呼伦贝尔草原沙漠化现状、发展态势与成因分析

呼伦贝尔草原是我国优质的天然牧场和重要的畜牧业生产基地。近年来,该草原中的砂质草场已大面积发生沙漠化。通过实地调查研究,并结合遥感资料和前人研究成果,本文在分析了呼伦贝尔草原沙漠化现状和发展态势的基础上,着重从地质环境变化和人类活动两个方面探讨了该区沙漠化的成因。认为沙漠化的发展是自然因素与人为因素共同作用的结果,地质环境因素是形成沙漠化的基础,地表的土壤和植被是草原良好的保护层,人类对草原的破坏是导致沙漠化的直接原因。最后,对沙漠化的防治提出了3点建议。

Present Situation, Evolution Trend and Causes of Sandy Desertification in Hulunbuir Steppe

Hulunbuir Steppe is one of the high quality natural pastures and important livestock husbandry bases in China. But in recent years, sandy desertification occurs in the large areas of sandy grasslands in Hulunbuir Steppe. According to the achievements of on-the-spot investigation, remote sensing and previous researches, the present situation and evolution trend of sandy desertification have been discussed in this paper. The cause of sandy desertification is also approached through analyses on geological environment changes and human activities. Finally, it is considered in this paper that sandy desertification of Hulunbuir Steppe results from the outcome of natural changes and human activities; and geological environment is the basis of sandy desertification development; while the surface soil and vegetation are sound protective umbrella of steppe; however the direct cause of sandy desertification is human s great damage to steppe. Finally, authors offer three proposals for sandy desertification control.