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Lactational performance and energy utilisation in high yielding cows

Published online by Cambridge University Press:  20 November 2017

D.E. Beever ,
A.J. Hattan ,
S B Cammell ,
D.J. Humphries  and
A K Jones
D.E. Beever
Affiliation:
Centre for Dairy Research, Department of Agriculture, The University of Reading, Reading RG6 6AT, U.K.
A.J. Hattan
Affiliation:
Centre for Dairy Research, Department of Agriculture, The University of Reading, Reading RG6 6AT, U.K.
S B Cammell
Affiliation:
Centre for Dairy Research, Department of Agriculture, The University of Reading, Reading RG6 6AT, U.K.
D.J. Humphries
Affiliation:
Centre for Dairy Research, Department of Agriculture, The University of Reading, Reading RG6 6AT, U.K.
A K Jones
Affiliation:
Centre for Dairy Research, Department of Agriculture, The University of Reading, Reading RG6 6AT, U.K.
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Extract

Significant increases in genetic merit for milk production in the UK dairy herd have led to high and persistent milk yields becoming relatively common. Data relating this level of performance to the extent of the energy deficit in early lactation, possible impact on milk quality and the contribution of mobilised energy to milk production are relatively scarce. The aim of this study was to compare lactational performance in high- (HYC) and average- (AYC) yielding cows and to reconcile changes in body status (liveweight and condition score) of HYC with associated measurements of energy depletion and repletion.

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Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2000 , 2000 , pp. 10
Copyright
Copyright © The British Society of Animal Science 2000

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References

Beever, D.E., Cammell, S.B., Sutton, J.D., Rowe, N. and Perrott, G.E. (1998). Energy metabolism in high yielding cows. In: Proceedings of the winter meeting of the British Society of Animal Science, 1998Google Scholar
Cammell, S.B., Thomson, D.J., Beever, D.E., Haines, M.J., Dhanoa, M.S., Spooner, M.C. (198)]. The efficiency of energy utilisation in growing cattle consuming fresh perennial ryegrass (Lolium perenne cv Melle) or white clover (Trifolium repens cv Blanca). British Journal of Nutrition, 55, 669-80Google Scholar