草鱼以其肉质好深受消费者喜爱而成为常规养殖品种中的佼佼者。然而,长期以来人们一直认为草鱼是一种典型的草食性鱼类,采取投喂青饲料、旱草、水草和农作物秸秆的方法喂养。由于这些植物性饲料粗纤维含量高,蛋白质等有效营养成分少,草鱼摄食后不易消化吸收。草鱼的排泄物进入水中后,大量有机物在水 Grass carp is well-liked by consumers for its fleshy quality and has become a leader in conventional farmed species. However, it has long been thought that grass carp is a typical herbivorous fish fed on green fodder, dry grass, aquatic plants and crop straws. Due to the high crude fiber content of these plant-derived feedstuffs and their low effective nutrients such as protein, grass carp is not easily digested and absorbed after ingestion. Grass carp excrement into the water, a large number of organic matter in the water