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Grazing and Drylot Cattle Fed Grain and a Cellulolytic Enzyme¹

Washington Agricultural Experiment Stations, Irrigation Experiment Station, Prosser²

Abstract

Forty yearling steers were used in a trial to determine effects of a cellulolytic enzyme on their performance.

Average daily gain by pasture and drylot cattle was not significantly affected by the enzyme. Feed efficiency was best in drylot cattle but was not affected by the enzyme. Dressing percent was higher in alfalfa-pasture cattle than in alfalfa-hay cattle. Marbling was the only carcass trait that was significantly correlated with final carcass grade (pasture and drylot). Of the other correlation coefficients determined, none was significant.

¹ Scientific Paper No. 2417, Washington Agricultural Experiment Stations, Pullman, Washington. Project 1651.

² The enzyme preparation, Takamine Cellulase 4000, was supplied by Miles Chemical Company. Progesterone-estradiol implants were furnished by E. R. Squibb and Sons Division, Olin Mathieson Chemical Corporation.