蛋白酶Versazyme 添加剂对肉鸡体重、饲料转化率和胸肉产量的有益作用-中国饲料行业信息网-立足饲料，服务畜牧

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　　致谢

　　本研究得到了美国农业部（USDA）中小企业创新研究计划（SBIR）项目的支持（2003-33610-13334）