我国北部草原系列土壤中成土作用对微量元素含量影响的经向分异  

REGIONAL VARIATIONS IN INFLUENCE STRENGTH OF SOIL FORMATION PROCES ON TRACE ELEMENT CONTENTS IN SOILS FROM NORTHERN CHINA

作　　者：陶澎 林春野[1] 冯泉[1] 

机构地区：[1]北京大学城市与环境学系

出　　处：《土壤学报》1995年第2期126-131,共6页Acta Pedologica Sinica

摘　　要：根据我国大部草原系列土壤中１０种微量元素的实测结果，用方差分析和多重比较方法研究了母质和土类因素对该地区土壤微量元素含量的影响。并以主成份得分的调整独立方差为依据，探讨了成土作用对土壤微量元素含量影响的方向、强度及地域分异特征。研究结果证实，不同母质和土类单元草原土壤中微量元素含量有明显差异，其中母质单元间的差别尤为显著．影响草原土壤表层微量元素含量的主要成土因素包括两种类型：导致元素含量下降的淋溶作用和造成元素相对富集的粘化、生物小循环与腐殖化作用。两类过程作用方向相反，而强度的经向变异一致。其共同作用的结果是使草原土壤中微量元素的淋失趋势从东向西先上升而后下降。其中铜、镍、铬等大多数元素以淋失为主要特征。对锰、锌等元素，第二类作用的影响较为明显。The contents of ten trace elements in soils from northern China were determi-ned.The effects of parent material and soil types on the element abundances wereinvestigated statistically by the methods of ANOVA and multiple classification. Theadjusted independent variances, calculated based on the factor score,were computedto describe the influence of soil formation processes on the contents and distributionof the trace elements in the soils. The significant differences in element abundances among various types of soiland among soils derived from various types of parent materials,especially the latter,were observed.The soil formation processes related to element content might be ca-tegorized as a)the leaching process,and b)formation of clay,biological absorption,and humification,The influence directions of the two kinds of processes are diffe-rent, but the strengths of them all decreased from east to west at the same time.The leaching tendencies of trace elements from east to west,therefore,decreased firstand then increased,due to the co-effects of the two kinds of the processes.Themajority of elements including copper,nickel and chromium was characterized byleaching during the formation of soil,while significant influences of the secondkinds of processes were noticed for manganese and zinc.

关 键 词：草原土壤 微量元素 成土作用 方差分析 多重分类 

分 类 号：S812.2[农业科学—草业科学]