长期的养殖生产以及实行承包责任制后出现的只注重利用,忽视维护管理的短期行为,使得池塘生态环境日趋恶化,生产性能越来越差,鱼病频发,经济效益下降。因此,加强池塘生态环境保护,防止、减轻池塘水质恶化,促进水产养殖业持续发展,是广大水产科技工作者的一项重要课题。本文以1995—1996年对地处珠江三角洲的新会、南海、顺德、高明和广州五市七个 Long-term aquaculture production and short-term behavior that only focus on utilization and neglect of maintenance and management after the implementation of contract responsibility system make the ecological environment of pond deteriorate day by day, the production performance is getting worse, the frequency of fish diseases is frequent, and the economic benefits are declining. Therefore, strengthening the ecological environment protection of ponds, preventing and reducing the deterioration of pond water quality and promoting the sustainable development of aquaculture is an important issue for aquatic science and technology workers. This article from 1995 to 1996 on the Pearl River Delta is located in the Xinhui, Nanhai, Shunde, Gaoming and Guangzhou five cities seven