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Total and Shaded Space Allotments for Beef Feedlots as Affected by Ration in a High Temperature Environment¹

University of California, Davis

Abstract

A factorial experiment involving shade area, total pen area and ration was conducted during three summers (average air temperature 90.7° F.) to obtain some information regarding the physical facilities for feedlot cattle in high temperature areas.

Results indicated no consistent advantage to providing a shaded area greater than 27 sq. ft. per animal. Daily gains and feed consumption were not reduced when total pen space was as low as 90 sq. ft. per animal. A ration high in estimated net energy (67 megcal./100 lb.) produced more rapid gains than a lower energy ration (56 megcal./100 lb.) although the low energy ration was consumed in larger amounts. No interactions were present between any of the factors studied.

¹ Cooperative research project between the University of California and the U.S.D.A.

² Department of Animal Husbandry, El Centro.

³ Department of Agricultural Engineering, Davis.

⁴ Agricultural Engineer, U.S.D.A., Davis.