饲料在水中的流失和排泄物的积累成为水体的主要污染源，导致水质的恶化，病原体大量繁殖，病原菌的毒性增强，感染率的提高，造成成活率下降，用药量增加，换水频繁，是成本上升的主要原因，这是粉状饲料在甲鱼养殖中突出的弊病，特别是水下投喂，饲料有效成分的流失更大。甲 The loss of feed in the water and the accumulation of excreta become the major sources of water pollution, resulting in the deterioration of water quality, the multiplication of pathogens, the increase of the virulence of pathogens, the increase of infection rate, the decrease of survival rate, the increase of dosage, frequent water changes, and the cost The main reason for the rise is that this powdery feed is prominent in soft-shelled turtle breeding. Especially when it is fed underwater, the loss of the active ingredient in the feed is even greater. A