酶解豆粕蛋白替代鱼粉对凡纳滨对虾生长、饲料利用和消化酶的影响

Effects of enzymolytic soybean meal replacing fish meal on growth,feed utilization and digestion enxymes for Litopenaeus vannamei

试验旨在研究酶解豆粕蛋白替代部分鱼粉对凡纳滨对虾(Litopenaeus vannamei)生长、饲料利用及消化酶的影响。选用初始体质量为(1.10±0.02)g的健康对虾,随机分成5组,饲养在0.5 m3的玻璃纤维钢桶中,分别投喂酶解豆粕蛋白(0、7.40%、14.80%、22.20%和30.20%)替代基础配方中鱼粉(0、25%、50%、75%和100%)制成5组等氮等脂的饲料,试验时间为56 d。试验结果显示投喂25%和50%的酶解豆粕蛋白替代鱼粉的凡纳滨对虾增重率、特定生长率、饲料系数和蛋白质效率等无差异统计学意义(P>0.05),替代25%组和替代50%组凡纳滨对虾肝胰腺的蛋白酶和淀粉酶活性显著高于对照组(P<0.05)。研究结果表明,凡纳滨对虾饲料中酶解豆粕蛋白替代鱼粉的比例不宜超过50%。

The aim of this paper was to study the effects of enzymolytic soybean meal protein replacing fish meal on the growth,feed utilization and digestive enzymes for Litopenaeus vannamei.Healthy shrimps with initial weight of(1.10±0.02)g were randomly divided into 5 groups and fed with 5 five isoprotein and isolipid diets that contains different levels of enzymatic soybean meal(0,7.40%,14.80%,22.20%and 30.20%)correspondingly replacing fish meal(0,25%,50%,75%and 100%)in a basic formula.Shrimps were cultured in 0.5 m3 fiberglass buckets for 56 d.The results showed that no significant difference was observed in the weight gain rate,specific growth rate,feed coefficient,protein efficiency of shrimp bewteen the group at 25%level of replacement and the group at 50%level of replacement.The activities of protease and amylase in the hepatopancreases of shrimp fed with diets of groups at 25%and 50%level of replacement were significantly higher than those of control group(P<0.05).The results indicated that the proportion of enzymolytic soybean meal replacing fish meal should be no more than 50%.