一、河蟹池塘养殖生态环境的退化1.养殖水源环境污染水产养殖赖以生存的外界水域环境的污染,已成为当前制约水产养殖发展的关键问题之一。改革开放以来,由于工业化和城市化迅速推进,现代农业也改变了传统农业作业方式,各地外界水域不同程度地受到来自工业、农业、生活等污染源 First, crab pond aquaculture degradation of the ecological environment 1. Aquaculture water pollution Environmental aquaculture survival of the external water environment pollution, has become the current constraints of aquaculture development, one of the key issues. Since the reform and opening up, due to rapid industrialization and urbanization, modern agriculture has also changed the traditional mode of agricultural operations, outside the water around the varying degrees of pollution from industry, agriculture, life and other sources