In order to understand the change of vegetation fraction in agro-pastoral transition area,Yanchi county,Ningxia was taken as an example.

• 为了解农牧交错区植被覆盖度变化,以宁夏盐池县为例,基于NDVI和植被覆盖度遥感定量模型,提取了植被覆盖等级图。