盐城市郊区淡水养殖依靠“四改”增效益改革开放以来，盐城市郊区淡水养殖业高速发展，养殖面积已达１５万亩，市场水产品十分丰富，随之也出现了一些新情况，市场鱼价稳中有降，常用饲料价格上升，养鱼的比较效益下降。为了持续稳定发展水产养殖业，该区近几年在试验的基... Yancheng suburbs of freshwater aquaculture rely on “four changes” to increase efficiency Since the reform and opening up, the rapid development of freshwater aquaculture Yancheng suburbs, aquaculture area has reached 15 hectares, the market is very rich in aquatic products, followed by some new situations have also emerged, the market fish Price steady decline, the price of commonly used feed increased, the comparative benefit of fish decreased. In order to continue the steady development of aquaculture industry, the area in recent years in the experimental base ...