内蒙古草原新增沙尘源

2006年夏季,经对全区各生态类型区实地调研：干旱程度普遍高,湖泊集水线急剧向心退缩或湖泊干涸,湖泊萎缩、河流湿地退化特征明显;进入6、7月中旬,大范围、大面积草原土地处于裸露状态,沙源丰富,草原返青尚无从谈起;荒漠草原上迅猛发展的露天矿开发,裸露外排土场成为新的人为沙尘源。本文定性报告了内蒙古草原新增沙尘源现状。

THE NEWLY ADDED SAND-SOURCES OF INNER MONGOLIA GRASSLAND

In the summer of 2006,based on a field research of ecological type zones of the entire autonomous region,it comes to a result that： generally high degree of drought,the catchment line is back sharply to the central or drying up of the lake,and the shrinking of lakes and the characteristic of the deterioration of river wetland is obvious.Coming into the middle of June and July,because wide-range and large-area soil of grassland is bareness,and there are abound sources of sand,there will be no possibility of grassland return to green.The explosion of strip-mine＇s development on the desert grassland,so that the naked excreting land become the new man-made source of sand.This paper qualitatively reported the present condition of additional sources of sand and dust in Inner Mongolian grassland.