山西土壤元素背景值及其特征

BACKGROUND VALUES OF SOIL ELEMENTSIN SHANXI AND THEIR DISTRIBUTION FEATURE

作者在全省范围内布设土壤采点２５５个，利用近代分析测试手段，数理统计方法对６１种土壤元素进行了测试分析和数据处理，获得了６１种土壤元素背景值。与世界土壤相对比，山西土壤元素背景值除Ｍｇ高于世界土壤范围值，Ｉｎ低于世界土壤范围值外，其余元素的背景值均在世界土壤范围值之内。与中国土壤相比，在山西６１种土壤元素背景值中，Ｃｕ，Ｃｄ，Ｎｉ，Ｍｎ，Ｆ，Ｃａ，Ｍｇ，Ｓｒ等元素高于平均值；Ｐｂ，Ｚｎ，Ｈｇ，Ｃｏ，Ｖ，Ｓｅ，Ｒｂ，Ｂｅ，Ｓｎ，Ｍｏ，Ｂｒ等元素低于全国均值（ｔ检验结果达到显著水平）；其余元素与全国均值相比均无显著差异。山西土壤元素背景值的分布特征是由南向北、田东南向西北逐渐降低，其主要影响因素是土壤类型、土壤母质和土壤粒度。

The authors laid out 225 soil profile samples from different areas around Shanxi,thentreated bv modern analytic method and mathematical statistics,and at last,the 61 soil. ele-ment background values are obtained. Comparing the soil element background values in Shanxi with those in the world thatMg in Shanxi is higher than the range in the world,In is lower than the range in the world,and the other element background values are in the worlds range.The average values of Cu,Cd,Ni,Mn,F,Ca,Mg,Sr in Shanxi are higher than thosein China;Pb,Zn,Hg,Cr,V, Se,Rb,Be,Sn,Mo,Br in Shanxi are lower than thosein China(They reached the marked level by t-test);the other elements haven、marked differ-ence.The distribution feature of the soil element background values in Shanxi is dropping gradually from south to north and from southeast to northwest.The main effecting factors ofbackground values are soil type,mother material and soil granularity.