日粮能量水平对肉鸭生产性能影响及"标准曲线法"测定饲用酶制剂的表观代谢能值日糧能量水平對肉鴨生產性能影響及"標準麯線法"測定飼用酶製劑的錶觀代謝能值 일량능량수평대육압생산성능영향급"표준곡선법"측정사용매제제적표관대사능치 The effects of dietary energy levels on the performance of meat duck and determination of apparent metabolizable energy of feed enzymes by standard curve method
