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Carotenoid and Vitamin A Content of Milk and Blood of Dairy Cattle Fed Moderate Amounts of Ground Soybeans, Soybean Oil Meal, and Linseed Oil Meal

Ohio Agricultural Experiment Station, Wooster

ABSTRACT

Conclusion: Analyses of the carotenoids and vitamin A in the milk of cows and in the blood of growing heifers fed liberal amounts of good roughage showed no evidence that ground soybeans caused carotene destruction or interfered with its absorption or conversion to vitamin A when fed as the protein supplement in simple grain rations. Therefore, under practical dairy feeding conditions, where good roughage is fed liberally, soybeans could be used, where advantageous, as the protein supplement in grain mixtures without danger of vitamin A deficiency. No significant effects of feeding ground soybeans on total milk production were observed in these experiments. Butterfat per cent was higher during the periods when ground soybeans were fed.

¹ Retired in 1951, now deceased.