Research On The Evolution Of The Spatiotemporal Pattern Of Agricultural Ecological Efficiency In The Three Gorges Reservoir Area And Its Influencing Factors Under The Background Of Farmland Suitable For Mechanization Transformation

Agriculture is the basic industry for the survival and development of society.A good agricultural ecology is the prerequisite for maintaining economic development and social stability.Improving the efficiency of agricultural ecology is an inevitable requirement for the strategy of rural revitalization.The Three Gorges Reservoir area is a typical hilly and mountainous area with poor farmland resource endowment structure,which is not suitable for large-scale agricultural machinery operations,and it is difficult to play the role and benefits of agricultural machinery.In recent years,the farmland reconstruction project in the Three Gorges Reservoir area to improve the efficiency of large-scale machinery operation has achieved remarkable results.Therefore,it is of great significance to study the impact of farmland suitable for mechanization on the agricultural ecological efficiency of the Three Gorges Reservoir area.The specific research work of this article is as follows:(1)Investigate the transformation of farmland into mechanization in various districts and counties of Chongqing City in the Three Gorges Reservoir area from 2010 to 2018,and carry out the construction of agricultural production factor indicators around the background of the transformation of farmland into mechanization,and complete data collection and sorting.(2)The super-efficiency DEA model was used to calculate the agro-ecological efficiency values of the districts and counties of Chongqing in the Three Gorges Reservoir area from 2010 to 2018.The study found that the average agro-ecological efficiency of the districts and counties of Chongqing in the Three Gorges Reservoir area showed an upward shift.The overall value is between 0.77-0.875,and the average level of agricultural ecological efficiency in each year belongs to the intermediate level.The agricultural ecological efficiency value of Jiulongpo District,Nan'an District and Yubei District is greater than or equal to 1.(3)Using the center of gravity model to analyze the spatiotemporal evolution trajectory of the agricultural eco-efficiency in the districts and counties of Chongqing in the Three Gorges Reservoir area from 2010 to 2018.The center of gravity of agricultural ecological efficiency in the Three Gorges Reservoir area was obtained,and it was found that the deviation of the center of agricultural ecological efficiency was spiral and moved to the southwest.(4)Use Moran'I index model to analyze the global autocorrelation and local autocorrelation of the agricultural eco-efficiency of the districts and counties of Chongqing in the Three Gorges Reservoir area.The study found that the value of the global autocorrelation Moran'I index showed a wave-like change.The value of the entire index was between-0.138-0.147,and the value eventually moved to a positive direction,showing a clustering effect.Select representative years of 2012,2015,and 2018 for partial autocorrelation calculations,and classify districts and counties based on four types of autocorrelation relationships.(5)Based on the Tobit regression model,construct the index of agricultural ecological efficiency influencing factors,and analyze the influence of each influencing factor on agricultural ecological efficiency.The study found that the transformation of farmland suitable for mechanization,the level of financial support for agriculture,agricultural production capacity,the level of agricultural scale,the degree of agricultural marketization,and the density of agricultural machinery have a positive correlation with the impact of agricultural ecological efficiency.The impact of urbanization level,agricultural disaster rate and industrialization level on agricultural ecological efficiency is negatively correlated.