不同日粮非蛋白氮、硫水平下肉牛铜的需要量研究
杨在宾;贾志海;于玲玲;杨维仁;姜淑贞
Study on Requirement of Copper for Beef Cattle under Different Dietary Levels of NPN and Sulfur
畜牧兽医学报 . 2006, (11): 1179 -1183 .