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Factors affecting maintenance requirements of beef cows

Published online by Cambridge University Press:  02 September 2010

A. J. F. Russel  and
I. A. Wright
A. J. F. Russel
Affiliation:
Hill Farming Research Organisation, Bush Estate, Penicuik, Midlothian EH26 0PY
I. A. Wright
Affiliation:
Hill Farming Research Organisation, Bush Estate, Penicuik, Midlothian EH26 0PY
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Abstract

The maintenance energy requirements of 29 Hereford × Friesian and 27 Blue Grey (White Shorthorn × Galloway) cows each offered one of six levels of feeding supplying between 0·5 and 1·2 likely maintenance requirements for 56 days were estimated, from regressions of daily live-weight change on energy intake, as the energy intake corresponding to zero live-weight change.

There were no effects of level of intake on diet digestibility or of genotype on maintenance requirements.

Maintenance requirements (M, MJ metabolizable energy per day) were shown to be determined by both live weight (LW, kg) and body condition score (C) according to the relationship: M = 0·147LW – 0·016C.LW.

The estimates derived are compared with other published values and the hypothesis is advanced that maintenance requirements are likely to be more closely related to body protein mass than to body weight.

The dietary energy equivalent of 1 kg loss of live weight is calculated to be 26·7 MJ and it is estimated that in non-lactating cows body tissue is used for maintenance with an efficiency of 0·77.

Type
Research Article
Information
Animal Production , Volume 37 , Issue 3 , December 1983 , pp. 329 - 334
Copyright
Copyright © British Society of Animal Science 1983

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References

REFERENCES

Agricultural Research Council. 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Blaxter, K. L. and Wainman, F. W. 1966. The fasting metabolism of cattle. Br. J. Nutr. 20: 103–111.CrossRefGoogle ScholarPubMed
Doney, J. M. and Russel, A. J. F. 1968. Differences amongst breeds of sheep in food requirements for maintenance and live-weight change. J. agric. Sci., Camb. 71: 343–349.Google Scholar
Garrett, W. N. 1971. Energetic efficiency of beef and dairy steers. J. Anim. Sci. 32: 451–456.Google Scholar
Gibb, M., Robinson, I. and McGowan, A. 1977. Effect of body condition on maintenance requirements and efficiency of liveweight gain of dry dairy cows. A. Rep. Ellinbank Dairy Res. Inst., p. 38.Google Scholar
Graham, N. MCC. 1967. The metabolic rate of fasting sheep in relation to total and lean body weight, and the estimation of maintenance requirements. Aust. J. agric. Res. 18: 127–136.Google Scholar
Lawes Agricultural Trust. 1977. Genstat V, Mark 4.01. Rothamsted Experimental Station, Harpenden, Hertfordshire.Google Scholar
Lowman, B. G., Scott, N. A. and Somerville, S. H. 1976. Condition scoring of cattle. Rev. ed. Bull. E. Scotl. Coll. Agric, No. 6.Google Scholar
Ministry of Agriculture, Fisheries and Food, Department of Agriculture and Fisheries for Scotland and Department of Agriculture for Northern Ireland. 1975. Energy allowances and feeding systems for ruminants. Tech. Bull. 33. Her Majesty's Stationery Office, London.Google Scholar
Russel, A. J. F. and Wright, I. A. 1983. The use of blood metabolites in the determination of energy status in beef cows. Anim. Prod. 37: 335–343.Google Scholar
Van soest, P. J. and Wine, R. H. 1967. Use of detergents in the analysis of fibrous feeds. IV. Determination of plant cell-wall constituents. Jnl Ass. off. analyt. Chem. 50: 50–55.Google Scholar
Webster, A. J. F. 1980. The energetic efficiency of growth. Livest. Prod. Sci. 7: 243–252.CrossRefGoogle Scholar
Webster, A. J. F., Lobley, G., Reeds, P. J. and Pullar, J. D. 1978. Protein mass, protein synthesis and heat loss in the Zucker rat. Proc. Nutr. Soc. 37 21A (Abstr.).Google ScholarPubMed
Williams, C. H., David, D. J. and Iismaa, O. 1962. The determination of chromic oxide in faeces samples by atomic absorption spectro photometry. J. agric. Sci., Camb. 59: 381–385.CrossRefGoogle Scholar
Wright, I. A. and Russel, A. J. F. 1983. Fat partition, body composition and score in mature cows. Anim. Prod. In press.Google Scholar