不同菜粕水平对草鱼生长、血清生化指标和毒素残留的影响

为考察不同菜粕水平（0～50．0％）对草鱼生长、饲料利用、血清生化指标和毒素残留的影响。对不同体重的草鱼（初始平均体重约5．0g和18．7g）分别进行了8周的饲养试验，结果表明：随着菜粕水平的升高，不同体重的草鱼增重率、特定生长率、饲料转化率、蛋白质效率均有所下降，但在0、10．0％、20．0％和30．0％组没有显著差异；草鱼（初始平均体重约5．0g）肌肉和肝脏中硫代葡萄糖甙、嚷唑烷硫酮和异硫氰酸盐的含量随饲料中菜粕水平的升高而升高；不同菜粕水平对草鱼（初始平均体重约18．7g）血清中的谷草转氨酶、谷丙转氨酶、谷草转氨酶／谷丙转氨酶、总蛋白、白蛋白、球蛋白、白蛋白／球蛋白、尿素氮、血糖、肌肝、B和T3／T4均无显著影响，而对T4和T3＋T4有显著影响，并且对肝脏细胞有不同程度的损害。通过两个试验的研究认为草鱼幼鱼饲料中菜籽粕用量以少于30．0％为宜。

Effects of different rapeseed meal levels on growth,serum biochemical indices and toxins residues in Ctenoparyngodon idellus

Two 8-week feeding trials were conducted to investigate effects of different rapeseed meal levels(0.0-50.0%) on growth, feed utilization,blood biochemical indices and toxins residues in grass carp(Ctenoparyngodon idellus)(average body weight were about 5.0 g and 18.7 g).The results showed that: with the increasing of the rapeseed meal levels,the weight gain rate,specific growth rate,feed efficiency ratio and protein efficiency ratio decreased,but no significant difference was observed in 0.0,10.0%,20.0% and 30.0% groups.Glucosinolate(GLS),isothiocyanate(ITC) and oxazolidine thione(OZT) content in the muscle and liver also increased with the rapeseed meal level increasing in average body weight 5.0 g;In average body weight 18.7 g,there were no significant difference in serum glutamic-oxalacetic transaminase,glutamic-pyruvic transaminase,glutamic-oxalacetic transaminase/glutamic-pyruvic transaminase,total protein,albumin,globin,albumin/ globin,urea nitrogen,glucose,creatinine,T3 and T3/T4,but T4 and T3 T4 levels were significantly lower than those of control,liver cells were damaged.From the two trials,a percentage of no more than 30.0% of rapeseed meal supplementation in the feed was suitable.