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机译:Effects of ractopamine supplementation on growth performance and carcass characteristics of feedlot steers differing in biological type.
Department of Animal Sciences, Colorado State University, Fort Collins, CO 80523-1171, USA.;
beef cattle; carcass quality; carcass weight; cattle breeds; crossbreds; dressing percentage; feed conversion efficiency; feed supplements; growth; growth rate; liveweight gain; steers;