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在基础饲料中分别添加喹乙醇、万能肥素、大蒜、螺旋藻、刺五加、黄芪 ,研究这几种抗病促生长剂对银鲫生长和免疫力的影响。结果表明 ,喹乙醇组和螺旋藻组在 6周内增重率分别比对照组提高了 6 0 6 %和 8 91% ,饲料效率比对照组提高了 5 76 %和 8 4 6 % ;饲养 16周后 ,螺旋藻组增重率和饲料效率分别比对照组提高 19 17%和 3 86 %。从各种抗病促生长剂对银鲫免疫力的影响来看 ,大蒜、螺旋藻、刺五加、黄芪对银鲫血清溶菌酶活性、SOD酶活性具有显著的促进作用 ,而喹乙醇、万能肥素具有一定免疫抑制作用但不显著。螺旋藻是理想的抗病促生长剂
Olaquindox, Magnaporthe giganteum, Garlic, Spirulina, Acanthopanax senticosus, Astragalus membranaceus were respectively added into the basal diet to study the effects of these anti-growth promoters on growth and immunity of silver crucian carp. The results showed that the weight gain rate of olaquindox group and spirulina group increased by 6 0 6% and 8 91% respectively over the 6 weeks, and the feed efficiency increased by 5 76% and 84 6% compared with the control group. After week, the weight gain rate and feed efficiency of Spirulina group were increased by 19 17% and 386% respectively compared with the control group. The effects of various disease-resistance growth-promoting agents on the immunity of silver crucian carp showed that garlic, Spirulina, Acanthopanax senticosus and Radix Astragali had a significant promotion on the activity of lysozyme and SOD of silver crucian carp. However, Superoxide has some immunosuppressive effects but not significant. Spirulina is the ideal anti-growth agent