【摘要】 [目的]研究“两坝三区”尾水处理系统中不同生态模式的水质变化，为优化中华鳖生态养殖的尾水处理技术提供基础数据。[方法]以中华鳖生态套养模式为主体，于6—9月期间，连续监测并比较套养四大家鱼和克氏原螯虾塘2种模式下，养殖系统进水口、池塘、三级净化区和出水口水质变化。[结果]2种套养模式中池塘TN、NH₃-N、COD_Mn、TSS较高，Ⅱ级净化区TN、TP、NH₃-N、COD_Mn去除率要整体高于Ⅰ、Ⅲ级净化区；克氏原螯虾套养塘进水口营养盐浓度相对较高，去除率无明显规律，10月3个净化区TN、NH₃-N和TSS去除率差异较大。2种套养模式出水口中所测营养盐浓度范围均未超出江苏省强制性排放标准。[结论]“两坝三区”尾水处理系统对中华鳖生态养殖塘中的营养盐浓度有较好的处理效果。更多还原

【Abstract】 [Objective] To study water quality changes under different modes in “two dams and three zones” tailwater treatment system, provide basic data for optimizing tailwater treatment technology of ecological aquaculture of Chinese soft shelled turtle.[Method]Based on the ecological nesting model of Chinese soft shelled turtle, the changes of water quality in the inlets, ponds, tertiary purification areas and outlets of the four famous domestic fishes and Procambarus clarkii ponds from June to October were monitored and compared.[Result]The results showed that the pond TN,NH₃-N,COD_Mn and TSS were higher in the two intercropping modes, and the removal rates of TN,TP,NH₃-N and COD_Mn in the Grade II purification area were higher than those in the Grade I and Grade III purification areas as a whole; the nutrient concentration at the inlet of the lobster nesting pond is relatively high, and the removal rate has no obvious pattern. In October, there were significant differences in the removal rates of TN,NH₃-N,and TSS among the three purification zones.The range of nutrient concentration measured in the two intercropping modes did not exceed the mandatory discharge standards of Jiangsu Province.[Conclusion]The “two dams and three zones” tailwater treatment system has a good treatment effect on the nutrient concentration in the ecological breeding pond of Chinese soft shelled turtles.更多还原