STUDY ON THE SPATIOTEMPORAL VARIATION CHARACTERISTICS AND IN-FLUENCING FACTORS OF FARMLAND ECOSYSTEM SERVICE VALUE IN WESTERN CHINA
The production value,ecological value,and social function contained in farmland ecosystems play an important role in the development of human society.To analyze its spatiotemporal variation patterns and potential influencing factors is of great significance for promoting the improvement of agricultural production quality,efficiency,and green development.Based on statistical data from Western China from 2002 to 2022,environmental economics methods were used to calculate 12 positive service values and 4 negative service values.Multiple regression models were used to analyze the influencing factors of spatial differences in the total service value of farmland ecosystems in various provinces.The results showed that:(1)From 2002 to 2022,the total service value of farmland ecosystems in Western China continued to increase,from 1 106.71 billion yuan to 3 453.21 billion yuan.(2)Supply services,especially agricultural product production value,accounted for 50.3%to 67.2%of the positive service value.This indicated that the most basic function of the farmland ecosystem was to provide agricultural products,as well as could be reflected in market value,while people's willingness to pay for other service functions was relatively low.(3)The value of gas regulation and waste disposal in regulation and support services was relatively high,accounting for 9.0%to 9.6%and 7.2%to 13.1%,respectively.The negative service value had also been increasing year by year,but the growth rate was lower than the positive service value,indicating that the emphasis and protection of the ecological environment had been increased in the agricultural production process.(4)From 2002 to 2022,Sichuan and Guangxi,due to their high agricultural output,ranked among the top in Western China in terms of the total service value of farmland ecosystem,accounting for nearly one-third.Xizang,Qinghai,Ningxia,Chongqing,and Gansu ranked at the bottom of Western China,especially Xizang and Qinghai,with an average annual growth rate of less than 1 billion yuan.This was related to the agricultural industry structure dominated by animal husbandry.(4)The input of the agricultural population and the level of technological development were the main factors affecting the total service value of the farmland ecosystem.The elasticity coefficients of rural employment and energy consumption per 10 000 yuan of GDP were 1.1 and 0.504,respectively.In summary,Western China has a vast territory with diverse terrain,landforms,and climate types,and is also an ecologically fragile area.In the future,it should be tailored to local conditions,through scientific planting and efficient management,to improve the quality and efficiency of agricultural production,and enhance the benefits of farmland ecosystems to humanity.
Western Chinafarmland ecosystemservice functionspatiotemporal variationinfluencing factor
NETL
NSTL
万方数据
