广西桂东北地区农业土壤环境若干重金属元素背景值的调查

Study on Background Values of Some Heavy Metal in Agricultural Soils of Northeast Guangxi Province

摘要: 应用分层抽样统计方法,调查研究广西桂东北地区农业土壤环境Cu、Zn、Pb、Cd、Ni、As、Cr、Hg等8种重金属元素背景值,并分别求算出各元素背景值95％的置信区间。经方差分析,各成土母质间几种元素背景值都有不同程度差异。探讨了该区域农业土壤元素背景值与世界土壤、地壳丰度和国内土壤元素背景值的差异,为开展农业环境科学研究提供依据。

Abstract: The background values of Cu , Zn, Pb, Cd, Ni,Cr, As and Hg in agricultural soils of northeast Guangxi Province are investigated by means of classified sampling statistics. And 95% believable ranges of background values for these element are respectively reckoned. Through variance analysis, it is verified that there are differences in background values of some elements among types of parent material. Soil background values of these elements in the area are compared with other soils from China and world as well as the earth crust abundance. This provides basis for the study of agricultural environment in this area.