安徽江淮地区土壤微量元素分布特征及成因分析

多目标区域地球化学调查作为生态地球化学调查的基础工作,以快速查明表层土壤及其背景地球化学元素分布为目的.本文以安徽江淮地区多目标区域地球化学调查结果为基础,对安徽江淮地区耕地土壤及其母质中主要元素分布特征及其成因进行了分析研究,结果得出:(1)大多数地区表层土壤微量元素含量与深层具有一致性和继承性;(2)各地土壤微量元素分布特征主要受成土母质类型控制,说明其成因与成土母质和成土过程等因素有关;(3)耕地土壤微量元素含量的变异受施肥、灌溉和耕作方式等人为因素影响较大,且存在较大的地区差异性.

Features of distribution of trace elements in soils in the Jianghuai area,Anhui and analysis of the cause of formation

Multi-target regional geochemical survey as a fundamental work of eco-geochemical survey aims at rapid discovery of distributions of topsoil and background geochemical elements.Based on the results of multi-target regional geochemical survey in the Jianghuai area,Anhui,this paper analyzed features of distribution of major elements in cultivated land soils and their parent materials in the Jianghuai area,Anhui and analyzed the cause of formation,and concluded that: 1) there exist the consistency and inheritance in the contents of trace elements between top soils and deep soils in most areas;2) features of distribution of trace elements in soils of each area are mainly controlled by the parent material types,indicating their affinity with soil parent materials and soil-forming process;3)variations in contents of trace elements in plowland soils are mainly caused by human factors such as fertilizer applications,irrigation and farming pattern and they show great differences in different areas.