作　　者： ; ; ; ; ; ;

机构地区： 广东省农业科学院

出　　处： 《动物营养学报》 2008年第5期540-546,共7页

摘　　要： 选用720尾初始体重(4.10±0.02)g的草鱼,随机分为6组,每组4个重复,每个重复30尾。Ⅰ组为对照组,饲喂基础日粮,Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ组为试验组,分别饲喂在基础日粮中添加还原型谷胱甘肽(GSH)100、200、300、400和500mg/kg的日粮,试验期为8周,观察谷胱甘肽对草鱼生长性能、血液生化指标、营养组成及内脏器官相对重量的影响。结果显示:与对照组相比,各试验组第4周的增重率和特定生长率呈升高趋势,其中Ⅱ组的增重率和特定生长率显著升高(P<0.05);添加较高剂量GSH(≥300mg/kg)试验组血清尿素氮含量降低,其中Ⅵ组显著降低(P<0.05);各试验组血清胆固醇含量和谷丙转氨酶活力升高,其中Ⅳ和Ⅵ组胆固醇含量显著升高(P<0.05),Ⅳ组谷丙转氨酶活力显著升高(P<0.05);各试验组全鱼粗蛋白质含量升高,其中Ⅴ和Ⅵ组显著升高(P<0.05);各组的干物质、粗脂肪和灰分含量以及内脏器官相对重量差异不显著。结果表明,日粮中添加一定量的GSH能够显著提高草鱼初期的生长性能,促进鱼体营养代谢,提高全鱼蛋白质含量,对内脏器官相对重量没有显著影响;但添加高剂量GSH可能对肝脏造成一定损伤。 An 8 weeks feeding trial was conducted to study the effects of dietary glutathione on growth performance, serum biochemical indices and body composition of juveniles grass carp, Ctenopharyngodon idella. Seven hundred and twenty grass carps with an average body weight of （4.10±0.02） g were randomly allocated into 6 groups with 4 replicates of 30 fish. Group Ⅰ , as the control group, was fed with the basal diet, while group Ⅱ , Ⅲ, Ⅳ, Ⅴ and Ⅵ, as trial groups, were fed with the basal diet added with 100, 200, 300, 400 and 500 mg/kg GSH respectively. The results showed that when compared with the control group, WGR and SGR were improved at 4^th week and showed a significant increase in group Ⅱ （P〈0.05）. Adding high levels of GSH（≥300 mg/kg）to diet reduced serum UN content and showed a significant decrease in group IV （P 〈0.05）. Activity of serum CHO was increased and showed a significant increase in group Ⅳ and Ⅵ （P〈0.05）. Adding GSH to diet could improve serum content GPT and showed a significant increase in group Ⅳ （P〈0.05）. Whole-fish protein content was increased and showed a significant increase in group Ⅴ and Ⅵ （P〈0.05）. Whole-fish dry matter, lipid, ash and relative weight of organs were not influenced by adding different levels of GSH （P〉0.05）. In conclusion, early growth performance, nutrition metabolism and whole-fish protein content could be improved by adding GSH, while relative weight of organs were not affected significantly. However, adding high levels of GSH in diet could result in impaired liver function in fish.

关 键 词： 生长性能 血液生化指标 体组成 草鱼

领　　域： [农业科学] [农业科学] [环境科学与工程]