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A quantitative model of energy intake and partition in grazing sheep in various physiological states

Published online by Cambridge University Press:  02 September 2010

R. R. Vera ,
J. G. Morris  and
Ling-Jung Koong
R. R. Vera
Affiliation:
Department of Animal Science, University of California, Davis, California 95616, USA
J. G. Morris
Affiliation:
Department of Animal Science, University of California, Davis, California 95616, USA
Ling-Jung Koong
Affiliation:
Department of Animal Science, University of California, Davis, California 95616, USA
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Summary

A quantitative model of energy intake and utilization by ewes in various physiological states grazing a pasture of perennial ryegrass is presented. The model consists of two major components: a forage intake component incorporating forage availability and maximum potential intake as affected by age of the grass and physiological state of the ewe; a second component representing energy utilization by the ewe for maintenance, growth, pregnancy, lactation and wool growth.

The behaviour of the model was examined and found to be consistent with published information. Partial validation of the model was accomplished by comparing the model output with actual experimental data not used to construct the model.

Type
Research Article
Information
Animal Production , Volume 25 , Issue 2 , October 1977 , pp. 133 - 153
Copyright
Copyright © British Society of Animal Science 1977

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References

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