Effects of feed intake on composition of sheep rumen contents and their microbial population size

@article{Rodrguez2003EffectsOF,
  title={Effects of feed intake on composition of sheep rumen contents and their microbial population size},
  author={Carlos Alberto Rodr{\'i}guez and J. Salvador Gonz{\'a}lez and Mar{\'i}a Remedios Alvir and Ram{\'o}n Redondo and Cecilia Cajarville},
  journal={British Journal of Nutrition},
  year={2003},
  volume={89},
  pages={97 - 103}
}
The present study was conducted to determine the effect of feed intake on the composition of the rumen contents of sheep and on their bacterial densities. Whole rumen contents were sampled after a period of continuous inter-rumen infusion of 15NH3 from four rumen-cannulated wethers successively fed on a hay–concentrate diet (2:1, / on a DM basis) at two rates of feed intake: 40 and 80 g D/g body weight0·75. Total weight and chemical composition of rumen contents, as well as the distribution by… 
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20 Citations
Background Citations
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Methods Citations
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Results Citations
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20 Citations

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Citation Type

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Composition of free and adherent ruminal bacteria: inaccuracy of the microbial nutrient supply estimates obtained using free bacteria as reference samples and (15)N as the marker.
TLDR
The relationships between SAB and LAB demonstrate that CP supply from SAB is underevaluated by, on average, 21.2% when LAB are used as the reference sample, and the prediction equation obtained using (15)N as the marker may be used to correct the errors associated with the traditional use of LAB as thereference sample, to obtain more accurate estimates of the microbial nutrient supply to the ruminants.
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Results indicate that feeding level affects microbial composition in the small intestine, and sufficient feed intake during weaning encourages proliferation of beneficial bacteria, thereby contributing to improved gut health.
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TLDR
Both the negligible ruminal escape of feed SP and the underevaluation of the bacterial nutrient supply as a consequence of the use of LAB as the only bacterial reference should be considered to improve ruminant protein feeding systems.
Feed Restriction Modulates the Fecal Microbiota Composition, Nutrient Retention, and Feed Efficiency in Chickens Divergent in Residual Feed Intake
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Investigation of the effect of restrictive vs. ad libitum feeding on the fecal microbiome at 16 and 29 days posthatch, FE and nutrient retention in chickens of low and high residual feed intake found restrictive feeding-associated changes in the microbiota were not similar in low and low RFI chickens, which may have been related to the higher nutrient retention and thus lower fecal nutrient availability in restrictively fed high RFI birds.
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TLDR
Integration of ruminal metabolism with that in the mammary and peripheral tissues can be improved to increase the efficiency of conversion of dietary nutrients into milk components for more efficient milk production with decreased environmental impact.
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TLDR
The general model (M=m (1−e−ft)j) allows easier and more accurate estimates of effective degradability, needed to improve protein-rationing systems.
Ruminal Fermentation and Fill Change with Season in an Arctic Grazer: Responses to Hyperphagia and Hypophagia in Muskoxen (Ovibos moschatus)
TLDR
Seasonal changes in digesta passage, fill, and fermentation in castrated adult muskoxen may foster a much more active microflora that requires consistent supplies of substrate, which minimizes winter costs and maximizes nutrients and energy gained from coarse forages in small home ranges throughout the year.
Feed Restriction Modifies Intestinal Microbiota-Host Mucosal Networking in Chickens Divergent in Residual Feed Intake
TLDR
This study investigated the effect of ad libitum versus restrictive feeding on ileal and cecal microbiota, concentrations of short-chain fatty acids, visceral organ size, intestinal morphology, permeability, and expression of genes related to nutrient uptake, barrier function, and innate immune response in broiler chickens with divergent residual feed intake (RFI).
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