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On the diet selection of sheep: effects of adding urea to foods with different protein contents

Published online by Cambridge University Press:  20 November 2017

S. M. James
Affiliation:
Animal Nutrition and Health Department, Animal Biology Division, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG
I. Kyriazakis
Affiliation:
Animal Nutrition and Health Department, Animal Biology Division, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG
G.C. Emmans
Affiliation:
Animal Nutrition and Health Department, Animal Biology Division, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG
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Extract

The basis of diet selection for protein in ruminants remains unclear. Tolkamp et al., (1998) proposed a hypothesis to account for the conflicting findings. They proposed that ruminants select their diet on the basis of effective rumen degradable protein (eRDP) rather than for MP yield. As the protein supply of ruminants comes largely from microbial protein, the idea that ruminants select a diet that meets the requirement for eRDP, which is captured and utilised by the microbes to produce microbial protein, is not an unreasonable one. The objective of this experiment was to test the hypothesis that both inadequate and abundant eRDP levels would be avoided by growing sheep when given choices of foods.

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

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References

Tolkamp, B.J., Kyriazakis, I., Oldham, J.D., Lewis, M., Dewhurst, R.J. & Newbold, J.R. 1998. Diet Choice by dairy cows. II. selection for Metabolisable protein or for rumen degradable protein? Journal of Dairy science, 81: 26702680 CrossRefGoogle Scholar