长春经济区土壤地球化学特征

长春经济区可划分为低山丘陵和山前台地平原两个地貌区.自然景观环境要素由东向西呈有规律的渐变，土壤亦由暗棕壤、白浆土—黑土—黑钙土过渡.通过对大量的土壤地球化学资料的分析研究，结果表明：区域景观环境要素控制区域土壤地球化学作用及土壤元素分布，地质构造单元制约成土母质元素分布；元素分布在很大程度上继承母质元素的地球化学特征，不同景观环境中元素分布亦有一定的差异；而且人类生产活动对土壤元素的分布以及土壤性状土壤肥力影响巨大，对此应给予关注.

GEOCHEMICAL CHARACTERISTICS OF THE SOIL IN CHANGCHUN ECONOMIC ZONE,JILIN PROVINCE

The Changchun Economic Zone can be divided into two landform areas:low hills and piedmont terrace plain. The natural landscape environmental elements show a regular gradual change from east to west, with the soil also changing from dark brown soil, albic soil, black soil to chernozem in turn. The results of analysis of a large number of soil geochemical data show that the regional landscape environment controls the regional soil geochemistry and soil element distribution, while the geotectonic units restrict the distribution of elements in soil parent. The element distribution largely inherits the geochemical characteristics of parent elements, with certain variances in different landscape environments. Moreover, human activities have great influence on soil element distribution, soil properties and fertility, which needs much attention.