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A note on a partial adjustment model to describe lactation curves

Published online by Cambridge University Press:  02 September 2010

Janneke A. Hoekstra
Janneke A. Hoekstra
Affiliation:
TNO-Institute of Mathematics, Information Processing and Statistics, PO Box 100, 6700 AC Wageningen, The Netherlands
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Abstract

Dhanoa and Le Du (Animal Production 1982, 34: 243–247) proposed a model in which the milk yield in a particular week is described by a weighted average of a straight-line target yield and the yield in the preceding week. It is demonstrated that the weight parameter × in this model is partially determined by the time from calving to peak yield and hence does not represent correlation between successive yields satisfactorily.

Type
Research Article
Information
Animal Production , Volume 42 , Issue 3 , June 1986 , pp. 431 - 432
Copyright
Copyright © British Society of Animal Science 1986

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References

REFERENCES

Cobby, J. M. and Le Du, Y. L. P. 1978. On fitting curves to lactation data. Anim. Prod. 26: 127–133.Google Scholar
Dhanoa, M. S. and Le Du, Y. L. P. 1982. A partial adjustment model to describe the lactation curve of a dairy cow. Anim. Prod. 34: 243–247.Google Scholar
France, J. and Thornley, J. H. M. 1984. Mathematical Models in Agriculture, p. 225. Butterworth, London.Google Scholar
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