高脂饲料中添加发酵桑叶对杂交鳢生长性能、体组成及血清生化指标的影响

本试验旨在研究高脂饲料中添加发酵桑叶对杂交鳢生长性能、体组成及血清生化指标的影响。选用体质健壮、平均体重为10g的杂交鳢360尾,随机分成3个组,每个组设4个重复,每个重复30尾。各组投喂在高脂饲料中分别添加0(对照组)、7.5%和15.0%发酵桑叶的试验饲料。试验期8周。结果表明:1)与对照组相比,15.0%发酵桑叶组杂交鳢的特定生长率(SGR)和蛋白质效率(PER)显著降低(P0.05),饲料系数(FCR)显著增加(P0.05);7.5%发酵桑叶组杂交鳢的SGR、PER和FCR无显著差异(P0.05)。各组杂交鳢的摄食率(FR)无显著差异(P0.05)。2)与对照组相比,7.5%和15.0%发酵桑叶组杂交鳢的全鱼粗脂肪含量以及肝体比、脏体比和肠脂比显著降低(P0.05),15.0%发酵桑叶组杂交鳢的肝脏脂肪含量显著降低(P0.05)。各组杂交鳢的全鱼粗灰分、粗蛋白质以及肌肉脂肪含量均无显著差异(P0.05)。3)与对照组相比,15.0%发酵桑叶组杂交鳢的血清谷草转氨酶和谷丙转氨酶活性以及总胆固醇、甘油三酯含量显著降低(P0.05);7.5%和15.0%发酵桑叶组杂交鳢的血液葡萄糖含量显著降低(P0.05)。各组杂交鳢的血清总蛋白含量均无显著差异(P0.05)。由此可见,高脂饲料中添加7.5%发酵桑叶不会影响杂交鳢的生长性能,而添加15.0%发酵桑叶会抑制杂交鳢的生长,但有利于肝脏健康,改善机体的糖脂代谢。

Effects of High-Fat Diet Supplemented with Fermented Mulberry Leaves on Growth Performance,Body Composition and Serum Biochemical Indexes of Hybrid Snakehead

This experiment was conducted to study the effects of high-fat diet supplemented with fermented mulberry leaves on growth performance,body composition and serum biochemical indexes of hybrid snakehead.A total of 360 healthy hybrid snakehead with the average body weight of 10 g were randomly divided into 3 groups with 4 replicates per group and 30 fish per replicate.Fish in the 3 groups were fed the high-fat diet supplemented with 0 (control group),7.5% and 15.0% fermented mulberry leaves,respectively.The experiment lasted for 8 weeks.The results showed as follows: 1) compared with the control group,the specific growth rate (SGR) and protein efficiency rate (PER) of hybrid snakehead in 15.0% fermented mulberry leaves group were significantly decreased (P<0.05),but the feed conversion rate (FCR) was significantly increased (P<0.05);the SGR,PER and FCR of hybrid snakehead in 7.5% fermented mulberry leaves group had no significant difference (P>0.05).There was no significant difference in feeding rate (FR) of hybrid snakehead among all groups (P>0.05).2)Compared with the control group,the lipid content of whole body,hepatosomatic index,viscerosomatic index and intraperitoneal fat ratio of hybrid snakehead in 7.5% and 15.0% fermented mulberry leaves groups were significantly decreased (P<0.05),and the liver lipid content of hybrid snakehead in 7.5% fermented mulberry leaves group was significantly decreased (P<0.05).There were no significant differences in the contents of whole body crude ash,whole body crude protein and muscle lipid of hybrid snakehead among all groups (P>0.05).3) Compared with the control group,the glutamic-oxalacetic transaminase and glutamic-pyruvic transaminase activities and total cholesterol and triglyceride contents in serum of hybrid snakehead in 15.0% fermented mulberry leaves group were significantly decreased (P<0.05),and the blood glucose content of hybrid snakehead in 7.5% and 15.0% fermented mulberry leaves groups was significantly decreased (P<0.05).There was no significant difference in serum total protein content of hybrid snakehead among all groups (P>0.05).In conclusion,high-fat diet supplemented with 7.5% fermented mulberry leaves has no effects on growth performance of hybrid snakehead,while supplemented with 15.0% fermented mulberry leaves can decrease the growth of hybrid snakehead,but it is good for liver health,and can improve the body glucolipid metabolism.