花生粕替代豆粕对草鱼生长性能的影响

Effects of soybean meal replaced by peanut meal on growth performance in garss carp

为研究日粮中不同比例花生粕替代豆粕对草鱼生产性能的影响,试验将4800尾体重为250 g左右草鱼随机平均分为4组,每组3个重复,每个重复400尾鱼,试验在网箱(4 m×4 m×3.0 m)中进行,持续90 d。对照组日粮中豆粕比例为16%,各试验组以等量花生粕分别替代对照组日粮中25%、50%、75%的豆粕。结果表明:花生粕替代75%豆粕显著降低了草鱼种的增重率(P<0.05)、显著提高了饵料系数(P<0.05),花生粕替代50%和25%豆粕,草鱼增重率和饵料系数与对照组无显著差异(P>0.05)。花生粕替代豆粕对草鱼体成分影响不显著(P>0.05),75%替代组草鱼肥满度显著降低(P<0.05)。由此可见,本试验条件下,草鱼饲料中花生粕替代豆粕的比例为50%,即添加量为8%不影响草鱼生长性能。

A 90-day feeding experiment was conducted in floating cages （4 m × 4 m × 3.0 m） to determine the po- tential use of peanut meal as a partial replacement of soybean meal in diet for grass carp with an initial average weight of about 250 g.Diets were formulated to include 0.25%, 50%, 75% of soybean meal being substituted by peanut meal with ly- sine supplementation.The results showed that：weight gain rate decreased significantly （P 〈 0.05） when the replacement level was 75%,and feed coefficient increased significantly （P 〈 0.05）.Compared with control group,weight gain rate and feed coefficient of 25% and 50% replacement groups showed no significant difference.There were no significant differences in the moisture, lipid, crude protein and ash content of whole body among all groups and relative fatness of 75% replace- ment group decreased significantly （P 〈 0.05）.Results of this trial indicated that the optimum level of soybean meal re- placement with peanut meal was 50%, on the basis of maximum weight gain.