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Singer M, Codron D, Lechner I, Rudnik R, Barboza P, Hummel J, Clauss M. The effect of size and density on the mean retention time of particles in reindeer (Rangifer tarandus). Comp Biochem Physiol A Mol Integr Physiol 2024; 292:111621. [PMID: 38452969 DOI: 10.1016/j.cbpa.2024.111621] [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: 02/15/2024] [Revised: 03/04/2024] [Accepted: 03/04/2024] [Indexed: 03/09/2024]
Abstract
Particle passage from the reticulorumen (RR) depends on particle density and size. A classic way of assessing these effects is the use of plastic markers of varying density and size that are recovered in the faeces. Here, we report results of an experiment where four fistulated reindeer (Rangifer tarandus, 96 ± 12 kg) were fed two different diets (browse, voluntary dry matter intake [DMI] 70 ± 10 g/kg0.75/d; or a pelleted diet, DMI 124 ± 52 g/kg0.75/d) and dosed via fistula with 8 different particle types combining densities of 1.03, 1.22 and 1.44 g/ml and sizes of 1, 10 and 20 mm. Generally, particles that passed the digestive tract intact (not ruminated) did so relatively early after marker dosing, and therefore had shorter mean retention times (MRT) than ruminated particles. On the higher intake, the overall mean retention time (MRT) of particles was shorter, but this was not an effect of shorter MRT for either intact or ruminated particles, but due to a higher proportion of intact particles at the higher intake. This supports the concept that ruminants do not adjust chewing behaviour depending on intake, but that a lower proportion of digesta is submitted to rumination due to pressure-driven escape from the forestomach at higher gut fills. Compared to cattle (Bos primigenius taurus), muskoxen (Ovibos moschatus) and moose (Alces alces) that had received the same markers, reindeer had a lower proportion of 1 mm particles that passed intact. Our results support the concept that the critical size threshold for particles leaving the ruminant forestomach is dependent on body size. While the results likely do not represent findings peculiar for reindeer, they indicate fundamental mechanisms operating in the forestomach of ruminants.
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Affiliation(s)
- Martina Singer
- Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057 Zurich, Switzerland.
| | - Daryl Codron
- Department of Zoology and Entomology, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa.
| | - Isabel Lechner
- Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057 Zurich, Switzerland.
| | - Rebecca Rudnik
- Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057 Zurich, Switzerland.
| | - Perry Barboza
- Institute of Arctic Biology and Department of Biology and Wildlife, University of Alaska Fairbanks, PO Box 756100, Fairbanks, AK, USA.
| | - Jürgen Hummel
- Ruminant Nutrition, Department of Animal Sciences, University of Goettingen, Kellnerweg 6, 37077 Goettingen, Germany.
| | - Marcus Clauss
- Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Winterthurerstr. 260, 8057 Zurich, Switzerland.
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Thorsteinsson M, Weisbjerg MR, Lund P, Bruhn A, Hellwing ALF, Nielsen MO. Effects of dietary inclusion of 3 Nordic brown macroalgae on enteric methane emission and productivity of dairy cows. J Dairy Sci 2023; 106:6921-6937. [PMID: 37641361 DOI: 10.3168/jds.2023-23437] [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: 03/01/2023] [Accepted: 05/19/2023] [Indexed: 08/31/2023]
Abstract
Macroalgae are receiving increased attention as antimethanogenic feed additives for cattle, but most in vivo studies are limited to investigating effects of the red macroalgae Asparagopsis spp. Hence, this study aimed to investigate the CH4 mitigating potential of 3 brown macroalgae from the Northern Hemisphere when fed to dairy cows, and to study the effects on feed intake, milk production, feed digestibility, and animal health indicators. The experiment was conducted as a 4 × 4 Latin square design using 4 lactating rumen, duodenal, and ileal cannulated Danish Holstein dairy cows. The cows were fed a total mixed ration (TMR) without any macroalgae or the same TMR diluted with, on a dry matter basis, either 4% ensiled Saccharina latissima, 4% Ascophyllum nodosum (NOD), or 2% Sargassum muticum (MUT). Each period consisted of 14 d of adaptation, 3 d of digesta and blood sampling, and 4 d of gas exchange measurements using respiration chambers. Milk yield and dry matter intake (DMI) were recorded daily. Blood was sampled on d 13 and 16 and analyzed for health status indicators. None of the 3 species affected the CH4 emission. Moreover, milk yield and DMI were also unaffected. Total-tract digestibility of crude protein was significantly lower for NOD compared with other diets, and additionally, the NOD diet also tended to reduce total-tract digestibility of neutral detergent fiber compared with MUT. Blood biomarkers did not indicate negative effects of the dietary inclusion of macroalgae on cow health. In conclusion, none of the 3 brown macroalgae reduced CH4 emission and did not affect DMI and milk production of dairy cows, whereas negative effects on the digestibility of nutrients were observed when A. nodosum was added. None of the diets would be allowed to be fed in commercial dairy herds due to high contents of iodine, cadmium, and arsenic.
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Affiliation(s)
- M Thorsteinsson
- Department of Animal and Veterinary Sciences, AU-Viborg, Research Centre Foulum, Aarhus University, DK-8830 Tjele, Denmark; iCLIMATE-Interdisciplinary Centre for Climate Change, Aarhus University, DK-8830 Tjele, Denmark; CBIO-Centre for Circular Bioeconomy, Aarhus University, DK-8830 Tjele, Denmark.
| | - M R Weisbjerg
- Department of Animal and Veterinary Sciences, AU-Viborg, Research Centre Foulum, Aarhus University, DK-8830 Tjele, Denmark; iCLIMATE-Interdisciplinary Centre for Climate Change, Aarhus University, DK-8830 Tjele, Denmark; CBIO-Centre for Circular Bioeconomy, Aarhus University, DK-8830 Tjele, Denmark
| | - P Lund
- Department of Animal and Veterinary Sciences, AU-Viborg, Research Centre Foulum, Aarhus University, DK-8830 Tjele, Denmark; iCLIMATE-Interdisciplinary Centre for Climate Change, Aarhus University, DK-8830 Tjele, Denmark; CBIO-Centre for Circular Bioeconomy, Aarhus University, DK-8830 Tjele, Denmark
| | - A Bruhn
- CBIO-Centre for Circular Bioeconomy, Aarhus University, DK-8830 Tjele, Denmark; Department of Ecoscience, Aarhus University, DK-8000 Aarhus C, Denmark
| | - A L F Hellwing
- Department of Animal and Veterinary Sciences, AU-Viborg, Research Centre Foulum, Aarhus University, DK-8830 Tjele, Denmark
| | - M O Nielsen
- Department of Animal and Veterinary Sciences, AU-Viborg, Research Centre Foulum, Aarhus University, DK-8830 Tjele, Denmark; iCLIMATE-Interdisciplinary Centre for Climate Change, Aarhus University, DK-8830 Tjele, Denmark
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Zhou J, Xue B, Hu A, Yue S, Wu M, Hong Q, Wu Y, Wang Z, Wang L, Peng Q, Xue B. Effect of dietary peNDF levels on digestibility and rumen fermentation, and microbial community in growing goats. Front Microbiol 2022; 13:950587. [PMID: 36090059 PMCID: PMC9453810 DOI: 10.3389/fmicb.2022.950587] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 07/28/2022] [Indexed: 11/13/2022] Open
Abstract
Physically effective neutral detergent fiber (peNDF) is a concept that accounts for the particle length of NDF in diets, sustaining the normal chewing behavior and rumen fermentation of ruminants. Specifically, peNDF>1.18 is the commonest one that is calculated from NDF and the percentage of feed dry matter left on the 1.18, 8.00, and 19.00 mm sieves. This study aimed to investigate the effects of different levels of peNDF>1.18 on the rumen microbiome and its correlation with nutrient digestibility and rumen fermentation in goats. A total of 30 Lezhi black goats were randomized and blocked to five dietary treatments (n = 6). All the diets were identical in composition but varied in hay lengths, leading to the different peNDF>1.18 content of the diets: 32.97, 29.93, 28.14, 26.48, and 24.75%. The results revealed that the nutrient digestibility increased when dietary peNDF>1.18 levels decreased from 32.97% to 28.14%, with the highest digestibility at 28.14% peNDF>1.18 treatment, after which nutrient digestibility decreased with the decreasing of dietary peNDF levels. Ruminal NH3-N concentrations in the 29.93% and 28.14% groups were higher than that in the 24.75% group (p < 0.05). Ruminal microbial protein concentration was the highest in the 32.97% group (p < 0.05). Daily CH4 production in the 32.97% and 24.75% peNDF>1.18 treatments was lower than that in the 26.48% group (p < 0.05) and no differences were observed among other groups. The relative abundance of rumen fungi at the phylum and genus levels and archaea at the species were affected by dietary peNDF>1.18 content. In conclusion, decreasing dietary peNDF>1.18 levels within a certain range can improve nutrient digestibility and change the rumen microbial community structure of goats. Dietary peNDF>1.18 level should be 28.14% (roughage length around 1 cm) among the five levels for 4 months Lezhi black goats with the purpose of optimal nutrient digestibility.
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Affiliation(s)
- Jia Zhou
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
| | - Benchu Xue
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
| | - Anhai Hu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
| | - Shuangming Yue
- Department of Bioengineering, Sichuan Water Conservancy College, Chengdu, China
| | - Mei Wu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
| | - Qionghua Hong
- Yunnan Animal Science and Veterinary Institute, Kunming, China
| | - Yuhan Wu
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
| | - Zhisheng Wang
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
| | - Lizhi Wang
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
| | - Quanhui Peng
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
| | - Bai Xue
- Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, China
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Xue B, Wu M, Yue S, Hu A, Li X, Hong Q, Wang Z, Wang L, Peng Q, Xue B. Changes in Rumen Bacterial Community Induced by the Dietary Physically Effective Neutral Detergent Fiber Levels in Goat Diets. Front Microbiol 2022; 13:820509. [PMID: 35479630 PMCID: PMC9035740 DOI: 10.3389/fmicb.2022.820509] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 02/14/2022] [Indexed: 01/03/2023] Open
Abstract
Physically effective neutral detergent fiber (peNDF) is a concept that accounts for the particle length of NDF in a feed, sustaining the normal chewing behavior and rumen fermentation of ruminants. This study aimed to elucidate the effects of dietary peNDF on growth performance and bacterial communities in the rumen of goats through a high-throughput sequencing technique. A total of 30 male Lezhi black goats were randomly assigned to five groups, corresponding to five diets with identical compositions and nutrient levels but with varying forage lengths (the peNDF1.18 contents of the diets were 33.0, 29.9, 28.1, 26.5, and 24.8%, respectively). The whole trial lasted for 44 days. As results show, feed intake and average daily gain were highest when peNDF1.18 content was 26.5%, in which the papilla length of the dorsal sac in rumen was the highest. Chao1 and ACE indexes were similar among the treatments, while Shannon and Simpson indexes of the peNDF1.18 = 28.1% group were the highest (p < 0.05). As the level of dietary peNDF1.18 decreased, the dominant phylum transitioned from Bacteroidetes to Firmicutes. The top three dominant genera of rumen bacteria were Prevotella 1, Ruminococcaceae NK4A214 group, and Christensenellaceae R-7 group. They all showed a quadratic correlation with dietary peNDF1.18 level (p < 0.05). The relative abundance of Ruminococcaceae UCG-011 was positively correlated, while that of Prevotella 1 was negatively correlated, with amino acid metabolism and energy metabolism (p < 0.01). In conclusion, dietary peNDF level influenced goat growth performance, rumen development, and rumen bacterial community structures, and a peNDF1.18 level between 26.5 and 28.1% was considered optimal for goat diet.
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Affiliation(s)
- Benchu Xue
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
| | - Mei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
| | - Shuangming Yue
- Department of Bioengineering, Sichuan Water Conservancy College, Chengdu, China
| | - Anhai Hu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
| | - Xiang Li
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
| | - Qionghua Hong
- Yunnan Academy of Animal Science and Veterinary Medicine, Kunming, China
| | - Zhisheng Wang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
| | - Lizhi Wang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
| | - Quanhui Peng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
| | - Bai Xue
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, China
- *Correspondence: Bai Xue,
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Survival of the nematophagous fungus Duddingtonia flagrans to in vitro segments of sheep gastrointestinal tract. Exp Parasitol 2021; 231:108172. [PMID: 34774533 DOI: 10.1016/j.exppara.2021.108172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 09/08/2021] [Accepted: 10/31/2021] [Indexed: 11/22/2022]
Abstract
The nematophagous fungus Duddingtonia flagrans is used in integrated management of gastrointestinal nematodes in ruminants. The chlamydospores of the fungus, orally administered, pass through the segments of the ruminant digestive tract and, in the feces, capture the nematodes preventing their migration to grasslands. The drastic conditions of the gastrointestinal segments can negatively affect the fungus' biocontrol activity. The aim of this study was to assess the effect of in vitro conditions of the sheep's main gastrointestinal segments on the concentration, viability and nematode predatory ability of D. flagrans chlamydospores. The segments evaluated separately in vitro were the oral cavity, rumen, abomasum, and small intestine. The results showed that chlamydospores concentration was not affected by exposure to the different segments. The viability of the chlamydospores after exposure to the oral cavity (2.53 × 106 CFU/mL) and small intestine (1.24 × 105 CFU/mL) was significantly lower than its control treatment, with values of 6.67 × 106 CFU/mL and 2.31 × 105 CFU/mL respectively. Nematode predatory ability after rumen exposure was reduced by 7% compared to the control treatment, by 25% after abomasum exposure and by 17% after small intestine. This study revealed the individual in vitro effect of each segment of ovine gastrointestinal tract on the integrity of this strain of the fungus D. flagrans affecting its viability and nematode predatory ability under the evaluated conditions. Delivery systems could be designed to protect chlamydospores considering the impact of each gastrointestinal segment.
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Characterization, Density and In Vitro Controlled Release Properties of Mimosa ( Acacia mearnsii) Tannin Encapsulated in Palm and Sunflower Oils. Animals (Basel) 2021; 11:ani11102919. [PMID: 34679938 PMCID: PMC8532746 DOI: 10.3390/ani11102919] [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: 08/25/2021] [Revised: 09/22/2021] [Accepted: 10/06/2021] [Indexed: 12/11/2022] Open
Abstract
Simple Summary The utilization of tannin in mitigating enteric methane suffers a setback in terms of dietary intake and digestibility because of the tannin’s astringency and instability in the gastrointestinal tract. Microencapsulation of tannin using lipids could mask its bitter taste and ensure its controlled release at the target site. This study aimed to encapsulate Acacia mearnsii tannin extract with palm and sunflower oils, and to evaluate the efficacy of the encapsulated tannins with regards to encapsulation efficiency, density, and release of tannin in media, simulating the rumen, abomasum and the small intestine. Mimosa tannin was encapsulated in palm oil or sunflower oil using a double emulsion method. The findings showed that encapsulated mimosa tannins in the palm oil and sunflower oil had high encapsulation efficiencies with smaller sizes and were lower in density compared to the unencapsulated mimosa tannin. The amount of tannins released by the unencapsulated tannin after 24 h in rumen (94%), abomasum (92%) and small intestine (96%) simulated buffers, were reduced to 24%, 21% and 19%, respectively, for the sunflower oil microparticle and 18%, 20% and 16%, respectively, for the palm oil microparticle in the same buffers and periods. Palm oil and sunflower oil successfully encapsulated the mimosa tannin and controlled its release in the gastrointestinal tract simulated media without compromising rumen fermentation. Abstract Tannin has gained wider acceptance as a dietary supplement in contemporary animal nutrition investigations because of its potential to reduce enteric methane emission. However, a major drawback to dietary tannin intake is the bitter taste and instability in the gastrointestinal tract (GIT). The utilization of fats as coating materials will ensure appropriate masking of the tannin’s aversive taste and its delivery to the target site. The aims of this study were to encapsulate mimosa tannin with palm oil or sunflower oil, and to assess the microcapsules in terms of encapsulation efficiency, morphology, density, and in vitro release of tannin in media simulating the rumen (pH 5.6), abomasum (pH 2.9) and small intestine (pH 7.4). The microencapsulation of mimosa tannin in palm or sunflower oils was accomplished using a double emulsion technique. The results revealed that encapsulated mimosa tannins in palm oil (EMTP) and sunflower oil (EMTS) had high yields (59% vs. 58%) and encapsulation efficiencies (70% vs. 68%), respectively. Compared to unencapsulated mimosa tannin (UMT), the morphology showed that the encapsulated tannins were smaller in size and spherical in shape. The UMT had (p < 0.01) higher particle density (1.44 g/cm3) compared to 1.22 g/cm3 and 1.21 g/cm3 for the EMTS and EMTP, respectively. The proportion of tannins released by the UMT after 24 h in the rumen (94%), abomasum (92%) and small intestine (96%) simulated buffers, reduced (p < 0.01) to 24%, 21% and 19% for the EMTS and 18%, 20% and 16% for the EMTP in similar media and timeframe. The release kinetics for the encapsulated tannins was slow and steady, thus, best fitted by the Higuchi model while the UMT dissolved quickly, hence, only fitted to a First order model. Sequential tannin release also indicated that the EMTS and EMTP were stable across the GIT. It was concluded that the microencapsulation of mimosa tannin in palm or sunflower oils stabilized tannins release in the GIT simulated buffers with the potential to modify rumen fermentation. Further studies should be conducted on the palm and sunflower oils microcapsules’ lipid stability, fatty acid transfer rate in the GIT and antioxidant properties of the encapsulated tannins.
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Li Y, Zhang GN, Feng GZ, Lv JY, Fang XP, Zhao C, Che L, Lan YX, Zhang YG. Effects of replacing alfalfa hay with malt sprouts and corn stover on milk production and nitrogen partitioning in dairy cows. Anim Feed Sci Technol 2020. [DOI: 10.1016/j.anifeedsci.2020.114701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Dufreneix F, Faverdin P, Peyraud JL. Influence of particle size and density on mean retention time in the rumen of dairy cows. J Dairy Sci 2019; 102:3010-3022. [DOI: 10.3168/jds.2018-15926] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 12/28/2018] [Indexed: 11/19/2022]
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9
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Li Y, Zhang GN, Xu HJ, Zhou S, Dou XJ, Lin C, Zhang XY, Zhao HB, Zhang YG. Effects of replacing alfalfa hay with Moringa oleifera leaves and peduncles on intake, digestibility, and rumen fermentation in dairy cows. Livest Sci 2019. [DOI: 10.1016/j.livsci.2019.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Monson ML, Dennis PM, Lukas KE, Krynak KL, Carrino-Kyker SR, Burke DJ, Schook MW. The effects of increased hay-to-grain ratio on behavior, metabolic health measures, and fecal bacterial communities in four Masai giraffe (Giraffa camelopardalis tippelskirchi) at Cleveland Metroparks Zoo. Zoo Biol 2018; 37:320-331. [PMID: 30070393 DOI: 10.1002/zoo.21434] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 06/13/2018] [Accepted: 07/10/2018] [Indexed: 11/06/2022]
Abstract
We evaluated whether increasing the hay-to-grain ratio offered to Masai giraffe (Giraffa camelopardalis tippelskirchi) at Cleveland Metroparks Zoo would reduce oral stereotypies and alter feeding behaviors, maintain or increase serum calcium-to-phosphorus ratio, decrease serum insulin-to-glucose ratio and salivary insulin, and alter fecal bacterial community structure. Giraffe transitioned to a ∼90:10 hay-to-grain ratio in even increments over 8 weeks. A ration balancer was added during the seventh week of transition to ensure proper mineral and nutrient balance. We collected (1) behavioral data collected approximately daily using instantaneous focal sampling; (2) serum collections every other week for insulin-to-glucose and calcium-to-phosphorus ratio analysis and saliva weekly for insulin analysis; and (3) weekly fecal sample collections to examine changes in bacterial community structure during the 8 weeks preceding and following the diet change. After the diet change, giraffe spent significantly more time feeding and less time performing tongue and mouth stereotypies, people-directed and alert behaviors. Salivary and serum insulin and serum insulin-to-glucose ratio decreased, and fecal bacterial community structure changed significantly. However, serum calcium-to-phosphorus ratio remained >1:1 throughout the study. While further studies are needed to elucidate the nature and implications of the change in fecal bacterial community structure and metabolic hormones, the results of this study show promise for incremental improvements in health and welfare from feeding a higher proportion of forage in the diet.
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Affiliation(s)
| | - Patricia M Dennis
- Cleveland Metroparks Zoo, Cleveland, Ohio.,The Ohio State University, Cleveland, Ohio
| | | | - Katherine L Krynak
- Case Western Reserve University, Cleveland, Ohio.,Ohio Northern University, Cleveland, Ohio
| | | | | | - Mandi W Schook
- Cleveland State University, Cleveland, Ohio.,Cleveland Metroparks Zoo, Cleveland, Ohio.,Disney's Animals Science and Environment, Bay Lake, Florida
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Caushi D, Martens H. Absorption of bicarbonate in sheep omasum. Res Vet Sci 2018; 118:324-330. [PMID: 29601970 DOI: 10.1016/j.rvsc.2018.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 03/07/2018] [Accepted: 03/09/2018] [Indexed: 10/17/2022]
Abstract
Transport of bicarbonate across the isolated epithelium of sheep omasum was studied in vitro in Ussing chambers in combination with the pH-Stat method. The transport of HCO3- occurred in both directions, but Jms HCO3- was significant larger than Jsm. Reducing the activity of the apical Na/H exchanger by a low mucosal Na concentration caused a significant reduction of Jms HCO3-. Mucosal amiloride or short chain fatty acids (25 mmol l-1 SCFA) numerically decreased Jms HCO3-, but their combination (amiloride + SCFA) caused a significant reduction, which was also observed after addition of the carboanhydrase inhibitor ethoxyzolamide. Concentrations of 5 or 15 mmol·l-1 mucosal ammonia did not change transport rates. The obtained results indicate the importance of an undisturbed cytosolic pH for transcellular HCO3- transport, which is probably mediated by an anion exchanger in both the apical and basolateral membranes. Possible impairment of HCO3- transport appears to be an overlooked factor in the pathogenesis of displacement of the abomasum.
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Affiliation(s)
- Driton Caushi
- Freie Universitaet Berlin, Department of Veterinary Physiology, Oertzenweg 19b, 14163 Berlin, Germany.
| | - Holger Martens
- Freie Universitaet Berlin, Department of Veterinary Physiology, Oertzenweg 19b, 14163 Berlin, Germany.
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Clukey KE, Lepczyk CA, Balazs GH, Work TM, Lynch JM. Investigation of plastic debris ingestion by four species of sea turtles collected as bycatch in pelagic Pacific longline fisheries. MARINE POLLUTION BULLETIN 2017; 120:117-125. [PMID: 28487057 DOI: 10.1016/j.marpolbul.2017.04.064] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/29/2017] [Accepted: 04/29/2017] [Indexed: 05/29/2023]
Abstract
Ingestion of marine debris is an established threat to sea turtles. The amount, type, color and location of ingested plastics in the gastrointestinal tracts of 55 sea turtles from Pacific longline fisheries from 2012 to 2016 were quantified, and compared across species, turtle length, body condition, sex, capture location, season and year. Six approaches for quantifying amounts of ingested plastic strongly correlated with one another and included: number of pieces, mass, volume and surface area of plastics, ratio of plastic mass to body mass, and percentage of the mass of gut contents consisting of plastic. All olive ridley (n=37), 90% of green (n=10), 80% of loggerhead (n=5) and 0% of leatherback (n=3) turtles had ingested plastic; green turtles ingested significantly more than olive ridleys. Most debris was in the large intestines. No adverse health impacts (intestinal lesions, blockage, or poor body condition) due directly to plastic ingestion were noted.
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Affiliation(s)
- Katharine E Clukey
- Department of Natural Resources and Environmental Management, University of Hawai'i at Mānoa, Honolulu, HI, United States
| | - Christopher A Lepczyk
- Department of Natural Resources and Environmental Management, University of Hawai'i at Mānoa, Honolulu, HI, United States; Auburn University, School of Forestry and Wildlife Science, Auburn, AL, United States
| | - George H Balazs
- Pacific Islands Fisheries Science Center, National Marine Fisheries Service, Honolulu, HI, United States
| | - Thierry M Work
- National Wildlife Health Center, Honolulu Field Station, U.S. Geological Survey, Honolulu, HI, United States
| | - Jennifer M Lynch
- Chemical Sciences Division, National Institute of Standards and Technology, Kaneohe, HI, United States.
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Hao X, Gao H, Wang X, Zhang G, Zhang Y. Replacing alfalfa hay with dry corn gluten feed and Chinese wild rye grass: Effects on rumen fermentation, rumen microbial protein synthesis, and lactation performance in lactating dairy cows. J Dairy Sci 2017; 100:2672-2681. [DOI: 10.3168/jds.2016-11645] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 12/30/2016] [Indexed: 11/19/2022]
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15
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Rabišková M, Třináctý J, Sýkora T, Doležal P. Post-ruminal delivery systems. ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS 2015. [DOI: 10.11118/actaun200452020143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Lauper M, Lechner I, Barboza PS, Collins WB, Hummel J, Codron D, Clauss M. Rumination of different-sized particles in muskoxen (Ovibos moschatus) and moose (Alces alces) on grass and browse diets, and implications for rumination in different ruminant feeding types. Mamm Biol 2013. [DOI: 10.1016/j.mambio.2012.06.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chaji M, Naserian A, Valizadeh R, Mohammadabadi T. The influence of steam treated sugarcane pith on digestibility, rumen passage rate and fermentation of Iranian Baluchi sheep. JOURNAL OF APPLIED ANIMAL RESEARCH 2012. [DOI: 10.1080/09712119.2012.658058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Schadt I, Ferguson J, Azzaro G, Petriglieri R, Caccamo M, Van Soest P, Licitra G. How do dairy cows chew?—Particle size analysis of selected feeds with different particle length distributions and of respective ingested bolus particles. J Dairy Sci 2012; 95:4707-20. [DOI: 10.3168/jds.2011-5118] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Accepted: 03/25/2012] [Indexed: 11/19/2022]
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Grain source and marginal changes in forage particle size modulate digestive processes and nutrient intake of dairy cows. Animal 2012; 6:1237-45. [DOI: 10.1017/s1751731112000122] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Hook S, Dijkstra J, Wright AD, McBride B, France J. Modeling the distribution of ciliate protozoa in the reticulo-rumen using linear programming. J Dairy Sci 2012; 95:255-65. [DOI: 10.3168/jds.2011-4352] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 09/25/2011] [Indexed: 11/19/2022]
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The effect of size and density on the mean retention time of particles in the reticulorumen of cattle ( Bos primigenius f. taurus), muskoxen ( Ovibos moschatus) and moose ( Alces alces). Br J Nutr 2010; 105:634-44. [PMID: 21144130 DOI: 10.1017/s0007114510004101] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Particle passage from the reticulorumen (RR) depends on particle density and size. Forage particle density and size are related and change over time in the RR. Particle density mainly influences sorting in the reticulum, whereas particle size influences particle retention in the fibre mat of stratified rumen contents ('filter-bed' effect). We investigated these effects independently, by inserting plastic particles of different sizes (1, 10 and 20 mm) and densities (1·03, 1·20 and 1·44 mg/ml) in the RR of cattle (Bos primigenius f. taurus) as a pilot study, and of muskoxen (Ovibos moschatus; n 4) and moose (Alces alces; n 2) both fed two diets (browse and grass). Faeces were analysed for plastic residues for 13 d after dosing to calculate mean retention times (MRT). The results confirmed previous findings of differences in absolute MRT between species. Comparing muskoxen with moose, there was no difference in the effect of particle density on the MRT between species but particle size had a more pronounced effect on the MRT in muskoxen than in moose. This indicated a stronger 'filter-bed effect' in muskoxen, in accord with the reports of stratified RR contents in this species v. the absence of RR content stratification in moose. Low-density particles were retained longer in both species fed on grass diets, indicating a contribution of forage type to the 'filter-bed effect'. The results indicate that retention based on particle size may differ between ruminant species, depending on the presence of a fibre mat in the RR, whereas the density-dependent mechanism of sedimentation in the RR is rather constant across species.
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Mullins C, Grigsby K, Anderson D, Titgemeyer E, Bradford B. Effects of feeding increasing levels of wet corn gluten feed on production and ruminal fermentation in lactating dairy cows. J Dairy Sci 2010; 93:5329-37. [DOI: 10.3168/jds.2010-3310] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Accepted: 08/04/2010] [Indexed: 11/19/2022]
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Seo S, Lanzas C, Tedeschi L, Pell A, Fox D. Development of a mechanistic model to represent the dynamics of particle flow out of the rumen and to predict rate of passage of forage particles in dairy cattle. J Dairy Sci 2009; 92:3981-4000. [DOI: 10.3168/jds.2006-799] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hummel J, Südekum KH, Bayer D, Ortmann S, Streich WJ, Hatt JM, Clauss M. Physical characteristics of reticuloruminal contents of oxen in relation to forage type and time after feeding. J Anim Physiol Anim Nutr (Berl) 2009; 93:209-20. [DOI: 10.1111/j.1439-0396.2008.00806.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Effect of particle size of alfalfa hay and reconstitution with water on intake, digestion and milk production in Holstein dairy cows. Animal 2009; 3:218-27. [DOI: 10.1017/s1751731108003546] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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26
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Schwarm A, Ortmann S, Wolf C, Jürgen Streich W, Clauss M. Excretion patterns of fluid and different sized particle passage markers in banteng (Bos javanicus) and pygmy hippopotamus (Hexaprotodon liberiensis): Two functionally different foregut fermenters. Comp Biochem Physiol A Mol Integr Physiol 2008; 150:32-9. [DOI: 10.1016/j.cbpa.2008.02.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2007] [Revised: 02/22/2008] [Accepted: 02/22/2008] [Indexed: 11/26/2022]
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Castillo-Alcala F, Wilson PR, Molenaar R, Lopez-Villalobos N. Efficacy, distribution and faecal excretion of copper oxide wire particles in a novel bolus in red deer (Cervus elaphus). N Z Vet J 2007; 55:81-6. [PMID: 17410215 DOI: 10.1080/00480169.2007.36746] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AIM To determine the efficacy of a novel copper oxide wire particle (COWP) formulation in elevating concentrations of copper (Cu) in the liver and serum of red deer (Cervus elaphus), and to investigate the distribution of particles in the gastrointestinal tract and the rate of their excretion in faeces. METHODS Mixed-age red deer hinds were allocated to three groups (n=10 per group) on the basis of pre-treatment liver Cu concentrations. Groups 1 and 2 were treated orally with a 10-g COWP bolus on Days 0 and 30, respectively, while the remaining group served as an untreated control. Animals were slaughtered on Day 60, when blood and liver samples were collected for determination of Cu concentrations. An additional group of 18-month-old red deer hinds (n=20) were treated orally with a 10-g COWP bolus, and four were slaughtered on each of Days 1, 5, 15, 30 and 60 after treatment. The gastrointestinal tract was secured between compartments below the oesophagus and contents rinsed until sedimentation of particles was complete. The sediment was oven-dried and COWP were separated and weighed. Faeces were collected continuously from four additional animals held in metabolism cages for 4 days after treatment, sub-sampled daily, and COWP recovered. RESULTS Mean liver Cu concentrations at slaughter were 80, 597 and 447 micromol/kg for controls and hinds treated 30, and 60 days previously, respectively. Corresponding mean serum Cu concentrations were 7.7, 12.9 and 11.9 micromol/L, respectively. Liver and serum Cu concentrations were higher in both treatment groups than in untreated control animals (p<0.001). COWP were found in all compartments of the gastrointestinal tract measured, for at least 15 days, and in the rumen/reticulum and abomasum for at least 60 days post-administration. The highest rate of recovery overall was from the rumen/reticulum. Mean weight of COWP recovered from faeces was 0.09 g during the first 24 h and 0.94 g over the first 4 days following administration. CONCLUSION The COWP bolus tested resulted in elevated mean liver Cu concentrations for at least 60 days compared with control animals. The majority of COWP were found in the rumen/ reticulum, where recovery was possible for at least 60 days. About 10% of particle weight was excreted in the faeces within 4 days of administration. CLINICAL SIGNIFICANCE The test bolus was efficacious in deer, elevating mean liver and serum Cu concentrations 30 and 60 days after treatment. Variation in faecal excretion may explain between-animal differences in efficacy.
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Affiliation(s)
- F Castillo-Alcala
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand
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Lund P, Weisbjerg M, Hvelplund T. Passage kinetics of fibre in dairy cows obtained from duodenal and faecal ytterbium excretion. Anim Feed Sci Technol 2006. [DOI: 10.1016/j.anifeedsci.2005.10.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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von Engelhardt W, Haarmeyer P, Kaske M, Lechner-Doll M. Chewing activities and oesophageal motility during feed intake, rumination and eructation in camels. J Comp Physiol B 2005; 176:117-24. [PMID: 16328535 DOI: 10.1007/s00360-005-0027-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2005] [Revised: 07/22/2005] [Accepted: 08/10/2005] [Indexed: 11/26/2022]
Abstract
It was the aim of this study to characterize rumination behaviour, eructation and oesophageal motility in camels to identify similarities and differences between camels and domestic ruminants. Recordings were carried out in five camels fed on a hay-based diet. On an average, the duration of rumination, feeding and resting was 8.3, 5.6 and 10.1 h per 24 h, respectively. Rumination activity peaked in the morning between 9:00 and 11:00 and in the night between 02:00 and 04:00 a.m. During rumination periods, on an average 67 boluses were regurgitated per hour. Each bolus was chewed for an average of 45 s with 68 chews per min. The pause between two rumination cycles lasted on an average 9 s. Hay intake took 61 min/kg dry matter (DM), rumination lasted 71 min/kg DM of hay consumed. The regurgitation of a bolus started with a contraction of cranial compartment 1 (C 1) during a B-sequence, followed by a deep inspiration with closed glottis. Digesta enters the oesophagus, and an antiperistaltic wave transported the bolus orally. Eructation starts with a contraction of the caudal C1 during a B-sequence when the cranial C1 is relaxed. After entering the oesophagus, a rapid antiperistaltic wave transports the gas orally. Results revealed that the parameter values obtained in the camels were remarkably similar to those in domestic ruminants despite profound morphological differences and different patterns of forestomach motility.
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Affiliation(s)
- W von Engelhardt
- Department of Physiology, School of Veterinary Medicine, Bischofsholer Damm 15/102, 30173, Hannover, Germany.
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Teimouri Yansari A, Valizadeh R, Naserian A, Christensen D, Yu P, Eftekhari Shahroodi F. Effects of Alfalfa Particle Size and Specific Gravity on Chewing Activity, Digestibility, and Performance of Holstein Dairy Cows. J Dairy Sci 2004; 87:3912-24. [DOI: 10.3168/jds.s0022-0302(04)73530-4] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hristov AN, Ahvenjarvi S, McAllister TA, Huhtanen P. Composition and digestive tract retention time of ruminal particles with functional specific gravity greater or less than 1.021. J Anim Sci 2003; 81:2639-48. [PMID: 14552393 DOI: 10.2527/2003.81102639x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The objective of this study was to determine composition, particle size distribution, and in vivo kinetics of ruminal particles having functional specific gravity (FSG) greater or less than FSG of particles found in the omasum and reticulum of lactating dairy cows. Particles from the reticulum and the omasal had FSG of 1.03 and 1.02, respectively. Particles from ruminal contents with FSG higher (HP) or lower (LP) than 1.02 were isolated and labeled with Er or Dy, respectively. Four ruminally cannulated, lactating Ayrshire dairy cows were fed all-grass silage (AS) or 54% grass silage:46% concentrate (SC) diets in a cross-over design trial and used to study chemical composition and ruminal and total tract kinetics of HP and LP. Labeled particles were pulse dosed into the rumen of the cows and disappearance of the markers from ruminal HP and LP pools and excretion in feces was monitored for 72 and 120 h, respectively. Fecal marker excretion data were fitted using two-compartment mathematical age-dependent/age-independent (Gn-->G1) models. Inclusion of concentrate in the diet (SC) increased (P < 0.05) apparent total tract digestibility of dietary DM, OM and N. Digestibility of fiber fractions, NDF and ADF, was lower (P < 0.01 and P < 0.05, respectively) for SC compared with AS. The heavy particles had higher (P < 0.01) indigestible NDF and lower (P < 0.01) N concentration than LP. Particles from the HP pool passed from the rumen more rapidly (P < 0.01) than particles from LP (0.044 and 0.019 h(-1), respectively). Diet had no effect on particle rate of disappearance or pool size in the rumen. Across diets, pool size of LP was consistently larger (P < 0.05) than that of HP. Diet had no effect on total tract mean retention time (MRT) of LP or HP. Total tract MRT of LP was greater (P < 0.05) than MRT of HP (59.6 vs. 49.0 h, respectively). Results from this study support the hypothesis that functional specific gravity is an important factor determining the rate of outflow and residence time of feed particles within the reticulo-rumen and total digestive tract. Our data indicate that digesta particles with functional specific gravity greater or less than 1.02 have different composition and flow characteristics. Heavier particles contain more indigestible fiber and less N and are likely depleted of substrate available for microbial fermentation, are smaller in size, and have a higher passage rate/shorter retention time in the digestive tract than lighter particles.
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Affiliation(s)
- A N Hristov
- Department of Animal and Veterinary Science, University of Idaho, Moscow 83844-2330, USA.
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Boddugari K, Grant RJ, Stock R, Lewis M. Maximal replacement of forage and concentrate with a new wet corn milling product for lactating dairy cows. J Dairy Sci 2001; 84:873-84. [PMID: 11352164 DOI: 10.3168/jds.s0022-0302(01)74545-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Three experiments were conducted to determine the maximal amount of concentrate and forage that could be replaced with a new wet corn milling product. The corn milling product contained 23.1% crude protein, 9.9% ruminally undegradable protein, 13.7% acid detergent fiber, 40.3% neutral detergent fiber, and 2.6% ether extract (% of dry matter; DM). In experiment 1, 16 Holstein cows were assigned to one of four diets in a replicated 4 x 4 Latin square design with 28-d periods. The four diets contained 54.3% forage (alfalfa:corn silages, 1:1 DM basis) with the wet corn milling product replacing 0, 50, 75, or 100% of the concentrate portion (corn and soybean meal) of the diet (DM basis). The diets containing wet corn milling product resulted in 7.8% lower DM intake, equivalent milk production (28.5 kg/d), and 13.6% greater efficiency of 4% fat-corrected milk (FCM) production than the control diet. There was no effect of diet on ruminal pH. In experiment 2, 16 Holstein cows were assigned to one of four diets in a replicated 4 x 4 Latin square design with 28-d periods. The 100% concentrate replacement diet from experiment 1 was used as control diet. For the test diets, forage was replaced with 15, 30, or 45% of the corn milling product (DM basis). Efficiency of FCM production (1.16) was not affected by diet. Rumination time was reduced for the 30 and 45% forage replacement diets, but ruminal pH was unaffected. In experiment 3, 30 Holstein cows were assigned at parturition to either a control diet (no corn milling product) or a diet containing 40% corn milling feed in place of both forage and concentrate (optimal levels from experiments 1 and 2) for 9 wk. The diet containing corn milling feed resulted in 21% greater efficiency of FCM production than the control diet. These results indicate that a new feed product based on wet corn milling ingredients has the potential to effectively replace all of the concentrate and up to 45% of the forage in the diet for lactating dairy cows.
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Affiliation(s)
- K Boddugari
- Department of Animal Science, University of Nebraska, Lincoln 68583-0908, USA
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Dhanoa MS, Lopez S, Dijkstra J, Davies DR, Sanderson R, Williams BA, Sileshi Z, France J. Estimating the extent of degradation of ruminant feeds from a description of their gas production profiles observed in vitro: comparison of models. Br J Nutr 2000; 83:131-42. [PMID: 10743492 DOI: 10.1017/s0007114500000179] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
An evaluation of general models that describe gas production profiles is presented. The models are derived from first principles by considering a simple three-pool scheme and permit the extent of ruminal degradation to be calculated, as described in the companion paper. The models evaluated were the generalized Mitscherlich, simple Mitscherlich, generalized Michaelis-Menten, simple Michaelis-Menten, Gompertz, and logistic. Five sets of gas production data consisting of 216 curves, obtained using a wide range of feeds (including straw, hay, silage, grain and various byproducts), were analysed to study the performance of these gas production models. Application of the non-sigmoidal models (simple Mitscherlich and Michaelis-Menten) to the data resulted in convergence problems and these models were found to be inadequate in many cases. Based on results of a pairwise comparison between models (variance ratio test), ranking of residual mean squares, lack-of-fit test, and of analyses of residuals, the generalized Mitscherlich and the generalized Michaelis-Menten models seemed particularly suited because of their flexibility to encompass sigmoidal and non-sigmoidal shapes of gas production profiles, whether symmetrical or not.
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Affiliation(s)
- M S Dhanoa
- Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, UK
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Allen DM, Grant RJ. Interactions between forage and wet corn gluten feed as sources of fiber in diets for lactating dairy cows. J Dairy Sci 2000; 83:322-31. [PMID: 10714868 DOI: 10.3168/jds.s0022-0302(00)74882-x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Twelve early lactation Holstein cows (4 fistulated) were used in replicated 4x4 Latin squares with 4-wk periods to determine the effective neutral detergent fiber (NDF) content of wet corn gluten feed and to measure the effect of forage particle size on ruminal mat consistency and passage rate of wet corn gluten feed. Diets were 1) 23.3% NDF (17.4 percentage units of NDF from alfalfa silage), 2) diet 1 plus 11.1 additional percentage units of NDF from alfalfa silage, 3) diet 1 plus 10.7 percentage units of NDF from wet corn gluten feed, and 4) 8.6 percentage units of NDF from alfalfa silage plus 8.9 percentage units of NDF from coarsely chopped alfalfa hay and 10.7 percentage units of NDF from wet corn gluten feed. The calculated effective NDF factor for wet corn gluten feed, using change in milk fat concentration per unit change in NDF, was 0.74 compared with an assumed 1.0 for alfalfa silage. Rumination activity was measured to calculate a physically effective NDF factor for wet corn gluten feed, which was only 0.11 compared with 1.0 for alfalfa silage. Physically effective NDF also was determined for wet corn gluten feed by wet sieving; 22% of the particles were retained on the 3.35-mm screen or greater. Ruminal mat consistency increased and passage rate of wet corn gluten feed decreased with added hay. The inclusion of chopped alfalfa hay to a diet containing wet corn gluten feed increased ruminal mat consistency, rumination activity, and slowed passage rate, resulting in greater ruminal digestion of NDF from wet corn gluten feed. Depending on the response variable, the effectiveness of NDF from wet corn gluten feed varied from 0.11 to 0.74.
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Affiliation(s)
- D M Allen
- Department of Animal Science, University of Nebraska, Lincoln 68583-0908, USA
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Solid and fluid passage rate in buffalo, cattle and sheep fed diets with different forage to concentrate ratios. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0301-6226(97)00132-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Rothfuss H, Südekum KH, Stangassinger M. [Determination of the passage of two markers in the gastrointestinal tract of steers using different evaluation methods: effect of the level of nutrition]. ARCHIV FUR TIERERNAHRUNG 1997; 50:283-300. [PMID: 9341094 DOI: 10.1080/17450399709386139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This study was conducted to investigate the effects of amount of intake of a mixed diet by steers on the passage of digesta through the reticulorumen and the whole digestive tract. Six ruminally cannulated steers received a mixed diet consisting on average of 43% grass silage, 25% maize silage, 30% concentrate and 2% mineral-vitamin mix in DM. The experimental design was a repeated 3 x 3 Latin square with 21 days periods. The diet was offered twice daily (07.00 and 19.00 h) at 1, 1.5 and 2 times of estimated maintenance energy requirements. At the beginning of each period, animals received pulse doses of Titanium(IV)-oxide (TiO2) per os and Cr-EDTA intraruminally. Following marker administration, faecal marker concentrations were determined over 120 h. Passage parameters were estimated by a mono-exponential and a bi-exponential model, by models including gamma age-dependency and by a model calculating total tract mean retention time as mean value of all points on the marker-excretion curve. Passage rate of TiO2 from the reticulorumen increased with higher intakes, whereas mean retention time in the whole tract decreased. In general, results of different models were consistent across intakes. Values for passage of TiO2 were in good agreement with those reported for small particles, when similar diets were fed to cattle. Rate of passage of Cr-EDTA from the reticulorumen increased with higher intakes, and mean retention times of Cr-EDTA in the reticulorumen and in the whole tract decreased. Differences between models with or without age dependency were greater for Cr-EDTA than for TiO2. Fit to Cr-EDTA excretion curves was not satisfactory for models with gamma age dependency. Irrespective of model and marker, passage from the reticulorumen accelerated markedly, whereas retention times in the reticulorumen and in the whole tract decreased, as intake increased from maintenance energy requirements to 1.5 times maintenance.
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Affiliation(s)
- H Rothfuss
- Institut für Tierernährung und Stoffwechselphysiologie, Christian-Albrechts-Universität Kiel, Germany
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37
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Rothfuss H, Südekum KH, Stangassinger M. [Estimation of marker passage in the digestive tract of dairy cows by different models: influence of stage of lactation, amount of intake and diet composition]. ARCHIV FUR TIERERNAHRUNG 1997; 50:43-61. [PMID: 9304387 DOI: 10.1080/17450399709386118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
12 dairy cows were used to examine the influence of stage of lactation, amount of intake and diet composition on digesta passage from the reticulorumen. Cows were fed on mixed diets, containing on average 34% concentrate and 66% roughage (dry matter basis). The roughage portion consisted of maize silage and either extensively or intensively produced grass silage in the ratio of 40:60 (% as fed). Titanium(IV)-oxide (TiO2) was used as a marker and faecal marker concentrations were determined for 120 h after oral dosing. Samples were taken in four periods-ante partum (1 period) and in the first half of lactation (3 periods)-, each period representing a certain physiological state. Cows were fed according to milk yield with mean dry matter intakes of 12.0, 16.8, 22.6 and 21.2 kg in periods 1 to 4. Passage parameters were estimated by a model with gamma time-dependency (G4G1), by an exponential model and by a model calculating total tract mean retention time as mean value of all points on the marker-excretion curve. Results showed an obvious acceleration of marker passage from the reticulorumen from ante partum to post partum. Total tract mean retention time calculated as mean values of all points on the marker excretion-curves were in good agreement with total tract mean retention times calculated with G4G1. Passage rates from the reticulorumen showed poor agreement between G4G1 and the exponential model. Effects of period and diet past partum were observed for rate of passage from and mean retention time in the fast compartment only, both estimated by G4G1. TiO2 appears to be a suitable marker to estimate passage rates. Values for passage rates were in the range of those reported for concentrate particles by others.
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Affiliation(s)
- H Rothfuss
- Institut für Tierernährung und Stoffwechselphysiologie, Christian-Albrechts-Universität, Kiel, Germany
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Abstract
Source, amount, and physical characteristics of dietary forage can interact with nonforage fiber sources and influence ruminal and total tract fiber digestion, passage, and performance of dairy cows fed diets containing substantial nonforage fiber in place of forage. Dietary NDF from forage can be reduced to < = 60% and still provide sufficient amounts of effective fiber for FCM production that is similar to or superior to that with high forage diets. Because of small particle size and high specific gravity, increased ruminal rate of passage may be responsible for lower ruminal NDF digestibility of nonforage fiber sources fed at high dietary amounts. As the amount of soybean hulls increased from 50 to 95% of a pelleted mix for dairy cows, passage rate increased by 8%. In five studies, the digestion of soybean hull diets was improved by the addition of coarse forage. Fiber digestibility might have improved because coarse hay increased ruminal retention time of nonforage fiber sources and allowed more complete digestion. Addition of coarsely chopped alfalfa hay to diets based on silage containing 25% soybean hulls increased ruminal mat consistency by 49% and tended to slow the ruminal escape rate of soybean hulls by 16%. When high percentage of nonforage fiber are fed, the amount of dietary forage is necessarily low, and forage particle size should be adequate to stimulate rumination and entrap small feed particles. The amount and particle size of forage in the diet interacts with the substituted nonforage fiber source to determine the net impact on the rate of ruminal digestion and passage of nonforage fiber.
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Affiliation(s)
- R J Grant
- Department of Animal Science, University of Nebraska, Lincoin 68583-0908, USA
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Kaske M, Midasch A. Effects of experimentally-impaired reticular contractions on digesta passage in sheep. Br J Nutr 1997; 78:97-110. [PMID: 9292763 DOI: 10.1079/bjn19970122] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The aim of the study was to evaluate the functional role of reticular contractions for digesta passage in sheep. Feed intake, mean retention time of fluid and plastic particles in the reticulo-rumen, rumen fluid volume, forestomach motility and particle size distribution in the faeces were determined in five rumen-fistulated sheep fed on hay ad libitum (Expt 1). The same variables were determined when reticular movements were impaired for 10 d by introducing a silicone-covered lead weight (500 g) into the reticulum (Expt 2). As feed intake dropped in Expt 2 by 27% compared with Expt 1, the sheep received in an additional experiment exactly the amount of feed which had been consumed during Expt 2 and measurements were repeated without impairing reticular movements (Expt 3). The introduction of the weight did not affect the frequency of A- or B-cycles, but elevation of the reticular floor in a cranio-dorsal direction during the biphasic contraction was markedly reduced. The pattern of marker excretion indicated a drastically changed composition of reticular outflow in Expt 2 compared with Expts 1 and 3. During Expt 2, rumen fluid volume was similar to that in Expt 1 but about 25% higher than that in Expt 3; the amount of large feed particles in the faeces was increased compared with Expt 1 (+49%) and Expt 3 (+76%). In at least two sheep, abomasal emptying was inhibited during Expt 2, as indicated by an enlarged impacted abomasum. In conclusion, the results emphasize the central role of reticular motility for the separation of particles in the forestomach, the outflow of digesta from the reticulo-rumen and transpyloric digesta flow.
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Affiliation(s)
- M Kaske
- Department of Physiology, School of Veterinary Medicine, Hannover, Germany
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Abstract
Sixteen Holstein cows in midlactation were used in a design based on a replicated 4 x 4 Latin square with the last period removed to determine the influence of particle size of beet pulp neutral detergent fiber (NDF) on its effectiveness as a replacement for alfalfa NDF. Diets were a low forage, low fiber diet [12.1 g of alfalfa NDF/100 g of dry matter (DM)], a normal forage diet (low forage plus 7.8 g of additional alfalfa NDF/100 g of DM), and two low forage diets with 5.3 g of NDF/100 g of DM from either whole or finely ground dried sugar beet pulp. Replacement of alfalfa fiber with beet pulp fiber increased milk protein yield because of the tendencies toward increased milk yield and protein concentration. However, milk fat concentration and yield were unaffected. The addition of beet pulp fiber, either whole or ground, to the basal low forage, low fiber diet did not affect yields of milk, protein, or fat, but milk protein concentration tended to be lower for cows fed the beet pulp diets than for cows fed the basal diet. Reducing the particle size of beet pulp increased DM intake but did not affect any of the milk yield measurements. Particle size reduction of beet pulp did not reduce its effectiveness as a fiber source as measured by changes in milk fat content.
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Affiliation(s)
- P W Clark
- Department of Animal and Food Science, University of Wisconsin, River Falls 54022-5001, USA
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Kaske M, Midasch A, Rehage J. Sonographic investigation of reticular contractions in healthy sheep, cows and goats and in cows with traumatic reticulo-peritonitis. ZENTRALBLATT FUR VETERINARMEDIZIN. REIHE A 1994; 41:748-56. [PMID: 7653113 DOI: 10.1111/j.1439-0442.1994.tb00145.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The objective of the study was (a) to compare sonographically the sequence of reticular contractions between grass and roughage eaters (cows, sheep) and intermediate feeders (goats) and (b) to check whether sonography may be useful for the investigation of cattle with a history of traumatic reticulo-peritonitis (TRP). All animals were investigated from the left ventral Regio parachondriaca with a 2.5 MHz sector scanner. Reticular contractions were recorded on video and evaluated later on. Duration of the contractions was found to be surprisingly uniform between individuals of the investigated species. However, in cattle and sheep the reticular floor moves over longer distances during both contractions in cranio-dorsal direction compared to goats, i.e. the velocity with which the reticulum contracts was markedly higher in sheep (5.3 +/- 1.4 cm* s-1) and cows (4.4 +/- 2.0) than in goats (2.1 +/- 0.9). Thus, in sheep and cattle feed particles are transported with a higher force in caudo-dorsal direction resulting in a longer retention time of particles in the reticulorumen than in goats. Sonographic investigation of eight cows with clinical symptoms of acute TRP indicated that sonography is a valuable method for the diagnosis of TRP. Implications of sonographic signs for the clinical course in such patients are discussed.
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Affiliation(s)
- M Kaske
- Department of Physiology, School of Veterinary Medicine, Hannover, Germany
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Ramanzin M, Bailoni L, Bittante G. Solubility, Water-Holding Capacity, and Specific Gravity of Different Concentrates. J Dairy Sci 1994. [DOI: 10.3168/jds.s0022-0302(94)77012-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Weidner SJ, Grant RJ. Altered ruminal mat consistency by high percentages of soybean hulls fed to lactating dairy cows. J Dairy Sci 1994; 77:522-32. [PMID: 8182176 DOI: 10.3168/jds.s0022-0302(94)76980-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Three ruminally fistulated dairy cows in early lactation were used in a 3 x 3 Latin square design with 3-wk periods to investigate the effects of alteration of ruminal mat consistency on ruminal function and soybean hull rate of passage. The control diet consisted of 60% forage (alfalfa:corn silages, 1:1, dry basis) and no soybean hulls. Replacement of 40% of the silage mixture with soybean hulls decreased ruminal mat consistency by 57% at 6 h postfeeding and reduced rumination activity 52%, ruminal pH 6%, and acetate:propionate ratio observed over 24 h by 10% compared with the control diet. Replacement of 75% of the silage with 25% soybean hulls combined with 20% coarsely chopped alfalfa hay increased ruminal mat consistency by 49% at 2 and 6 h postfeeding, increased the percentage of large particles (> or = 9.50 mm) retained in the dorsal rumen, and significantly increased ruminal pH 1.5% and acetate:propionate ratio by 17% compared with the diet of 25% soybean hulls without alfalfa hay. Increasing the ruminal mat consistency with coarsely chopped alfalfa hay did not significantly decrease the rate of escape of soybean hulls from the rumen, but addition of alfalfa hay increased 4% FCM 4.8 kg/d compared with FCM of diets containing 25% soybean hulls without alfalfa hay.
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Affiliation(s)
- S J Weidner
- Department of Animal Sciences, University of Nebraska, Lincoln 68583-0908
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Ferlay A, Doreau M. Influence of method of administration of rapeseed oil in dairy cows. 1. Digestion of nonlipid components. J Dairy Sci 1992; 75:3020-7. [PMID: 1460133 DOI: 10.3168/jds.s0022-0302(92)78065-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The effects of rapeseed oil supplements on ruminal digestion and total tract digestibility of nutrients were studied in four cows in midlactation, fitted with ruminal cannulas and used in a Latin square design (three periods x three diets). Treatments were basal diet only (control) or 1 kg of rapeseed oil added to a basal diet by continuous infusion or by a single administration via the ruminal cannula. The ratio of forage: concentrate of the basal diet was 68:32 on a DM basis. Total lipid contents were 3.9, 9.4, and 9.4% of DM in control diets and in diets with continuous and single supplementation, respectively. Fat supply decreased total tract OM digestibility (77.0, 72.0, and 74.0% in control diet and in diets with continuous and single supplementation, respectively) because of a depressive effect on fiber digestion. With both oil administration methods, the relative proportion of propionic acid increased and acetic and butyric acids in ruminal fluid decreased. Moreover, continuous infusion of oil increased the proportion of propionate and decreased the proportion of butyrate. When oil was added as a single administration, ammonia N concentration before feeding was lower than when oil was infused continuously.
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Affiliation(s)
- A Ferlay
- Laboratoire de la Lactation et de l'Elevage des Ruminants, Institut National de la Recherche Agronomique, Saint-Genès Champanelle, France
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Kaske M, Hatiboglu S, Engelhardt WV. The influence of density and size of particles on rumination and passage from the reticulo-rumen of sheep. Br J Nutr 1992; 67:235-44. [PMID: 1317720 DOI: 10.1079/bjn19920027] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Plastic particles with different densities (0.92, 1.03, 1.22 and 1.44 g/ml) and sizes (1, 10 and 20 mm) were introduced into the rumen of fistulated sheep kept on a roughage diet. The forestomach was emptied 12 and 24 h after the introduction of the particles, and the contents were replaced by the same amount of rumen contents without plastic particles. The proportions of particles which left the reticulo-rumen (RR) during the experimental period were determined by collecting the faeces during the following 5 d. Non-ruminated particles were separated from the dried RR contents and from the faeces. Large particles were ruminated independently of particle size and density within the investigated range. After 12 and 24 h, 59 and 81% respectively of the particles initially introduced were comminuted due to rumination. During the 12 h period about four times as many particles with a density of 1.44 g/ml passed from the RR into the omasum compared with particles with a density of 0.92 or 1.03 g/ml. Three to ten times more 1 mm particles were excreted than originally-large particles (10 and 20 mm). Particles introduced with an original size of 10 or 20 mm were recovered mostly comminuted in the faeces. In a further experiment the rumens of eight sheep were emptied and filled with a buffer solution. Plastic particles (10 g) of each length (1, 5, 10 and 20 mm; all with a density of 1.03 g/ml) were introduced into the ventral rumen. Sedimentation of particles was prevented by gassing the solution in the RR. Of the initially introduced particles, 31.9, 25.4, 12.7 and 1.5% of the 1, 5, 10 and 20 mm long particles respectively left the RR within 4 h. It is concluded that rumination of particles is independent of particle density and size within the tested range. The probability of particles leaving the RR increases with the higher particle density and with the smaller size. If particle sedimentation is prevented in the RR even 10 mm long particles can leave the RR in considerable amounts.
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Affiliation(s)
- M Kaske
- Department of Physiology, School of Veterinary Medicine, Hannover, Germany
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