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Interrelationships among Vitamins A, E and K When Added to the Rations of Fattening Beef Cattle¹

Purdue University, Lafayette, Indiana

Abstract

Three beef fattening trials were conducted to study possible interrelationships of vitamins A, E and K as supplements to rations consisting of yellow corn, corn cobs, molasses, soybean meal and minerals.

Supplemental levels studied included, 12,500 I.U. or 20,000 I.U., of vitamin A orally, per day; an initial intramuscular injection of 4 million I.U. of vitamin A; 40 mg., 100 mg. or 200 mg. vitamin E, orally per day; 75 mg. vitamin K, orally, per day; and either 5% of the ration or a constant level of 227 gm. dehydrated alfalfa meal per head, daily.

Supplemental vitamin A, at all levels compared and by either method of administration, resulted in significantly (P<.01 or P<.05) increased rates of gain. In one experiment, the feeding of 227 gm. of dehydrated alfalfa meal in addition to 12,500 I.U. of vitamin A resulted in a significant (P<.05) increase in gain. In the third experiment, no increase in gain was obtained from incorporating 5% of dehydrated alfalfa meal in addition to 20,000 I.U. of vitamin A.

Feeding of supplemental vitamin A resulted in significantly (P<.01) higher serum and liver levels of vitamin A at time of slaughter.

Supplemental vitamin A, at all levels comsistent effect on gain, or serum or liver storage of vitamin A. In some instances, interactions between vitamin E and A were noted. Supplemental vitamin K was without significant effect on the parameters checked. Furthermore, there were no consistent interactions among vitamins A, E and K.

¹ Department of Animal Sciences Journal Paper No. 3035, Purdue University Agricultural Experiment Station. This research was supported in part by a grant-in-aid from Hoffman La Roche and Company, Nutley, New Jersey.

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