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‘Grape marc’ as a source of tannins to reduce proteolysis during ensilage

Published online by Cambridge University Press:  23 November 2017

E.R. Deaville ,
D.I. Givens  and
I. Mueller-Harvey
E.R. Deaville*
Affiliation:
Animal Science Research Group, School of Agriculture, Policy and Development, P.O. Box 237, Reading, RG6 6AR, United Kingdom
D.I. Givens
Affiliation:
Animal Science Research Group, School of Agriculture, Policy and Development, P.O. Box 237, Reading, RG6 6AR, United Kingdom
I. Mueller-Harvey
Affiliation:
Chemistry and Biochemistry Laboratory, School of Agriculture, Policy and Development, P.O. Box 236, Reading, RG6 6AT, United Kingdom
*
Email:e.r.deaville@reading.ac.uk
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Extract

A reduction of the overall nitrogen (N) loss to the environment from intensive ruminant production systems remains a key policy and research objective. Such an outcome is essential for the development of sustainable ruminant farming systems that minimise their environmental footprints. Plant and microbial enzyme-mediated proteolysis during ensilage results in the extensively hydrolysed N fraction in grass silage (Givens and Rulquin, 2004). It is generally accepted that the highly soluble N fraction of grass silage is poorly utilised by ruminants, reflecting the low efficiency of capture of silage N in the rumen. An improvement in dietary N efficiency by ruminants is therefore a key concern. Plant tannins have in common their capacity to bind proteins and an improvement in N utilisation by ruminants has been reported for a number of tanniniferous feeds (Mueller-Harvey, 2006). Therefore, the aim of the present experiment was to study a by¬product from the wine industry, so-called ‘grape marc’, as a potential source of tannins to reduce proteolysis during ensilage.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2007 , April 2007 , pp. 227
Copyright
Copyright © The British Society of Animal Science 2007

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References

Givens, D.I. and Rulquin, H. (2004). Review: Utilisation by ruminants of nitrogen compounds in silage-based diets. Animal Feed Science and Technology, 114:1–18.Google Scholar
Mueller-Harvey, I. 2006. Review: Unravelling the conundrum of tannins in animal nutrition and health. Journal of the Science of Food and Agriculture, 86:2010–2037.CrossRefGoogle Scholar