湖南省农用土地的环境地质问题

湖南省农用土地的环境地质问题主要有两种类型，一种是受成土母岩的物理性状和化学组分的影响而产生的原生环境地质问题，另一种是受人类工程一经济活动及外动力作用影响而形成的次生环境地质问题，本文就其形成机制作了探讨，并结合农业产提出了可操作的防治措施。

THE ENVIRONMENTAL GEOLOGY PROBLEMS IN THE PROCESSION OF AGRICULTURAL LAND UTILIZATION IN HUNAN

There are two original type problems of environmental geology in the procession of agricultural land utilization in Hunan: The first type is the primary enviromental geology problems affected by the physical properties and the chemical compositions of original rocks, such as sticky and learn soil, calcareous soil hardening and sand leaching. The second hoe is the secondary environmental geology problems affected by the pressure of hunan engieering and economic activities and exogenic process. It contains water and soil pollution, soil and water loss, soil colden by underground water and sand-forming of soil. The original machinisms about the mention preblems are discussed respectively, and the operatable controlling measures are proposal after analyzing the agricultral practice.