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Variation in the milk yield, endocrine and metabolic responses following bovine somatotropin administration to dairy cows

Published online by Cambridge University Press:  24 November 2017

M.T. Rose ,
T.E.C. Weekes  and
P. Rowlinson
M.T. Rose
Affiliation:
Dept. of Biological and Nutritional Sci, The University, Newcastle upon Tyne. NE1 7RU
T.E.C. Weekes
Affiliation:
Dept. of Biological and Nutritional Sci, The University, Newcastle upon Tyne. NE1 7RU
P. Rowlinson
Affiliation:
Dept of Agriculture, The University, Newcastle upon Tyne. NE1 7RU
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Extract

It is well established that the subcutaneous administration of bovine somatotropin (bst) to dairy cows results in an increased level of milk production. This effect occurs irrespective of the method of application, the duration of the treatment or the time after calving after which it commences. However, the reported extent of this galactopoietic effect in the published literature has been highly variable, with one long term study reporting an increase of over 11.5 kg/day (Bauman et al. 1985), whilst other long term studies have reported relatively small increases or no significant increase at all (Hof et al. 1991, Morbeck et al. 1991). As yet it is unknown what factors control the milk yield response to bst, though there is a clear effect of dose of the hormone and possibly of energy and protein balance. There are also confusing reports on the effect of the previous milk yield and genetic potential of the animal on the observed increase.

Type
Milk Production: 1
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1992 , March 1992 , pp. 36
Copyright
Copyright © The British Society of Animal Production 1992

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References

Literature Cited.

Bauman, D.E., Eppard, P.J., DeGeeter, M.J. and Lanza, G.M. (1985). Responses of high producing cows to long term treatment with pituitary somatotropin and recombinant somatotropin. Journal of Dairy Science 68 1352–1362.Google Scholar
Hof, G., Lenaers, P.J., Tamminga, S., Jonker, L.J. and Koffeman, A.I. (1991). Bovine somatotropin and feed interactions in dairy cows. Livestock Production Science 28 21–36.Google Scholar
Morbeck, D.E., Britt, J.H. and McDaniel, B.T. (1991) Relationships among milk yield, metabolism, and reproductive performance of primiparous holstein cows treated with somatotropin. Journal of Dairy Science 74 2153–2164.CrossRefGoogle ScholarPubMed