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对3种不同类型山塘即:引用城市生活污水养鱼的池塘(简称Ⅰ型塘);农村住宅附近水源较杂的池塘(简称Ⅱ型塘);引用库水养鱼的池塘(简称Ⅲ型塘)的NH_3-N、NO_2-N、NO_3-N进行了测定,NH_3-N含量Ⅰ、Ⅱ、Ⅲ型塘分别为2.97、0.251、0.751mg/L;NO_2-N含量Ⅰ、Ⅱ、Ⅲ型塘分别为0.156、0.049、0.053mg/L;NO_3-N含量Ⅰ、Ⅱ、Ⅲ型塘分别为0.074、0.131、0.120mg/L。研究结果表明Ⅰ型塘水质污染非常严重,不经处理已不能养鱼;Ⅲ型塘已受到较重的污染,需进行水质调节;Ⅱ型塘也受到轻度污染。
Three kinds of ponds are referred to as: ponds (referred to as type I ponds) which refer to urban domestic sewage and fish ponds; ponds with more water sources near rural residences (Type II ponds); ponds The NO3-N, NO2-N and NO3-N contents of type I, II and III of NH3-N were 2.97,0.251 and 0.751 mg / The ponds were 0.156, 0.049 and 0.053 mg / L, respectively. The NO3-N contents of type I, II and III ponds were 0.074, 0.131 and 0.120 mg / L, respectively. The results showed that the water quality of type Ⅰ pond was very serious and could not be raised without treatment. Type Ⅲ ponds were heavily polluted and water quality adjustment was required. Type Ⅱ ponds were slightly polluted.