【摘要】 依据实际调查资料，运用概率统计原理对评价区土壤中铅、锌、镉、砷４元素的分布规律进行了探讨，在背景值判别方面合理地运用了富集数法和表底土比较法，给出了符合该地区土壤环境的４种元素背景值。更多还原

【Abstract】 This paper has discussed distributive law of Pb、Zn、Cd and As 4 elements in soil of the appraisal district with real survey data and probability statistics principle,reasonably used concentra coefficient method and comparison method of the surface soil with the botlom soil in back-ground value,it gare back-ground value with accord with 4 elements in soil environment of this district.更多还原