Abstract: Koi carp Cyprinus carpio with initial body weight of(195.88±0.98)g was fed three kinds of diets,Japanese 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 triplication 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 Japanese 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 pigmentation 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.
2017, Vol. 32 
