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The effect of milking throughout the whole of pregnancy on the composition of cow's milk

Published online by Cambridge University Press:  01 June 2009

J. V. Wheelock ,
J. A. F. Rook  and
F. H. Dodd
J. V. Wheelock
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
J. A. F. Rook
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
F. H. Dodd
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading
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Summary

The changes in yield and composition of milk when 4 cows were milked throughout the whole of pregnancy have been studied. The yield decreased to a minimum 1–20 days before parturition and then gradually increased. The changes in composition before parturition were similar to those observed in late lactation but more pronounced. The content of proteose-peptone plus globulin increased in late pregnancy with a sharp peak, of about 5 times the value observed in mid-lactation, within the last 10 days before parturition, and then decreased rapidly. After parturition milk yield increased rapidly and the changes in composition were less marked than in animals with the usual ‘dry period’. The results are discussed in relation to current knowledge of colostrum formation.

Type
Original Articles
Information
Journal of Dairy Research , Volume 32 , Issue 3 , October 1965 , pp. 249 - 254
Copyright
Copyright © Proprietors of Journal of Dairy Research 1965

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References

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