extremely significantp > 0.05
A p -value of 0.01 < p < 0.05 was considered significant, p < 0.01 was extremely significant, and p > 0.05 was considered insignificant.
A p -value of 0.01 < p < 0.05 was considered significant, p < 0.01 was extremely significant, and p > 0.05 was considered insignificant.
During the period from 2000 to 2020, the NDVI trends showed an overall trend of improvement, and a vegetation coverage rate of 94% of the study area also showed a trend of improvement with an annual growth rate of about 4.7%/yr.
The overall value of NDVI showed a decreasing trend from northwest to southeast.
The transition from the main grassland in the study area to bare land or construction land shows an obvious trend of NDVI degradation.