Abstract:

To study the multi-year change of the ecological quality of vegetation in Fenghua, the MODIS vegetation index and the meteorological observations from 2000 to 2018 were selected to calculate and analyze vegetation coverage, vegetation net primary productivity and ecological quality index of vegetation. The results showed that: (1) from 2000 to 2018, all the three indicators in Fenghua presented a trend of improving, with the average growth rate of 0.26%/a、1.7 g C/(m²·a) and 0.19/a, respectively, exceeding the 0.01 significance level except the net primary productivity of vegetation; (2) in 2018, the ecological quality of vegetation in Fenghua reached the highest level, but there were big differences among different regions, the vegetation coverage and vegetation net primary productivity in mountainous areas were significantly better than those in urban areas, the ecological quality of vegetation in Dayan, Xikou and Shangtian ranked as the top three; (3) the change of the vegetation ecological quality index was less affected by the annual precipitation after 2014, it might be related to the enhanced ecological protection and restoration; compared with 2005 when the “Two Mountains Theory” was first proposed, 90.0% of the regions achieved a positive increase in ecological quality index of vegetation in 2018, especially in mountainous areas. This study found that the ecological quality of vegetation in Fenghua has been improved since 2000, however, the spatial differences in eco-environmental quality are significant, the ecological quality of vegetation in some plain areas are getting worse, which needs enhanced protection.

Key words: Vegetation Coverage, Vegetation Net Primary Productivity, Ecological Quality Index of Vegetation, Meteorology, Fenghua, Ecological Civilization