论文部分内容阅读
采用网格分区法在巢湖周边地区设置了60个采样单元,采取表层土样分析了总氮(TN)、有机质(OM)的空间分布特征。结果表明:(1)表层土壤w(TN)平均值为1 027 mg/kg,变化范围253 mg/kg~2 273 mg/kg,变异系数为46.3%;w(OM)平均值为1.95%,变化范围0.291%~5.48%,变异系数为49.3%。(2)表层土壤w(TN)、w(OM)高浓度地区主要集中在东部的柘皋河、兆河区域,低浓度地区主要集中在西部的派河、南淝河—店埠河区域。(3)巢湖周边地区土壤总氮、有机质空间分布与区域内入湖河流、巢湖水质、巢湖沉积物污染空间分布不一致。
Sixty sampling units were set up in the surrounding area of Chaohu Lake by grid partition method. The surface soil samples were used to analyze the spatial distribution of total nitrogen (TN) and organic matter (OM). The results showed that: (1) The mean value of surface soil w (TN) was 1027 mg / kg and the variation range was 253 mg / kg ~ 2773 mg / kg, the coefficient of variation was 46.3% The range of variation is 0.291% ~ 5.48%, the coefficient of variation is 49.3%. (2) High concentrations of surface soil w (TN) and w (OM) mainly concentrated in the Qionggao River and Zhaohe River in the east and low concentrations in the Paihe and Nanbianhe - Dianbu River areas in the west. (3) The spatial distribution of total nitrogen and organic matter in the soil around Chao Lake is inconsistent with the spatial distribution of the sediment pollution in Chaohu Lake, Chaohu Lake and the lake.