降低土壤中氟含量的生态地质学方法探讨

从生态地质学角度提出一种新型的降低土壤氟的方法,利用植物的根系分层特性研究植物对土壤氟进行吸收的功能,通过对研究区植被的根群特征进行调查分析,可以构建根群坝、农林复合系统等,人为地把氟在土壤包气带中由源到汇的运动过程进行层层拦截、吸收,实现对土壤氟经淋滤进入地下水的迁移过程分层、分阶段拦截的效果,从而达到降低土壤及农作物氟含量水平的目的。并根据南阳盆地不同的地貌提出了具体生态降氟的建设措施。

Discussion on How to Reduce the Fluorine Contents in Soil with the Ecogeological Method

From the view of ecogeology,we put forward a new method to reduce the fluorine contents in soil.Using plant root delamination to study the functions of plants to absorb fluorine in soil.Analyzing the root characteristics of plants in the study area,we can build root group dams,agriculture-forestry composite system and so on,so as to artificially intercept and absorb fluorine when it moves from the source area to the drainage area in the unsaturated zone of soil,to achieve the effect of intercepting soil fluorine in different layers and stages when it enters into the groundwater,thus achieving the goal to reduce the fluorine level in soil and crops.And according to different landscapes of the Nanyang Basin,we put forward concrete measures to reduce fluorine contents with the ecogeological method.