毛乌素沙地是一个农、林、牧交错出现的生态脆弱区。沙区人民为维持脆弱的生态平衡进行着坚持不懈地努力 ,并取得可喜的成绩。但随经济的发展 ,对沙区的压力也在增加 ,既有自然因素 ,又有社会因素 ,更有人为因素。沙区局部地区流沙在扩大 ,耕地在扩大 ,这种现象应引起各方的重视。 Mu Us sandland is an ecologically fragile area where farmers, forestry and animal husbandry staggered. People in the sand areas have worked tirelessly to maintain the fragile ecological balance and have made gratifying achievements. However, with the economic development, the pressure on the sand area is also increasing. There are both natural and social factors and more man-made factors. The quicksand in some parts of the sand area is expanding and the cultivated land is expanding. This phenomenon should be given due attention by all parties.