内蒙古地区A、C层土壤中金属元素含量比值的影响因素及其空间结构分析  

Spatial Structure Analysis of the Ratios of Trace Metal Contents in Horizons A And C of inner-Mongolian Soils

作　　者：徐尚平[1] 陶澍[1] 曹军[1] 徐福留[1] 李本纲[1] 

机构地区：[1]北京大学城市与环境学系,北京100871

出　　处：《土壤通报》2001年第5期230-234,共5页Chinese Journal of Soil Science

基　　金：国家杰出青年基金(49525102)资助

摘　　要：本研究对内蒙古地区３４９个样点Ａ、Ｃ层土壤中１０种金属元素含量的比值进行了分析．总体而言，金属元素在内蒙古地区表层土壤中有富集的趋势，但它们在Ａ、Ｃ层土壤中含量的比值具有较大方差；偏相关分析的结果表明，土壤有机质含量、ｐＨ值和粘粒含量没有对上述比值产生显著的影响；同时，通过半方差函数的计算和空间插值对上述比值的空间结构特征进行了讨论．结果显示，研究元素在内蒙古土壤中的纵向分布没有表现出明显的空间结构，多数元素在Ａ、Ｃ层土壤中含量比值的半方差函数表现为纯块金效应．因此，内蒙古地区金属元素沿土壤剖面分布特征主要影响因素的空间变异尺度可能在本研究的最小采样尺度（大约２０ｋｍ）以下．The analysis of ratios of trace metals in horizons A and C of soils in Inner Mongolia shows that the contents of trace elements in horizon A were higher than those in horizon C, although the standard deviation of the ratio for all elements were fairly large. In spite of good spatial structures of soil physiochemical characteristics at large scale, the effect of which was not significant based on the partial correlation matrix among soil organic matter contents, pH values, clay contents as well as the ratios of trace elements in horizon A and C. Pure nugget was a good representation for the semivariograms of the ratios of most trace elements, except for zinc, mercury, nickel and manganese. Therefore, small-scale factors such as topography and land-use may be attributed to this phenomenon and further investigation is needed.

关 键 词：土壤 金属元素 含量比值 影响因素 空间结构 

分 类 号：S153.61[农业科学—土壤学]