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Effect of Methionine Hydroxy Analog on Energy Utilization of a Bird-Resistant Sorghum Grain Diet Fed Steers^{1 ,2,}

University of Florida, Gainesville 32611and Agricultural Research Center, Jay 32565

Abstract

Methionine hydroxy anaolog (-hydroxy -methylmercaptobutyrate-Ca or MHA) was evaluated as a dietary supplement for increasing digestibility and energy utilization of bird-resistant (BR) sorghum grain diets fed steers in metabolism and comparative slaughter feedlot trials. Levels of MHA fed were 0, 7 or 30 g per steer per day. TDN, ME and nitrogen balance values were slightly improved by MHA supplementation. NE_m was enhanced slightly but NE_g values of the diets were unaffected by MHA. Liveweight gains were not improved by MHA. Gains were more accurately predicted with NE_m and NE_g values than with the GE:ME system.

¹ Florida Agricultural Experiment Stations Journal Series No. 1029.

² Methionine hydroxy analog supplied by R. B. Bishop of the E. I. duPont de Nemours Co.

³ Present address: Industrial Molasses Corp., 6600 France Ave. S., Minneapolis, MN.

⁴ Animal Science Dept., Univ. of Florida, Gainesville.

⁵ Agricultural Research Center, Jay, FL.