【摘要】 土地沙漠化是当前世界上一个重要的环境问题。由于它造成生物生产量的下降和可利用土地资源的丧失,已引起世界上关注。我国沙漠化土地发展十分迅速,从70年代中期的17.6万km~2发展到80年代中期的20.1万km~2,年平均增加约2100km~2,使我国北方大部分地区成为沙漠化环境,对国民经济的发展极为不利。因此,抓紧沙漠化的防治已是刻不容缓的事,必须制定对策,予以科学的、全面的、综合的防治,才能有效地控制沙漠化的发展。本文就沙漠化的防治提出了一个适合我国国情的基本对策。更多还原

【Abstract】 In Northern China distribute widely desert and desertified lands. At present, about 3. 93 million ha of farm lands, 4. 93 million ha of steppe, 2000km of railways and 50 million people are suffering from the threat of desertification. In the marginal areas of dry-farm land and steppe, the economic losses are about 0.45 billion yuan per year because desertification decreases vegetation produce and soil fer-tillization. In the recent ten years, the desertification tendency has been improved in local areas, but developed in general areas. Particularly, the areas of desertification have added up to 2100km2 per year, so that the amount of farm land and steppe are turned into desertified land. Therefore, the paper draws attention to the problems of desertification and its prevention and cure,to link the environment protect, ternitory control and sand regions enconmy develop with together. It is of a direct and practical significance to prevent and cure desertification and improve the desertified environment.更多还原