J. Anim Sci.
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J. Anim Sci. 1949. 8:381-391.
© 1949 American Society of Animal Science
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The Effect of a Low Carotene Winter Ration on the Blood, Milk, and Liver Concentrations of Vitamins A and C of Ewes and their Lambs1

W. C. Weir, A. L. Pope, P. H. Phillips and G. Bohstedt2

University of Wisconsin,3

Abstract

In order to study some of the effects of a low carotene ration on ewes and their lambs, a group of ewes was fed the following ration for two successive winters: oat straw, oats, soybean oil meal, and CaCO3. A control group was fed alfalfa hay and oats. During the second season, additional ewes were added to the low carotene group and given 25,000 I.U. of vitamin A weekly.

Blood plasma vitamin A levels of the ewes and their lambs receiving the hay ration were consistently higher than the plasma vitamin A levels of the ewes and lambs receiving the straw ration with or without the addition of 25,000 I.U. of vitamin A weekly.

The vitamin A concentration of colostrum was high in all lots, with no appreciable differences between lots during the first week after parturition. The vitamin A concentration of the later milk from the hay lot ewes was significantly higher than the later milk from the straw lot ewes.

Footnotes

1 Published with the approval of the Director of the Wisconsin Agricultural Experiment Station. This work supported in part by the Wisconsin Alumni Research Foundation.

2 The authors acknowledge the technical assistance of M. F. Badr and M. Moinuddin. The data in this paper are taken from a thesis presented by W. C. Weir to the Graduate School of the University of Wisconsin in partial fulfillment of the requirements for the degree of Doctor of Philosophy.

3 Departments of Animal Husbandry and Biochemistry, Madison, Wisconsin.






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