Hostname: page-component-745bb68f8f-mzp66 Total loading time: 0 Render date: 2025-02-06T01:46:54.207Z Has data issue: false hasContentIssue false
  • English
  • Français

Dietary protein levels and blood composition of dairy cattle

Published online by Cambridge University Press:  02 September 2010

R.J. Treacher
R.J. Treacher
Affiliation:
ABC Institute for Research on Animal Diseases, Compton, Newbury, Berks, RG16 ONN
Get access

Extract

The protein requirements of farm animals cannot be considered in isolation from their energy requirements and studies on changes in blood composition due to changes in protein intake must be made with defined and preferably constant energy intake. Two experiments have been carried out in which groups of permanently housed cattle have been fed individually different levels of dietary protein while all were receiving the energy intakes recommended by the Agricultural Research Council (ARC, 1965).

In the first experiment the basic diet consisted of 6.8 kg hay and 1.8 kg concentrates of either 15.1 per cent digestible crude protein (DCP, high protein) or 6.8 per cent DCP (low protein), fed at 0.4 kg/kg milk produced. The peak milk yield was 13.5 kg/day and at peak yield, the daily metabolizable energy (ME) intake was 130 MJ in both groups. This experiment has been fully reported by Manston, Russel, Dew and Payne (1975).

Type
Research Article
Information
BSAP Occasional Publication , Volume 1: The Use of Blood Metabolites in Animal Production , January 1978 , pp. 133 - 142
Copyright
Copyright © British Society of Animal Production 1978

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Agricultural Research Council. 1965. The Nutrient Requirements of Farm Livestock. No. 2., Ruminants. Agricultural Research Council, London.Google Scholar
Allen, W.M., Parr, W.H., Anderson, P.H., Bereett, S., Bradley, R. and Patterson, D.S.P. 1975. Selenium and the activity of glutathione peroxidase in bovine erythrocytes. Vet. Eec. 96: 360–361.Google Scholar
Durkin, E.J. and Nishikawara, M.T. 1971. Effect of starvation, dietary protein and partial hepatectomy on rat liver aspartate and ornithine carbamyl transferases. J. Nutr. 101: 1467–1474.CrossRefGoogle Scholar
Hartmans, J. and Bosman, M.S.M. 1970. In Trace Element Metabolism in Animals, (ed. , E. and Mills, S.) Livingstone, Edinburgh and London.Google Scholar
Htbbitt, K.G., Neill, D. and Radford, P. 1969. The effect of diet on the incidence of induced ketosis in the lactating dairy cow. Res, vet. Sci. 10: 245–253.CrossRefGoogle Scholar
Little, W. 1974. An effect of the stage of lactation on the concentration of albumin in the serum of dairy cows. Res, vet. Sci. 17: 193–199.CrossRefGoogle ScholarPubMed
Macpherson, A. and Hemingway, R.G. 1965. Effects of protein intake on the storage of copper in the liver of sheep. J. Sci. Fd Agric. 16: 220–227.CrossRefGoogle Scholar
Mansion, R., Russell, A.M., Dew, S.M. and Payne, J.M. 1975. The influence of dietary protein upon blood composition in dairy cows. Yet. Rec. 96: 497–502.Google Scholar
Preston, R.L., Schnakenberg, D.D. and Pfander, W.H. 1965. Protein utilisation in ruminants. 1. Blood urea nitrogen as affected by protein intake. J. Nutr. 86: 281–288.CrossRefGoogle Scholar
Prewitt, L.R., Kertz, A.P., Lane, A.G., Campbell, J.R. and Weinman, D.E. 1971. Effects of dietary protein on blood, urine and milk composition. Am. J. vet. Res. 32: 393–397.Google ScholarPubMed
Wallace, H.D., Mccall, J.T., Bass, B. and Combs, G.E. 1960. High level copper for growing-finishing swine. J. Anim. Sci. 19: 1153–1163.CrossRefGoogle Scholar