饲料中不同添加剂组合对锦鲤生长和体色的影响

为研究饲料中不同添加剂组合对锦鲤Cyprinus carpio(初始体质量为195.88 g±0.98 g)生长和体色的影响,并与日本优质锦鲤商品饲料进行增重和增色效果对比,进行了增重和增色两部分试验,其中增重部分以三色锦鲤为研究对象,探讨了试验增重饲料与商品增重饲料对其生长的影响,增色部分以红白锦鲤为研究对象,探讨了试验对比饲料、试验增色饲料和商品增色饲料对其体色的影响,各组均设3个重复,试验周期为60 d,每隔15 d测定锦鲤的生长和体色指标。结果表明:添加L-肉碱、血球蛋白粉、螺旋藻和枯草芽孢杆菌的试验饲料对三色锦鲤的促生长效果与商品增色料无显著性差异(P0.05),但试验饲料具有更低的饲料系数;添加虾青素、螺旋藻和枯草芽孢杆菌的试验饲料对红白锦鲤体色的增艳效果与商品增色料无显著性差异(P0.05);投喂两种试验增色料和商品增色料的锦鲤体表各部位对色素的沉积程度相似。研究表明,采用不同添加剂组合的两种试验饲料与日本优质锦鲤饲料的功效水平相当,能够分别满足对锦鲤快速增重和增色的要求。

Effects of different additive combination in diets on growth and body pigmentation of koi carp Cyprinus carpio

Koi carp Cyprinus carpio with initial body weight of (195. 88±0. 98)g was fed three kinds of diets, Jap-anese commercial diet ( as control) and the diets containing growth-promoting additive complex ( L-carnitine, blood-cell protein meal, Spirulina powder and Bacillus subtilis powder ) , and pigmentation-promoting additive complex (astaxanthin,spirulina and Bacillus subtilis) at water temperature of (25±1)℃ for 60 days with triplica-tion to investigate effects of different additive combination in diets on growth and body pigmentation of koi carp. Growth performance and body pigmentation of koi carp were determined every 15 days during the 60 d experimental period. Results showed that the koi carp fed the diets containing growth-promoting additive complex and Japanese commercial diets showed similar growth performance, with lower food conversion ratio than the koi carp fed the Jap-anese diets. The diets containing pigmentation-promoting additive complex led to improve the body pigmentation of the red and white koi carp, which is comparable to the koi carp fed the control diets. The similar degree of pigmen-tation was observed in the koi carp fed both experimental pigmentation diets, indicating that the two experimental diets with different feed additive combination have the equivalent effects with Japanese commercial diets and that can match the standard in promoting the growth and body pigmentation of koi carp.