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Certain Trace Elements in the Feeds, Organs, and Tissues of a Selected Group of Repeat Breeding Cows in Northeastern Wisconsin¹

Department of Biochemistry, College of Agriculture, University of Wisconsin, Madison

ABSTRACT

In an effort to determine the relationship of trace minerals to the repeat breeding cow problem, a study of the distribution of manganese and cobalt in the feeds fed the cows from problem herds and the distribution of cobalt and manganese in certain tissues and organs of problem cows has been made. It is evident that no single cause was responsible for the repeat breeder cow from these herds. Low blood plasma ascorbic acid values were found to exist. There was definite evidence of low or marginal cobalt intake associated with many of these problem herds. The manganese concentrations of the feeds from these farms was on the low side of the normal range, while ovarian concentrations were definitely low. It appears from these data that trace minerals have little if any direct relationship to the repeat breeding cow problem, although this possibility is not precluded by the data.

¹ Published with the approval of the Director of the Wisconsin Agricultural Experiment Station. Supported in part by a grant from The Tennessee Eastman Corp., Kingsport.