Analysis on regional difference between input and output of ecological agriculture:Based on the data of 31 counties（districts）in 7 cities in Jiangsu Province

The analysis of the regional difference of ecological agriculture input and output has guiding value for promoting the investment of ecological agriculture optimization and upgrading.In this paper,the three-stage method is used to measure the regional differences of three kinds of inputs to eco agriculture output.According to the research needs,CCR,BCC and SBM are selected to explore the application of DEA method in eco agriculture input-output analysis from the three dimensions of technical efficiency,returns to scale and factor utilization,Based on the data collected from 31 counties（districts）of 7 prefecture level cities in Jiangsu Province in 2021,the regional gap of eco agriculture development of 7 prefecture level cities in different geographical locations is calculated.The results show that the distribution of ecological agriculture PTEin Jiangsu Province is relatively concentrated.The mean value of 31 counties（districts）is 0.636,which is higher than the mean value of TEand SE.In addition,the SEvariance is 0.047,which is higher than the TEvariance,which is lower than the FET variance.Therefore,it can be seen that the technical validity of ecological agriculture in Jiangsu Province is significantly different.Accordingly,the development of ecological agriculture can be divided into three categories,such as polarization,dominance and backward development.From the perspective of returns to scale,27 of the 31counties（districts）selected in the study have increased returns to scale,indicating that the overall posture of ecological agriculture in Jiangsu Province is good.From the perspective of factor utilization rate,the average value of the employment utilization rate（UFW）of ecological agriculture in 31 counties（districts）selected in the study is 66.03%,the average value of land resource utilization rate（UAA）is 54.28%,and the average value of modern agricultural machinery utilization rate（UTP）is 39.02%.Compared with the ecological agriculture in Europe and America,the factor utilization rate of Jiangsu Province is not high,so the local government needs to formulate corresponding incentive policies to improve the factor utilization rate.