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331. The effect of feeding shark-liver oil to cows on the yield and composition, and on the vitamin A and carotene content of the milk

Published online by Cambridge University Press:  01 June 2009

K. L. Blaxter ,
S. K. Kon  and
S. Y. Thompson
K. L. Blaxter
Affiliation:
National Institute for Research in Dairying, University of Reading
S. K. Kon
Affiliation:
National Institute for Research in Dairying, University of Reading
S. Y. Thompson
Affiliation:
National Institute for Research in Dairying, University of Reading
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Extract

1. An experiment with ten dairy cows has shown that the daily feeding of 30 or 60 g. of shark-liver oil containing 80,000 i.u. of vitamin A/g. is without effect on milk yield, fat yield, the fat and solids-not-fat percentage of the milk and on the health and wellbeing of the cow.

2. The concentration of aneurin, riboflavin and vitamin C in the milk was not affected by the feeding of shark-liver oil.

3. The total carotenoids of the milk fat decreased when shark-liver oil was fed. The vitamin A content of the fat increased 1100% when 30 g. were given and 1850% when 60 g. were fed. The highest individual value reached was 390 i.u./g. fat.

Type
Original Articles
Information
Journal of Dairy Research , Volume 14 , Issue 3 , June 1946 , pp. 225 - 230
Copyright
Copyright © Proprietors of Journal of Dairy Research 1946

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References

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