【摘要】 <正> 土壤地球化学是研究成土风化壳和土壤的化学组成、元素迁移、分异及形成的过程。通过对表层岩石、土壤、天然水、有机体中元素的富集和分散的自然规律的分析,能更深刻地揭露植被、土壤及潜水元素之间的内在联系,对了解古地理土壤形成环境,土壤肥力发展方向,确立环境本底值有十分重要的意义。本文主要阐述乌兰布和沙漠土壤地球化学的特征及类型,为制定分区利用规划提供科学依据。更多还原

【Abstract】 The geochemical characteristics of the soils in the Ulanbuh Desert and their types were studied. The results show that the migration of SiO2, Al2O3, Fe2O3, Mn and Ni in the surface layer of soil is evident. The Processes of Aluminosilifi-cation, ferruginization, calcification and salt accumulation are described. It is suggested that attention should be paid to soil amelioration for releasing crop from the harm caused by soluble salts and to nitrogen and phosphorus replenishment when the land is cultivated.更多还原