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Live weight, condition score and Longissimus dorsi responses to energy and protein supplies during the dry period in dairy cows

Published online by Cambridge University Press:  20 November 2017

G. Jaurena ,
J. M. Moorby ,
W. J. Fisher  and
D. W. R. Davies
G. Jaurena
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth SY23 3EB, UK
J. M. Moorby
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth SY23 3EB, UK
W. J. Fisher
Affiliation:
Institute of Grassland and Environmental Research, Trawsgoed Farm, Trawsgoed, Aberystwyth SY23 4LL, UK
D. W. R. Davies
Affiliation:
Institute of Grassland and Environmental Research, Trawsgoed Farm, Trawsgoed, Aberystwyth SY23 4LL, UK
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Extract

Body fat and protein reserves at calving can affect milk production and composition (Garnsworthy, 1988; Moorby et al., 1996). Milk producers frequently feed their dry cows with a low quality diet to prevent them from becoming too fat before calving. However, the cow must nourish the foetus and develop mammary secretory tissues, which can be a problem if she is offered a low protein diet. This experiment was designed to test the interaction between energy and protein supplies during the dry period on changes in live weight (LW), condition score (CS) and muscle Longissimus dorsi depth (LD). Subsequent milk production and composition data are reported in a separate summary (Jaurena et al., 2001).

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2001 , 2001 , pp. 202
Copyright
Copyright © The British Society of Animal Science 2001

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References

Garnsworthy, P. C. 1988. The effect of energy reserves at calving on performance of dairy cows. In: Nutrition and lactation in the dairy cow. Ed. Garnsworthy, P. C.. Butterworths, London, Pp. 157–170.Google Scholar
Jaurena, G., Moorby, J. M., Fisher, W. J. and Davies, D. W. R. 2001. Lactational responses to energy and protein supplies during the dry period in dairy cows. This meeting.CrossRefGoogle Scholar
Moorby, J. M., Dewhurst, R. J. and Marsden, S. 1996. Effect of increasing digestible undegraded protein supply to dairy cows in late gestation on the yield and composition of milk during the subsequent lactation. Animal Science 63: 201–213.Google Scholar