苏锡常农村地表水氨氮含量时空变异特征及影响因素分析

Temporal and Spatial Variation Characteristics and Influencing Factors of Ammoniac Nitrogen Content in Rural Surface Water in Suzhou,Wuxi and Changzhou

从2006年春季至2008年秋季,对苏锡常农村地表水中的氨氮含量进行了监测和分析。结果表明:常州市农村地表水氨氮污染较严重,其次是无锡市,苏州氨氮含量一直最低;3个市地表水中的氨氮含量近几年均呈降低趋势,秋季的氨氮含量低于春季,且氨氮含量随降雨量的增加而呈下降趋势;地表水中的氨氮含量与单位水域面积肉类总产量和化肥施用强度均呈正相关性。

The study monitored and analyzed the ammoniac nitrogen content in rural surface water in Suzhou,Wuxi and Changzhou from spring of the year 2006 to autumn of the year 2008.The results showed that the ammoniac nitrogen pollution in Changzhou was serious,followed by that in Wuxi city,and that in Suzhou was light.The ammoniac nitrogen content in the surface water of these 3 cities had a decreasing trend in recent years,and it decreased with the increase in rainfall.The ammoniac nitrogen content in autumn was lower than that in spring.In addition,the ammoniac nitrogen content in the surface water was positively correlated with the meat total production per unit water area and the intensity of chemical fertilizer application.