In the study 20 adult pheasants were selected to determine endogenous metabolic nitrogen ( EMN ) and crude protein requirement for maintenance ( RCPm ) by the methods of nitrogen free diet regression analysis .
本研究选择20只成龄母雉鸡，采用无氮日粮法和回归分析法比较测定内源代谢氮和维持蛋白质需要量。
emn