J. Anim Sci.
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J. Anim Sci. 1952. 11:721-726.
© 1952 American Society of Animal Science
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A Comparison of Swine Feeds as Sources of Provitamin A1

J. F. Hentges, Jr., R. H. Grummer, P. H. Phillips and G. Bohstedt

University of Wisconsin2

Abstract

Carotenoids in sun-cured alfalfa hay, dehydrated alfalfa meal, dehydrated alfalfa pellets, yellow corn, and crystalline carotene in cottonseed oil when fed at the rate of 25 {gamma}/kg. body weight daily to vitamin A deficient pigs were adequate for optimum weight gains and eventual restoration of apparently normal blood plasma vitamin A levels. However, the rate of recovery of normal plasma vitamin A levels varied with the source of carotenoids. The feeds used showed the following order of effectiveness as sources of provitamin A: dehydrated alfalfa meal and pellets, crystalline carotene in cottonseed oil, sun-cured alfalfa hay and yellow corn.

Footnotes

1 Published with the approval of the Director of the Wisconsin Agricultural Experiment Station.

2 Departments of Animal Husbandry and Biochemistry, Madison, Wis.






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