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Effect on milk lipolysis of restricted feeding with and without supplementation with protected rape seed oil

Published online by Cambridge University Press:  01 June 2009

Harald N. Astrup ,
Lars Bævre ,
Lars Vik-Mo  and
Asmund Ekern
Harald N. Astrup
Affiliation:
Agricultural University of Norway, N-1432 ÅS-NLH, Norway
Lars Bævre
Affiliation:
Agricultural University of Norway, N-1432 ÅS-NLH, Norway
Lars Vik-Mo
Affiliation:
Agricultural University of Norway, N-1432 ÅS-NLH, Norway
Asmund Ekern
Affiliation:
Agricultural University of Norway, N-1432 ÅS-NLH, Norway
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Summary

Feeding lactating cows at a reduced level for a 6-d-period caused blood serum and milk free fatty acids (FFA) to rise. Milk lipolysis developed more slowly and lasted longer than elevation of the level of FFA in blood. In a second experiment protected rape seed oil was given to underfed animals and inhibited the development of rancidity in the milk. Since unsaturated fat reduced lipoprotein lipase activity in the underfed cow, this supplement appears to reduce the effect of underfeeding if it is accepted that a normal response to underfeeding is to improve the efficiency of fat metabolism through increased lipoprotein lipase activity.

Type
Original Articles
Information
Journal of Dairy Research , Volume 47 , Issue 3 , October 1980 , pp. 287 - 294
Copyright
Copyright © Proprietors of Journal of Dairy Research 1980

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