一、我国水产养殖业存在的主要问题 　　1.养殖水域环境条件恶化 　　近年来，随着水污染的日益加重和水产养殖业的迅速发展，水体环境和养殖业的相互影响、相互制约的关系日益明显。 90年代以来，我国每年废水排放量约为 400亿吨，其中约有 80％未经处理直接排放。 　　1997年 First, the main problems of aquaculture in our country 1. The deterioration of environmental conditions in aquaculture waters In recent years, with the increasing water pollution and the rapid development of aquaculture, the interaction between water environment and aquaculture has become more and more obvious . Since the 1990s, China’s annual wastewater discharge is about 40 billion tons, of which about 80% of untreated directly discharged. 1997