基于分等样地的江苏典型区农用地土壤重金属污染研究

    Farmland soil heavy metal pollution in typical areas of Jiangsu Province based on classification sample plots

    • 摘要: 在江苏农用地分等东台、六合-八卦洲、宜兴、昆山4个典型区样地进行土壤样品采集、测试分析与评价的基础上,采用GIS软件Sufer8.0,通过Kriging插值研究了农用地土壤重金属污染及其空间分布特征与规律。结果表明:1)东台农用地土壤重金属污染总体处于安全水平,六合-八卦洲有一定的污染,但总体尚好,宜兴则面临更高程度的污染危险,而昆山部分已经达到轻度污染,这种分布格局与经济发展形式及水平具有很强的相关性;2)4个典型区内部农用地土壤重金属具有各自的空间分布规律及其相应的形成因素;3)通过在分等标准样地土壤样品采集、测试分析,能够较好地揭示不同类型地区农用地重金属污染状况,从而为农用地环境质量管理和农业清洁生产等提供参考。

       

      Abstract: On the basis of collecting, testing, analyzing and evaluating the soil samples in Dongtai, Luhe-Baguazhou, Yixing and Kunshan which were the typical areas of the farmland classification in Jiangsu Province, the spatial distribution characteristics and rules of farmland soil heavy metal pollution were investigated through Kriging interpolation using GIS software Sufer 8.0. The results show that: 1)farmland soil heavy metal pollution is overall at safe level in Dongtai and generally good in Liuhe–Baguazhou, there is a certain degree of risk of heavy metal pollution in Liuhe-Baguazhou and Yixing faces with a higher level of pollution risk, Kunshan was partly lightly polluted. There was a close relationship between the distribution pattern and the form and level of economic development; 2) there are different spatial distributions and forming factors of heavy metals in the farmland soils of the four typical areas; (3) the characteristics of farmland soil heavy metal pollution in different areas are well addressed by collecting, testing, and analyzing the soil samples in farmland classification standard sample plots, which can provide references for the farmland environmental quality management and agricultural cleaner production.

       

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