Abstract
ABSTRACT BEEF cattle performance at constant indoor air temperatures of 13 and 29 C was compared with performance at 21 C. Cattle were fed either a 70 or 90%-concentrate ration and had either a 320 or 386 kg-average weight during the tests. Values of feed intake, rate of gain, and feed conversion at 13 and 21 C generally did not differ significantly regardless of body weight or ration. Significantly lower values of these factors occurred at air temperature 29 C compared with 21 C. The decline in performance at 29 C was greatest with the 90%-concentrate ration.
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