维生素E对小龙虾生长性能、组织生理指标及肌肉营养成分的影响

Effects of vitamin E on growth performance,tissue physiological indices and muscle nutrients of crayfish

文章旨在研究维生素E(VE)对小龙虾生长性能、组织生理指标及肌肉营养成分的影响,试验选用平均体质量为(3.12±0.58)g的幼虾为研究对象,设置6个处理,每个处理3个重复,每个重复50尾小龙虾,各处理中VE的添加量分别为0,15,30,60,120和240 mg/kg,进行为期60 d的饲养试验。结果表明:饲料中添加120 mg/kg及以上的VE显著提高了小龙虾的增重率,特定生长率和含肉率(P<0.05),显著降低了小龙虾的饲料系数(P<0.05),VE添加量对小龙虾的成活率和肝胰腺指数影响不显著(P>0.05)。饲料中添加120 mg/kg及以上的VE显著提高了小龙虾肠道蛋白酶和脂肪酶的活力,同时显著提高了肝胰腺中过氧化氢酶和超氧化物歧化酶的活力,显著提高了总抗氧化能力,并显著降低了肝胰腺中丙二醛的含量(P<0.05)。饲料中添加120 mg/kg及以上的VE显著提高了小龙虾肌肉中粗蛋白质含量,显著降低了粗脂肪含量(P<0.05)。研究表明,饲料中VE的添加水平可影响小龙虾的生长性能、生理指标及肌肉营养品质,且在本试验条件下最适添加量为120 mg/kg。

In order to determine the effects of vitamin E(VE)on the growth performance,tissue physiological indices and nutrients in muscle of shrimp,young shrimp with an average body weight of(3.12±0.58)g were selected.The supplementation of VE in the basal diet was 0,15,30,60,120,and 240 mg/kg,respectively,and the experiment lasted for 60 days.The results showed that addition of 120 mg/kg VE increased the specific growth rate,weight gain rateand meat content of crayfish significantly(P<0.05).The feed coefficient was significantly decreased(P<0.05).VE supplemental level had no significant effects on survival rate and hepatopancreas index of crayfish(P>0.05).Addition of 120 mg/kg VE increased the activities of intestinal protease and lipase of crayfish significantly(P<0.05).At the same time,the activities of catalase and superoxide dismutase in hepatopancreas were significantly increased,the total antioxidant capacity was significantly increased,and the content of malondialdehyde in hepatopancreas was significantly decreased(P<0.05).Dietary supplementation of 120 mg/kg VE and above significantly increased the crude protein content in muscle of crayfish,and significantly decreased the crude fat content(P<0.05).The results showed that dietary VE supplemental level affected the growth performance,physiological indexes and muscle nutritional quality of crayfish shrimp.And the optimal addition amount under the conditions of this experiment is 120 mg/kg.