论文部分内容阅读
清代,人类开发干预与转为干冷及温干的气候相共轭。清末为维护统治,实行的“放垦蒙地”、“移民实边”政策,是破坏鄂尔多斯生态脆弱地区的植被、诱使毛乌素沙地东南缘土地沙化的主要社会趋动因素。然清末放垦并不是造成鄂尔多斯草原沙化的主要原因,而是在自然因素和人为因素长期综合作用下,生态脆弱的覆沙地区人类过度利用,或不合理的经济活动诱发引起。第三、四纪以来,青藏高原隆升造成该地区生态脆弱性,是易于发生土地沙化的根本原因。
During the Qing dynasty, human development interventions were conjugated to dry and warm climate. In the late Qing dynasty, the policy of “letting go of reclamation” and “immigrants solidify” in order to maintain dominance were the main social factors that undermined the vegetation in the ecologically fragile area of Erdos and induced desertification in the southeastern margin of the Mu Us Desert. However, in the late Qing Dynasty, the land reclamation was not the main reason for the desertification of Erdos grassland. However, under the long-term comprehensive effect of natural and man-made factors, overuse of mankind in frangible sand-covered areas or induced by unreasonable economic activities. Since the third and fourth years, the ecological vulnerability of the region caused by the uplift of the Qinghai-Tibet Plateau is the root cause of land desertification.