THE SPATIOTEMPORAL EVOLUTION CHARACTERISTICS AND DRIVING MECHANISM OF FARMLAND ECOSYSTEM IN JIANGSU PROVINCE
Farmland contains enormous service value and forms the foundation for human survival and development.Exploring its spatiotemporal evolution characteristics and driving mechanisms is very crucial for achieving green and efficient agricultural development.Based on the statistical yearbook data of Jiangsu province from 1990 to 2021 and relevant city yearbooks,a price correction index was introduced,and the ecological economics method was used to quantitatively calculate the value of 12 farmland ecosystem services.At the same time,the STIRPAT model was adopted to analyze the social driving factors for the spatial differences in the total service value of farmland ecosystem in different cities.The results were listed as follows.(1) From 1990 to 2021,the total service value of farmland ecosystem in Jiangsu province showed a continuous growth trend,increasing from 56.452 billion yuan to 193.455 billion yuan.The trend of positive service value was consistent with the total service value,with supply and regulation services being the most important service functions,contributing a total of 84.63％ to 85.53％.The negative service value also showed a gradual upward trend,increasing from 3.075 billion yuan to 12.356 billion yuan,but the growth rate gradually decreased.(2) From a spatial perspective,the total service value of farmland ecosystem in various cities of Jiangsu province in 2021 ranged from 3.396 to 36.284 billion yuan,with Northern Jiangsu>Central Jiangsu>Southern Jiangsu.In terms of the total service value of farmland ecosystem per unit area,cities fluctuated from 24114.32 to 52841.91 yuan/hectare,with a significant difference.Among them,Taizhou and Yangzhou in the Central Jiangsu region ranked among the top three in the province,while Zhenjiang in the Southern Jiangsu region ranked the sixth in the province.(3) In terms of the influencing factors of the total service value of farmland ecosystem,the number of rural employees was positively correlated with it,while urbanization rate was negatively correlated with it.Therefore,the development of the Southern Jiangsu region put significant pressure on its farmland ecosystem.It is necessary to adjust the industrial structure reasonably,adopt scientific planting techniques and efficient management methods,and continuously improve the various service values of the farmland ecosystem.
NETL
NSTL
万方数据
