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Further Studies of the Rôle of Vitamin C in the Nutrition of Calves^*

University of Minnesota, St. Paul, Minnesota

ABSTRACT

A previous publication (1) has reported experiments showing that calves do not require vitamin C in their feed in quantities that can be measured by the present method of testing food materials for their antiscorbutic potency by feeding them to guinea pigs. Further results have been obtained which have no effect on the practical phase of this problem, but which have extended somewhat our knowledge of vitamin C in relation to the bovine. This paper is concerned with a study of the presence of vitamin C in the livers of two of the calves and in the milk of a heifer grown from birth on the vitamin C-deficient ration and with an attempt to locate the source of vitamin C supply to calves receiving rations deficient in this vitamin.

Vitamin C tests of livers

After one year of experimental feeding as previously described (1) the livers of control calf E-44, and experimental calf E-45 were removed at autopsy and immediately frozen in a sharp freezer.

^* These data are taken from a thesis presented to the Graduate Faculty of the University of Minnesota by L. M. Thurston in partial fulfillment of the requirements for the degree of Ph.D. Published by permission of the Director as Paper No. 860 Journal Series, Minnesota Experiment Station.