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Effect of Various Energy Supplements on Gains, Yields and Carcass Grades of Lambs Grazing Alfalfa Pasture¹

University of California

Abstract

Limited, or free choice amounts of various energy supplements (alfalfa pellets, 30% concentrate pellets, 60% concentrate pellets, barley, or molasses) were fed to lambs grazing alfalfa in the Imperial Valley of California during two successive years. When fed in limited amounts none of the supplements significantly increased average daily gain, although there was an advantage of greater yields and more choice carcasses. Free choice of the supplement resulted in significant increases in average daily gain of pellet-supplemented animals over the controls with some advantage in carcass grade for all supplemented animals. When pasture and a supplement were available free-choice, the supplement required to produce a pound of lamb was not in excess of the amount ordinarily required of the same feed under drylot conditions.

¹ Acknowledgement is made of the assistance of the late Nicholas R. Ittner under whose direction a portion of the 1957–58 trial was conducted.

² Department of Animal Husbandry, Imperial Valley Field Station, El Centro, California.

³ Department of Animal Husbandry, Davis, California.