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Studies on carotene in relation to animal nutrition: Part IV. Carotene balance experiments with cows and bullocks

Published online by Cambridge University Press:  27 March 2009

P. A. Seshan  and
K. C. Sen
P. A. Seshan
Affiliation:
Animal Nutrition Section, Imperial Veterinary Research Institute, Izatnagar, India
K. C. Sen
Affiliation:
Animal Nutrition Section, Imperial Veterinary Research Institute, Izatnagar, India
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Extract

The results of carotene metabolism experiments with four cows and four bullocks have been discussed. It has been shown that under ordinary farm diet, cows may secrete milk with a fair amount of carotene and vitamin A potency and still themselves remain on negative carotene balance, so far as the current intake and outgo are concerned. Increased intakes of carotene are, however, followed by the increased carotene and vitamin A potency of milk. Experiments with bullocks on a carotene-low diet consisting of dry rations have shown that the faecal carotene elimination attains a constant value and the animals show a consistently negative carotene balance. When, however, two doses of berseem are superimposed on this basal ration, positive retentions of carotene are obtained, followed by a rise in the blood-carotene level. The experimental evidence points to the possibility of a part of the faecal excretion being the result of a withdrawal of carotene from the body reserves.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 32 , Issue 3 , July 1942 , pp. 286 - 293
Copyright
Copyright © Cambridge University Press 1942

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References

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