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Comparative Nutritive Value of Raw, Roasted, Ensiled High-Moisture^{1, 2,} and Pressure Flaked Corn for Growing-Finishing Beef Cattle

Purdue University, W. Lafayette, Indiana 47907

Abstract

Seven feeding trials and two 4 x 4 latin square digestion trials were used to compare (1) the feedlot performance of cattle fed raw, roasted (whole and rolled) and ensiled high-moisture corn and (2) the digestibility of raw (whole and rolled), roasted (whole and rolled) and pressure flaked corn. Gains on roasted corn were equal to or better (P< .05; P<.01) than gains on raw corn. Gains and feed efficiency on roasted corn improved (P< .05) with increased roasting temperature of the corn. High-moisture corn depressed (P< .05) gain. Dry matter intake was approximately equal for raw and roasted corn, but lower (P< .05) for high-moisture corn. In all seven feeding experiments, cattle gained more efficiently on roasted corn than on raw corn. Roasting also lowered silage dry matter required per unit gain. Ensiled high-moisture corn lowered corn dry matter per unit gain but raised silage dry matter per unit gain resulting in no effect on total dry matter per unit gain.

¹ Journal Paper No. 5697, Purdue University Agricultural Experiment Station.

² The research reported herein was supported by a grant-in-aid from Mix Mill, Inc., Bluffton, Indiana.