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Some aspects of machine milking rate

Published online by Cambridge University Press:  01 June 2009

G. F. Wilson
G. F. Wilson
Affiliation:
Massey College, Palmerston North, New Zealand
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Summary

A study was made of the machine milking rates of a sample of Jersey cows comprising daughter-dam pair groups, obtained from thirteen New Zealand herds during mid-lactation.

Twenty-one per cent of the variation in maximum rate of flow occurred within herds and the remainder between herds. Differences in the type of preparation of cows for milking did not have a significant effect on the average milking rates for herds. The variance in milking time between cows within poorly prepared herds was greater, however, than that in the better prepared herds.

Heritability estimates for maximum rate of flow, derived from the regression of daughters' records on dams' records, were found to be of the order of 80%.

Type
Original Articles
Information
Journal of Dairy Research , Volume 30 , Issue 2 , June 1963 , pp. 191 - 196
Copyright
Copyright © Proprietors of Journal of Dairy Research 1963

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References

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