Effects of Dietary Crude Protein Content on the Gaoyou Ducks Growth Performance and the Nitrogen Retention Rate
LI Hui-fang;WANG Qiang;LI Bao-lin;CHEN Kuan-wei;ZHAO Dong-wei;ZHU Wen-qi;SONG Wei-tao;ZHAO Yong-gao 
. 2009, (10): 8 -11 .