Document Type


Report Number

A.S. Series 73-33

Publication Date



A high rate of gain can be obtained with growing and finishing cattle fed ear corn adequately supplemented with protein, minerals and vitamins. The cob portion of the ear furnishes more roughage than has been reported to result in optimum gains with minimum problems frequently associated with high-concentrate diets. Other roughages are not indicated with ear corn where high rates of gain are desired. Ear corn contains less protein than recommended in most diets for growing and finishing cattle. The low protein cob portion may not be an economical source of roughage in comparison to those considerably higher in protein unless there can be an effective and relatively cheap source of supplemental protein . Urea can be an effective source of protein at less cost than most plant sources under proper conditions of use. However, there are limitations in amount for the most effective results which vary with dietary conditions. There are several advantages for harvesting corn at about 30% grain moisture. This high-moisture grain has been reported to have some advantages over dry grain for growing and finishing cattle. The advantages for the high moisture content over the dry form appears to be greater for ear corn than for shelled corn. Storage conditions for high-moisture grains must be adequate to prevent spoilage. Conditions vary with moisture content and length of time in storage. The experiment reported here was conducted to study sources and levels of protein supplementation with high-moisture ground ear corn for growing and finishing cattle. Comparisons were also made between an upright concrete stave and an oxygen limiting (Harvestore) silo as methods for storing the corn.

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Department of Animal Science, Agricultural Experiment Station, South Dakota State University