The spatiotemporal evolution and driving factors of farmland system health:Taking the middle and lower reaches of the Yangtze River as an example
The health of farmland system is closely related to the goal of"quantity-quality-ecolo-gy"in farmland protection,which is of great significance for ensuring sustainable development of the social economy.Therefore,this article takes the middle and lower reaches of the Yangtze Riv-er,a major grain producing region,as an example.The farmland system health evaluation model based on system theory and ecosystem health theory is constructed.The spatiotemporal evolution of farmland system health in the study area from 2000 to 2020 is quantified using methods such as Sen-MK trend analysis,landscape pattern index,multi-scale geographic weighted regression,and GIS spatial analysis.Then,this research revealed the impact of multiple factors such as natu-ral and socio-economic factors on the health of the farmland system.The research results indicate that:(1)From a temporal perspective,the overall health of the farmland system in the middle and lower reaches of the Yangtze River from 2000 to 2020 showed a slight downward trend,which is related to the deterioration of the organizational structure stability and resilience of the farmland system.From a spatial perspective,the health status of the farmland system in the Northern An-hui,Northern Jiangsu,and eastern coastal areas continues to improve.The farmland in the Yang-tze River Delta,Hunan,and Southern Jiangxi shows a trend of turning from poor to good,but the Jianghan Plain shows a clear deterioration trend.(2)The impact of natural environmental changes and human activities on the health of the farmland system exhibits significant spatial heterogene-ity.Among them,changes in surface temperature,sunshine hours,relative humidity,and annual precipitation have a negative impact on the health of the entire farmland system in the region,while changes in annual GDP and spatial density of farmland have a positive impact on the health of the farmland system.The farmland system health assessment model constructed by this re-search can provide reference for constructing a"quantity-quality-ecology"performance evalua-tion of farmland protection.It is of great significance for improving the theoretical research of farmland system assessment and promoting regional farmland health management.
farmland system healthfarmland protectionmulti scale geographic weighted re-gressionthe middle and lower reaches of the Yangtze River Region
NETL
NSTL
万方数据
