The distribution and area data of degraded,sandy and salinized grassland in Horqin grassland of Tongliao were obtained by means of data collection,ground survey and remote sensing information extraction.Based on investigation and interview,the degree of grassland degradation,sandy and salinized in Tongliao city was analyzed.Among the three types of degradation of natural grassland in Tongliao city,the area of degraded grassland accounted for 47.65%,sandy grassland accounted for 27.37%,and salinized grassland accounted for 5.29%.In the degree of"three degradation",the area of mild"three degradation"grassland accounted for 33.39%of the city's grassland area,the area of moderate"three degradation"accounted for 23.5%,and the area of severe"three degradation"accounted for 23.42%.From the point of view of the change degree of the"three degradation"grassland in the 1980s,2000 and 2018,the"Three Degeneration"area of the city showed a trend of first increasing and then decreasing.Understanding the degradation,desertification and salin-ization of Horqin grassland in Tongliao city can provide a basis for comprehensive protection and comprehensive restoration of Horqin grassland.
NETL
NSTL
万方数据
