锡林郭勒盟南五旗(县)土地沙漠化研究

Study on the Land Desertification in Five Banners(Counties) of South Xilingol League

在野外调查和前人研究的基础上,通过遥感技术对该地区沙漠化的现状、发展趋势和成因进行了研究。结果表明,研究区的沙漠化土地已达15 424.46 km2,占监测区总面积的53.26%,近30年来沙漠化从南向北持续发展,且在各个旗县出现不同的发展趋势。沙漠化的这一发展趋势既与研究区持续的干旱化趋势有关,更是超载过牧和农业界限的持续北移错位的结果。

Based on field investigation and the previous researches, the status, development trend and formation causes of desertification in the area were studied by using remote sensing technology. The results indicated that the desertification land in the study area had reached 15 424.46 km^2, which occupied 53.26% of the total area of the monitoring region. During recent 30 years, the desertification continuously developed from south to north and showed different development trend ,in different banners （counties）. The development trend of desertification was not only related with the sustainable drought trend in the study area, but it was also the results of overgrazing and the sustainable northward moving of the agricultural limits.