Application of alginate oligosaccharide as feed additive in aquaculture

The invention discloses an application of alginate oligosaccharide in aquaculture, and when the alginate oligosaccharide is applied to aquaculture as a growth promoting agent and an immunopotentiator, the addition amount of the alginate oligosaccharide is 0.25%-0.5% of the total weight of feed. The rainbow trout feed has the beneficial effects of promoting growth of rainbow trout, reducing feed coefficient, improving nutritional ingredients of fish meat and improving non-specific immunity, and is remarkable in effect. 本发明公开了一种褐藻寡糖在水产养殖中的应用，它作为促生长剂和免疫增强剂应用于水产养殖时，褐藻寡糖的添加量为饲料总重量的0.25％～0.5％。本发明的有益效果：促进虹鳟鱼的生长、降低饲料系数、改善鱼肉营养成分和提高非特异性免疫力，效果显著。