甘肃河西走廊草地沙质荒漠化监测与治理对策

Monitoring of the Grassland Desertification in Hexi Corridor in Gansu Province and Its Controlling Strategies

对河西走廊地区草地沙质荒漠化的遥感监测结果表明,全区5市91563.47km2草地面积中,强烈发展沙化草地占29.22%,发展沙化草地占1.5%,潜在沙化草地占30.34%,未沙化草地占38.94%。全区沙质荒漠化草地占草地面积的61.06%,50%以上的草地处于沙质荒漠化状态,其中金昌市与嘉峪关市强烈发展的沙质荒漠化草地面积比例最高,超过60%以上。调查分析认为,该区草地沙质荒漠化成因主要是气候干旱、多风以及土壤质地疏松等自然因素和长期滥垦、过度放牧和水资源利用不当等历史和人为社会因素相互作用的结果,在此基础上提出了治理河西走廊地区草地沙质荒漠化的对策。

The results of the monitoring of the grassland desertification in Hexi Corridor show that the proportion of severely developing sandy grassland is 29.22%,developing sandy grassland is 1.5%, potentially sandy grassland is 30.34%,nonsandy grassland is 38.94%.The total proportion of sandy grassland is( 61.06%) in Hexi Corridor area; the area of severely developing sandy grassland is more than 60% in Jinchang and Jiayuguan cities. After analyzing the present situation of the grassland desertification in Hexi Corridor in Gansu Province, drought, wind, looseness of soil surface, long-term unduly reclamation, over- grazing and unreasonable utilization of water resources are believed to be the main causes of grassland desertification in Hexi Corridor. Some strategies to combat grassland desertification are proposed in this paper.