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Plasma metabolite and hormone responses to rumen inert fat and protein supplies during the dry period in dairy cows

Published online by Cambridge University Press:  20 November 2017

G. Jaurena ,
J. M. Moorby  and
N.F.G. Beck
G. Jaurena*
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddam, Aberystwyth SY23 3EB, UK.
J. M. Moorby
Affiliation:
Institute of Grassland and Environmental Research, Plas Gogerddam, Aberystwyth SY23 3EB, UK.
N.F.G. Beck
Affiliation:
Institute of Rural Studies, University of Wales, Aberystwyth SY23 3AL, UK;
*
E-mail: [email protected]
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Extract

Nutritional regime during the dry period (DP) has been shown to affect lactational performance in dairy cows. These responses could be mediated by a variety of mechanisms (e.g. increased labile body proteins, function of the mammary gland or the liver, or modifying endocrine status), which are likely to exert an overlapping function.This study analysed the effect of protein (P) and/or fat (F) supplementation in the DP on plasma metabolite and hormone concentrations, as a complement to studies on body composition (Jaurena et al. 2001b.) and subsequent milk production (Jaurena et al., 2001a.) performance. Other results also associated with this work are presented in Jaurena et al. (2003).

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2003 , 2003 , pp. 74
Copyright
Copyright © The British Society of Animal Science 2003

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References

Jaurena, G., Moorby, J. M., Fisher, W. J. and Davies, D. W. R. (2001a.) Lactational responses to energy and protein supplies during the dry period in dairy cows. Proceeding of the British Society of Animal Science: 203.CrossRefGoogle Scholar
Jaurena, G., Moorby, J. M., Fisher, W. J. and Davies, D. W. R. (2001b.) Live weight, condition score and Longissimus dorsi responses to energy and protein supplies during the dry period in dairy cows. Proceeding of the British Society of Animal Science: 202.Google Scholar
Jaurena, G., Moorby, J. M., Beck, N.F.G. (2003). Supplementation with by-pass fat of late pregnant dairy cows modifies the relationship between body condition and plasma leptin concentration. This Meeting.Google Scholar