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Toward a new practical UK energy evaluation system for dairy cows

Published online by Cambridge University Press:  23 November 2017

B. J. Tolkamp  and
I. Kyriazakis
B. J. Tolkamp*
Affiliation:
Animal Nutrition and Health Department, SAC, Edinburgh, United Kingdom
I. Kyriazakis
Affiliation:
Animal Nutrition and Health Department, SAC, Edinburgh, United Kingdom
*
Email:Bert.Tolkamp@sac.ac.uk
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Extract

Energy evaluation systems translate animals’ requirements for net energy (NE) into feed metabolisable energy requirements (MER). The Feed into Milk (FiM) project resulted in a new system for predicting the MER of dairy cows (Thomas, 2004). In contrast to AFRC (1993), the FiM system is (almost) independent of feed quality, like the system proposed in 1994 by Tolkamp & Ketelaars (T&K). To translate NE requirements into MER, FiM requires nine parameters, while for all cattle that are fed (near) ad libitum T&K require only one. Here we analyse how these parameters contribute to the differences in prediction of daily MER between the two systems and what the causes of these differences are.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2008 , 2008 , pp. 110
Copyright
Copyright © The British Society of Animal Science 2008

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References

AFRC. 1993. Energy and Protein Requirements of Ruminants. Wallingford: CAB International.Google Scholar
Agnew, R.E., Yan, T., France, J., Kebreab, E. & Thomas, C. 2004. Pp. 11–20 in: Thomas, C. (Editor). 2004. Feed into Milk. A new applied feeding system for dairy cows. Nottingham University Press.Google Scholar
Tolkamp, B.J. & Ketelaars, J.J.M.H. 1994. Animal Production 59: 43–47.Google Scholar