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Approximations in the variable net energy system for ruminants

Published online by Cambridge University Press:  02 September 2010

J. J. Glen
J. J. Glen
Affiliation:
Department of Business Studies, University of Edinburgh, Edinburgh EH8 9JY
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Abstract

The variable net energy system for ruminants was developed to allow rations to be formulated in an additive manner. It is demonstrated that the variable net energy system is based on approximations which can cause errors in ration formulation. The extent of these errors is examined for cattle rations, and it is shown that the errors can be significant.

Type
Research Article
Information
Animal Production , Volume 41 , Issue 2 , October 1985 , pp. 235 - 238
Copyright
Copyright © British Society of Animal Science 1985

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References

REFERENCES

Glen, J. J. 1980. A parametric programming method for beef cattle ration formulation. J. Opt Res. Soc. 31: 689–698.CrossRefGoogle Scholar
Harkins, J., Edwards, R. A. and McDonald, P. 1974. A new net energy system for ruminants. Anim Prod. 19: 141–148.Google Scholar
MacHardy, F. V. 1965. An investigation of the application of programming techniques to farm management problems. Ph.D. Thesis, Univ. Edinburgh.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