草鱼是我国的重要养殖鱼类.关于草鱼是否是真正的草食性鱼类,能否仅利用植物性饵料进行正常生长,目前存在着不同看法.一些研究者认为,草鱼单以植物性饵料为食时,生长率很低,故草鱼属于杂食性鱼类,其食谱中应包括一定比例的动物性饵料.另一些研究者认为,即便是体重很小的草鱼幼鱼,在以适当的水草为食时,亦可获得高的生长率. 本项研究从氮收支的角度探讨以动物或植物性饵料为食的草鱼生长差异形成的原因,以及草鱼对植物性饵料的利用能力. Grass carp is an important culture of China’s fish.Whether grass carp is a real herbivorous fish, can only use plant food for normal growth, there are different views.A number of researchers believe that grass carp alone plant food for food , The growth rate is very low, so the grass carp is omnivorous fish, the diet should include a certain percentage of animal feed.Another researchers believe that even very small grass carp juveniles, eating grass with appropriate water , The high growth rate can also be obtained.This study explored the reasons for the differences in the growth of grass carp fed on animal or plant food from the point of view of nitrogen budget and the ability of grass carp to utilize plant bait.