated with heterolactic LAB or CDB combined with heterolactic LAB inoculants or without any treatment. Chemical and microbiological analyses were conducted at specific times after ensiling. A comprehensive value evaluation was conducted using the principal component analysis model. Although all treatments significantly affected the microorganism numbers during fermentation, the numbers of aerobic bacteria, LAB, yeast, and molds in the groups with combined CDB and LAB were significantly higher than those in the group with LAB only (P < 0.05). All treatments regulated the silage CO2 production. Each treatment had different effects on the nutrient degradation rate. Based on a comprehensive evaluation, the CDB and heterolactic LAB combination had the best effect on the ensiling process in improving the quality and feed value of corn silage.
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Zilio EMC, Del Valle TA, Ghizzi LG, Takiya CS, Dias MSS, Nunes AT, Silva GG, Rennó FP. Effects of exogenous fibrolytic and amylolytic enzymes on ruminal fermentation and performance of mid-lactation dairy cows. J Dairy Sci 2019; 102:4179-4189. [PMID: 30879828 DOI: 10.3168/jds.2018-14949] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 09/09/2018] [Indexed: 12/21/2022]
Abstract
Lactation diets are composed mostly of carbohydrates that are not fully fermented by rumen microbes. The aim of this study was to evaluate exogenous fibrolytic (Fibrozyme, Alltech Inc., Nicholasville, KY) and amylolytic (Amaize, Alltech Inc.) enzymes on nutrient intake, sorting index, total-tract apparent digestibility, ruminal fermentation, nitrogen utilization, milk yield, and composition of dairy cows in mid-lactation. Thirty-two multiparous Holstein cows (181 ± 35 d in milk, 571 ± 72.7 kg of body weight, and 29.6 ± 5.24 kg/d of milk yield at the start of experiment) were blocked according to milk yield and randomly allocated to treatments in a 4 × 4 Latin square design. Treatments were (1) control, basal diet without exogenous enzymes; (2) fibrolytic enzyme (FIB), dietary supplementation of Fibrozyme at 12 g/d (51 IU of xylanase activity/kg of diet dry matter); (3) amylolytic enzyme (AMY), dietary supplementation of Amaize at 8 g/d (203 fungal amylase units/kg of diet dry matter); and (4) both fibrolytic and amylolytic enzymes (FIB+AMY) added at the same dose of the individual treatments. Enzyme products were added to the concentrate during its preparation (once a week). The supply of FIB and AMY had no effect on nutrient intake and digestibility. However, an interaction effect was observed on sorting index of feed particle size between 8 and 19 mm. Amylolytic enzyme increased the sorting for feed particles between 8 and 19 mm, only when fed without FIB. In addition, AMY decreased the sorting for feed with particle size greater than 19 mm. An interaction effect was observed between FIB and AMY for ruminal butyrate concentration and N excretion. Amylolytic enzyme increased ruminal butyrate concentration in cows treated with FIB. Further, FIB decreased milk protein production and feed efficiency only in cows not fed AMY. Amylolytic enzyme reduced urinary N excretion. Exogenous enzymes had no effect on milk production and composition of dairy cows. This study lacks evidence that fibrolytic and amylolytic enzymes can affect nutrient digestibility, ruminal fermentation, and performance of mid-lactation cows.
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Affiliation(s)
- Elissandra M C Zilio
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil 13635-900
| | - Tiago A Del Valle
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil 13635-900
| | - Lucas G Ghizzi
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil 13635-900
| | - Caio S Takiya
- Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506
| | - Mauro S S Dias
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil 13635-900
| | - Alanne T Nunes
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil 13635-900
| | - Guilherme G Silva
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil 13635-900
| | - Francisco P Rennó
- Department of Animal Nutrition and Animal Production, University of São Paulo, Pirassununga, Brazil 13635-900.
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Wang C, Liu Q, Guo G, Huo WJ, Wang YX, Zhang YL, Pei CX, Zhang SL. Effects of fibrolytic enzymes and isobutyrate on ruminal fermentation, microbial enzyme activity and cellulolytic bacteria in pre- and post-weaning dairy calves. ANIMAL PRODUCTION SCIENCE 2019. [DOI: 10.1071/an17270] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objective of the present study was to evaluate the effects of fibrolytic enzymes (FE, containing 160 units of cellulase and 4000 units of xylanase) or isobutyrate (IB) supplementation on ruminal fermentation, microbial enzyme activity and cellulolytic bacteria in dairy calves. Forty-eight Holstein bull calves of 15 days of age and of 44.9 ± 0.28 kg of BW were randomly assigned to four groups in a 2 × 2 factorial arrangement. Two levels of FE (0 g (FE–) or 1.83 g per calf per day (FE+)) and IB (0 g (IB–) or 6 g per calf per day (IB+)) were added. Calves were weaned at 60-day-old and four calves were selected from each treatment at random and slaughtered at 45 and 90 days of age. There was no IB × FE interaction effect. Ruminal pH decreased with IB or FE supplementation for post-weaned calves, whereas concentrations of total volatile fatty acids and acetate increased with IB or FE supplementation for pre- and post-weaned calves. Acetate to propionate ratio increased with IB supplementation, but was unaffected by FE supplementation. Ammonia-N concentration decreased with IB or FE supplementation for pre- and post-weaned calves. For post-weaned calves, activities of CMCase increased with IB or FE supplementation, and activities of cellobiase, xylanase, pectinase, β-amylase and protease increased with IB supplementation. Populations of B. fibrisolvens and F. succinogenes for pre- and post-weaned calves and R. flavefaciens for post-weaned calves increased with IB or FE supplementation. It is suggested that ruminal fermentation and growth performance of calves was improved with IB and FE supplementation, and the combination of IB and FE has the potential to stimulate the growth of pre- and post-weaned dairy calves.
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Refat B, Christensen DA, McKinnon JJ, Yang W, Beattie AD, McAllister TA, Eun JS, Abdel-Rahman GA, Yu P. Effect of fibrolytic enzymes on lactational performance, feeding behavior, and digestibility in high-producing dairy cows fed a barley silage–based diet. J Dairy Sci 2018; 101:7971-7979. [DOI: 10.3168/jds.2017-14203] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 05/05/2018] [Indexed: 12/14/2022]
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Song S, Chen G, Guo C, Rao K, Gao Y, Peng Z, Zhang Z, Bai X, Wang Y, Wang B, Chen Z, Fu X, Zhu W. Effects of exogenous fibrolytic enzyme supplementation to diets with different NFC/NDF ratios on the growth performance, nutrient digestibility and ruminal fermentation in Chinese domesticated black goats. Anim Feed Sci Technol 2018. [DOI: 10.1016/j.anifeedsci.2017.12.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Gandra J, Miranda G, Goes R, Takiya C, Del Valle T, Oliveira E, Freitas Junior J, Gandra E, Araki H, Santos A. Fibrolytic enzyme supplementation through ruminal bolus on eating behavior, nutrient digestibility and ruminal fermentation in Jersey heifers fed either corn silage- or sugarcane silage-based diets. Anim Feed Sci Technol 2017. [DOI: 10.1016/j.anifeedsci.2017.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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