Abstract:
Based on satellite remote sensing and ground meteorological observation data from 2000 to 2023, the interannual and variation characteristics of vegetation ecological variables such as
NDVI and
NPP were analyzed by trend analysis and anomaly analysis and other mathematical statistical methods, and the evolution characteristics of vegetation ecological quality in Jiangxi Province were analyzed from space. The results show that:(1) Since 2000, vegetation ecological variables such as
NDVI and
NPP in Jiangxi Province have shown a significant upward trend, with increasing rates of 0.004/a and 2.6 g C/(m
2·a).(2) The vegetation ecological quality in Jiangxi Province shows a clear seasonal variation characteristic of high in summer and low in winter, generally with the lowest vegetation ecological quality in January or February and the highest in July or August.(3) The overall ecological quality of vegetation in Jiangxi Province has improved significantly, but there are obvious spatial differences.The regions with good vegetation ecology are mainly located in the high altitude mountains at the border of the province, and the low value areas are located near the rivers and lakes and urban areas with water bodies and towns as the underlying surface. The regions with the most obvious vegetation ecological improvement are located in the Poyang Lake wetland, part of the hilly areas in the transition zone between the central and southern mountains and plains. Fuzhou, Yingtan and Ganzhou are the top three cities in terms of vegetation ecological improvement.