复合矿物盐添加剂对河蟹生长的影响

Effect of Mineral Mix Additives on the Growth of Chinese Mitten Crab Juvenile

用三种不同配比的复合矿物盐和一种鲤鱼用矿物盐，均按２％的添加量分别掺入到基础饲料中，制成４种试验饲料，喂养平均规格为２．９ｇ／只的幼蟹３０天，观察其生长效果。结果表明，多矿－１号、多矿－２号复合矿物盐具有显著的促生长功效，幼蟹的增重率比对照组分别提高５３．７％和４４．２％；饵料系数比对照组分别降低６９．３％和５８．１％，而添加鲤鱼用矿物盐的试验组，幼蟹的增重率与对照组之间没有显著性差异。

For evaluating the effect of adding mineral mix additives in feed of Chinese mitten crab ( Eriocheir sinensis ) juvenile, four experiment diets were prepared by adding a sort of commercial mineral mix additive for common carp and three sorts of complex mineral mix additives with different mineral ratio to the basic diet in a percentage of 2.0%. Four groups of crab ( mean weight 2.9 g/ind ) were feed with the experimental diets for 30 days, and the results showed that No.1 and No.2 mineral mix additivies had significant effect on speeding up the growth. Weight gain of the crab juvenile fed with No.1 and No.2 additivies were 53.7% and 44.2% respectively higher than that of the control, and feed coefficient were 69.3% and 58.1% lower than that of the control respectively. But there was no significant differece between the weight gain of the group adding commercial mineral mix additive for common carp and that of the control.