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From nutrient requirement to animal response: predicting the profile of absorbed nutrients in dairy cattle

Published online by Cambridge University Press:  23 November 2017

J Dijkstra ,
E Kebreab ,
J A N Mills  and
J France
J Dijkstra*
Affiliation:
Animal Nutrition Group, Wageningen Inst of Animal Sciences, Wageningen Universisty, Marijkeweg 40, 6709 PG Wageningen, Netherlands
E Kebreab
Affiliation:
Centre for Nutrition Modelling, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
J A N Mills
Affiliation:
School fo Agric, Policy and Development, University of Reading, Earley Gate, Reading, RG6 6AR, United Kingdom
J France
Affiliation:
Department of Animal Production, University of Leon, 24007, Leon, Spain
*
Email: jan.dijkstra@wur.nl
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Extract

Current feed evaluation systems for dairy cattle aim to match nutrient requirements with nutrient intake at pre-defined production levels. However, these systems were not developed to address, and are not suitable to predict, the responses to dietary changes in terms of production level and product composition, excretion of nutrients to the environment, and nutrition related disorders. Quantitative research into ruminant digestion and metabolism has expanded greatly (Dijkstra et al., 2005) but has not (yet) given rise to practical, easy-to-use response systems. The change from a requirement to a response system to meet the needs of various stakeholders requires prediction of the profile of absorbed nutrients and its subsequent utilisation for various purposes. This contribution will examine the challenges to predicting the profile of nutrients available for absorption in dairy cattle and will provide guidelines for further improved prediction with regard to animal production responses, environmental pollution and animal health.

Type
Invited papers
Information
Proceedings of the British Society of Animal Science , Volume 2006 , March 2006 , pp. 220
Copyright
Copyright © 2016 The American Society of International Law

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References

Dijkstra, J., Forbes, J.M. and France, J. 2005. Quantitative aspects of ruminant digestion and metabolism (2nd edition). CAB International, Wallingford, UK, 736 pp.Google Scholar