近年来，近海鱼类养殖正逐步向工厂化、集约化方向发展。但同时，由于养殖业的不规范、致使海水鱼养殖出现了一系列问题，尤其是饲料的品质差、鱼种体质弱、放养密度高及病害严重等，已成为目前困扰海水鱼养殖的主要问题。 １、溶氧问题 溶氧的缺乏会导致饲料转化率降低从而间? In recent years, offshore fish farming is gradually developing in a factory-oriented and intensive manner. However, at the same time, due to the non-standard breeding industry, a series of problems have emerged in marine fish farming. In particular, the poor quality of feed, the weak constitution of fish species, the high stocking density and the serious disease have become the major problems currently plaguing marine fish farming . 1, dissolved oxygen problems Dissolved oxygen will lead to reduced feed conversion rate?