饲料中添加植酸酶对大口黑鲈生长和消化酶活性的影响  

Effects of phytase on growth and digestive enzyme activities in largemouth bass Micropterus salmoides

作　　者：牛纪锋[1,2] 吴锐全[1] 谢骏[1] 王广军[1] 关胜军[1,2] 

机构地区：[1]中国水产科学研究院珠江水产研究所,广州510380 [2]广东海洋大学水产学院,湛江524088

出　　处：《大连水产学院学报》2010年第2期132-136,共5页Journal of Dalian Fisheries University

基　　金：广东省科技计划项目(2004B20301005);中国水产科学研究院人才基金项目

摘　　要：用添加不同水平植酸酶(0、500、1 000、1 500 U/kg)的饲料喂养初始体重为23 g左右的大口黑鲈Micropterus salmoides56 d,研究植酸酶对大口黑鲈生长和消化酶活性的影响。结果显示:饲料中添加1 000U/kg植酸酶能显著促进大口黑鲈的生长,降低饲料系数(P<0.05)。1 000、1 500 U/kg组大口黑鲈胃蛋白酶活性较对照组分别提高了28.14%和20.09%,差异显著(P<0.05);各处理组鱼幽门盲囊中蛋白酶活力与对照组相比差异显著(P<0.05),而肠道中蛋白酶活性差异不显著(P>0.05)。与对照组相比,各处理组鱼肝胰脏和肠淀粉酶活性有所提高,但差异不显著(P>0.05);1 000、1 500 U/kg组大口黑鲈的胃淀粉酶活性有所降低,但差异不显著(P>0.05)。A 56 day feeding trail was conducted to evaluate the effects of dietary phytase levels（0,500,1 000,and 1 500 U/kg） on growth and digestive enzyme activities in largemouth bass Micropterus salmoides with initial body weight about 23 g.The results showed that the fish fed the diets containing 1 000 U/kg phytase had significantly better growth and lower feed conversion ratio（P〈0.05）.The hepatopancreas index was found to decrease with increase in dietary phytase levels,with the minimum in the fish fed the diet containing 1 500 U/kg phytase,significantly different from the control.There were 28.14% and 20.09% higher protease activities in the stomach of the fish fed the diets containing 1 000 U/kg and 1 500 U/kg phytase than that in the control group（P〈0.05）.The pylorus protease activities were found higher in the experimental groups than that in the control group（P〈0.05） without significant differences in gut protease activities.The amylase activities in the liver and gut showed increase with the phytase addition,but not significantly different level（P〉0.05）.The fish fed the diets containing 1 000 U/kg and 1 500 U/kg phytase had lower amylase activities in the stomach without significant difference（P〉0.05）.

关 键 词：植酸酶 大口黑鲈 生长 蛋白酶 淀粉酶 

分 类 号：S963.73[农业科学—水产养殖]