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The effect of restricted grazing during a single day upon milk yield, milk composition and butterfat characteristics

Published online by Cambridge University Press:  01 June 2009

R. E. Munford ,
I. L. Campbell ,
F. H. McDowall  and
A. W. F. Davey
R. E. Munford
Affiliation:
Massey University College and The Dairy Research Institute (N. Z.), Palmerston North, New Zealand
I. L. Campbell
Affiliation:
Massey University College and The Dairy Research Institute (N. Z.), Palmerston North, New Zealand
F. H. McDowall
Affiliation:
Massey University College and The Dairy Research Institute (N. Z.), Palmerston North, New Zealand
A. W. F. Davey
Affiliation:
Massey University College and The Dairy Research Institute (N. Z.), Palmerston North, New Zealand
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Summary

The effects of depriving cows of pasture, for part or all of a single interval between the morning and evening milkings, on milk yield and composition have been investigated. The yields of milk and solids-not-fat, but not of fat, were reduced. The characteristics of the butterfat obtained at the first 2 milkings following grazing restriction differed markedly from those of cows allowed to graze normally.

The changes observed suggested that the grazing restriction led to a temporary reduction in the supply of volatile fatty acids from the rumen and an increased utilization of fatty acids from body fat by the mammary gland.

Type
Original Articles
Information
Journal of Dairy Research , Volume 31 , Issue 1 , February 1964 , pp. 59 - 69
Copyright
Copyright © Proprietors of Journal of Dairy Research 1964

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