内蒙古河套灌区水利工程对土壤盐渍化的影响

The Impact of Irrigation Works on Land Salinification in Mongolia Hetao Regions

分析了内蒙古自治区河套灌区水利工程对农田生态系统的影响,河套灌区土壤耕作层处于脱盐状态,盐碱地面积呈减少趋势,表明该灌区农田生态系统功能不断增强,但由于灌区内曾长期处于积盐状态,故仍然存在潜在的次生盐渍化威胁。

On the basis of an analysis of the impact of irrigation works on farmland ecosystem in Hetao Irrigation Area,it is found that the cultivation layer of farmland is desalinating and the area of saline land is decreasing.It is thus indicated that the function of farmland ecosystem in Hetao Irrigation Area is enhancing.However,the irrigation area is at the salification status,and there are still threats of secondary salinification.