β-兴奋剂对牛育肥性能的影响

Effect of β－agonist on Growing－fatting Perfomance of Cattle

试用β－兴奋剂药clenbuterol以3μg／kg体重饲喂牛240d，结果表明clenbuterol对牛的增重无影响，可提高饲料报酬4．0％（P＞0．05）；能显著改善肉的品质，使净肉率提高19．9％（P＜0．01），脂肪重量降低66．1％（P＜0．01）。

cattle in 2 groups were administered 0．3μg／kg BW β－agonist sort drugs clenbuterol which had been fed for 240 days． Results showed that clenbuterol didn＇t influence significantly ADG of cattle FBG was increased 4％P＞0．05 but It was significantly improving meat quality net meat weight rates was increased 19．9％ P＜0．01 fat weight rates was decreased 66．1％P＜0．01．