中华绒螯蟹蟹种配饵中豆饼替代部分鱼粉的适宜含量

EVALUATION OF SOYBEAN CAKE AS A SUBSTITUTE FOR PARTIAL FISH MEAL IN FORMULATED DIETS FOR CHINESE MITTEN-HANDED CRAB JUVENILE

摘要:

本试验以不同比例的豆饼、鱼粉为主要蛋白源,配以菜饼、麸皮、玉米粉、复合维生素和无机盐等组成五组精制饵料,配饵的蛋白质含量为36.64~37.23%,脂肪2.75~3.10%,动、植物蛋白比1:0.13~2.43,每公斤饵料合总能451.51~462.23千卡.在室内水泥.池中用上述配饵时规格约5克的蟹种进行精心喂养40天,试验期间水温控制在24±1℃,试验结束时,以饵料的必需氨基酸组成、河蟹的特定生长率、饵料蛋白质利用率、蟹体生化组成等作为评价指标,结果表明,蟹种实用配饵中用30%左右的豆饼替代鱼粉是合适的.豆饼添加过量或不足均会造成配饵中某些必需氨基酸比例失调而降低蟹的生长速度.

关键词:中华绒螯蟹;配合饵料;豆饼含量

Abstract:

The suitable soybean ca,l;e as a substitute for partial fish meal informulated diets for the Chinese mitten-handed crab,Eriocheir sinensis, was studi-ed. The tested material was purified diet consisting of different contents ofsoybean cake, fish meal and maize flour, etc. The tested diets were divided intofive groups containing 36 .64-37.2300 of protein, 2.75-3.10% of lipid and452.51-462.23 KCaI/kg of energy，and animal-vegetable protein ratio was1:0.13-2.43. The experiment results indicated that 30% soybean cake as a sub-stitute for partial fish meal in formulated diets for the crab juvenile was suit-able, taking the essential amino acids of the diets，specific growth rate, proteinutilization ratio and the nutrional composition of the crab，etc, as evalution indicesafter 40 days feeding experiment at 24士10C. The insufficient or excessive soybeancake content in diets caused the essential amino acids' imbalance and decreasedthe growth rate of the crab.

Key words:Chinese mitten-handed crab;Eriocheir sinensis;formulated diet;soybean cake content