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The Value of Supplemental Trace Minerals in Cattle Fattening Rations¹

Kansas State University, Manhattan

Abstract

Four feeding trials were conducted to study the value of adding a combination of trace minerals to fattening rations for cattle. Addition of cobalt, copper, iron, iodine, manganese and zinc to fattening rations consisting of sorghum grain, protein concentrate, prairie hay, ground limestone and salt was without effect on gain or feed efficiency.

Addition of these minerals to a similar fattening ration containing corn in place of sorghum grain produced a highly significant increase in rate of gain. The cattle gained 0.47 lb. more per head daily, on the average, for the two trials when trace minerals were added to the corn ration, and feed efficiency was improved.

¹ Contribution No. 224, Department of Animal Husbandry, Kansas Agricultural Experiment Station, Manhattan. A portion of a thesis submitted by R. R. Oltjen to the School of Agriculture, Kansas State University in partial fulfillment of the requirements for the M.S. degree, 1958.

² Present address: Oklahoma State University.

³ The authors wish to express appreciation to the Calcium Carbonate Company, Chicago, for supplying the trace minerals used in experiments II, III, and IV.