论文部分内容阅读
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。
In this experiment, soybean meal and fish meal with different proportions were used as main source of protein, and five groups of refined bait were composed of vegetable cake, bran, corn meal, multivitamin and inorganic salt. The content of protein in bait was 36.64 ~ 37.23 %, Fat 2.75 ~ 3.10%, animal and plant protein ratio 1: 0.13 ~ 2.43, the total amount of 451.51 ~ 462.23 kcal per kg of feed can be. Interior cement. The pool with the bait when the specifications of about 5 grams of crab species were carefully fed for 40 days, the water temperature during the test control at 24 ± 1 ℃, the test ends, the essential amino acid composition of the feed, the specific growth rate of crab, feed protein utilization Rate, the biochemical composition of the crab body as an evaluation index, the results show that the practical use of bait crab with about 30% of the soybean meal instead of fish meal is appropriate. Any excess or deficiency of bean cake can result in imbalance of certain essential amino acids in the bait and reduce the growth rate of the crab.