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Effects of fibre level and particle size on rumen microbial fermentation and protein metabolism using liquid and solid associated bacteria

Published online by Cambridge University Press:  20 November 2017

M. Rodríguez
Affiliation:
Dept. de Ciència Animal i dels Aliments. Universitat Autònoma de Barcelona. 08193-Bellaterra, Spain
S. Calsamiglia
Affiliation:
Dept. de Ciència Animal i dels Aliments. Universitat Autònoma de Barcelona. 08193-Bellaterra, Spain
A. Ferret
Affiliation:
Dept. de Ciència Animal i dels Aliments. Universitat Autònoma de Barcelona. 08193-Bellaterra, Spain
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Extract

The effects of fibre level (F) and forage particle size (S) on ruminal fermentation profile is often mediated through changes in feed intake, rates of digestion or passage, ruminal pH and/or bacteria population. Therefore, most in vivo studies have confounded the direct effect of F or S with changes in the rumen environment. In vitro systems allow to control several fermentation conditions independently (pH, flow rates, intake). Total, bacterial and dietary nitrogen (N) flows are generally calculated using liquid associated bacteria (LAB), although solid associated bacteria (SAB) represent about 80% of total bacterial population in the rumen (Olobobokun and Craig, 1988). The objective of this experiment was to study the effects of F and S on microbial fermentation and N metabolism using LAB or SAB values in a dual flow continuos culture system.

Type
Poster Presentations
Copyright
Copyright © The British Society of Animal Science 2001

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References

Hoover, W.H., Crooker, B.A., Sniffen, C.J.. 1976. Effect of differential solid and liquid removal rates on protozoa number in continuous culture of rumen content. J. Anim. Sci. 43:528.CrossRefGoogle Scholar
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