中文摘要：

以健康的草鱼为试验对象，初始体质量（50．63±0．43）g，在室内[（22±3）℃]单循环控温养殖系统中进行8周生长试验，以鱼粉为动物蛋白源，去皮豆粕为植物蛋白源，去皮豆粕分别替代0％、15％、30％、45％和60％的鱼粉蛋白，配制成5种等蛋白（W=30％）等能（15．6MJ·kg^-1）的半精制饲料，探讨大豆蛋白对草鱼生长及饲料利用的影响．结果表明，草鱼的特定生长率（SGR）各组之间差异不显著（P〉0．05）；随着大豆蛋白替代水平的增加，饲料效率（FER）、蛋白质效率（PER）及蛋白质沉积率（PPV）逐渐增加，60％组开始下降，但仍显著高于对照组（P〈0．05）．因此，在此试验条件下，草鱼配合饲料蛋白水平为w=30％时，大豆蛋白替代鱼粉蛋白的最适宜量为45％．最大替代量为60％．过量添加大豆蛋白，将影响草鱼的生长及饲料利用．

英文摘要：

Effects of different levels of dietary soybean protein on growth performance and feed utilization of ctenopharyngondon idellus were studied. A growth trial was conducted on juvenile fish with initial body mass of （50.63±0. 43 ） g for 8 weeks at controlled temperature （22±3 ）℃ in single recireulating system. Fish meal and dehulled soybean meal were used as protein source. Five isonitrogenous （w=30% protein） and isoenergetic （ 15.6 MJ·kg^-1 ） diets, with dehulled soybean meal replacing level 0%, 15% , 30% , 45% and 60% of fish meal protein, were formulated to feed juveniles. The results indicated that there were no significant differences （ P 〉 0.05 ） among different groups in specific growth rate ; With increasing of soybean protein replacement level, feed efficiency rate, protein efficiency rate and productive protein value increased gradually, although the decreasing trend was observed when replacement level reached 60%, they were significantly （P 〈 0. 05） higher than that of the control group. It was suggested that the optimum replacement level for fish meal protein by soybean protein was 45% and maximum replacement level was 60% when the protein level of feed was 30%. Excessive soybean protein would produce negative responses on growth performance and feed utilization of Ctenopharyngondon idellus.