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Effect of feeding fat to dairy cows receiving a fat-deficient basal diet: II. Fatty acid composition of the milk fat

Published online by Cambridge University Press:  01 June 2009

W. Banks ,
J. L. Clapperton  and
Morag E. Ferrie
W. Banks
Affiliation:
Hannah Research Institute, Ayr, Scotland, KA6 5HL
J. L. Clapperton
Affiliation:
Hannah Research Institute, Ayr, Scotland, KA6 5HL
Morag E. Ferrie
Affiliation:
Hannah Research Institute, Ayr, Scotland, KA6 5HL
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Summary

The effects on the fatty acid composition of milk fat of feeding various oil-enriched diets (soya oil, red palm oil/palmitic acid and tallow) to dairy cows receiving a fat-deficient basal diet are reported. It was found that a linear relation was obtained between the dietary intake of C18 fatty acids and their output in milk fat. A similar relation, applicable only to the oil-rich diets, was found for the C16 acids. The significance of these relations is discussed. Fatty acid compositions and yields are discussed and compared with literature examples in which similar oil-rich diets were fed, but in which the low amount of fat in the basal diet did not markedly depress milk yield. The proportion of trans-isomer in the octadecenoic acid was found to increase appreciably on feeding soya oil, and to a lesser extent with dietary tallow. A linear relation between the 18:0 and 18:1 contents of milk fat was found, and its significance is discussed.

Type
Research Article
Information
Journal of Dairy Research , Volume 43 , Issue 2 , June 1976 , pp. 219 - 227
Copyright
Copyright © Proprietors of Journal of Dairy Research 1976

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References

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