ANALYSIS ON THE CAUSES AND COUNTERMEASURES OF GRASSLAND DESERTIFICATION IN QILIAN MOUNTAIN AREA

Taking Sunan County in Qilian mountain area as an example mountain-grassland desertification,the paper analyzes the eauses the present state and the imperilment of in Qilian mountain area,and combining its history,from the perspective of nature and humans probes into reasons of grassland desertification.The natural factors are the basis of forming grassland desertification,and human factors are its dominance. So the paper puts forward a series of control for grassland desertification and reconstruction countermeasures for ecological environment mainly in human factors.These measures include increasing capital input and introducing and popularizing some new techniques, reducing grassland pressure on population and livestock,and realizing reasonable use of water to improve grassland quantity and quality.Implementing these measures can inhibit more development of grassland desertification,and result in the healthy development of regional environment.