长江经济带农业生态效率评价及其影响因素研究

农业生态文明建设依托于生态效率的改善，基于2008—2018年长江经济带11个省市面板数据，采用超效率SBM-Undesirable模型、全局Moran‘s I 指数分析长江经济带农业生态效率时空演变特征，并通过面板回归实证分析长江经济带农业生态效率影响因素。研究表明：1）研究期内长江经济带农业生态效率均值小于1，未达到有效值，上、中、下游农业生态效率均值分别为0.9329、0.7830和0.9624，呈现出下游＞上游＞中游的趋势，各省市间存在显著差异；2）长江经济带农业生态效率的全局Moran‘s I 指数呈弱集聚态势，趋势上呈现阶段性变化，表现为：正集聚效应→负集聚效应→正集聚效应；3）经济发展水平与农业生态效率之间呈正“U”型关系，农业种植业结构、研发投入、农业集约化和财政支农水平促进农业生态效率的提升，城镇化抑制农业生态效率的提升。

AGRICULTURAL ECOLOGICAL EFFICIENCY AND ITS FACTORS OF YANGTZE RIVER ECONOMIC ZONE

Construction of agricultural ecological civilization depends upon improvement of ecological efficiency. This paper, based on 2008-2018 panel data of 11 provinces (cities) in the Yangtze River economic zone, uses SBM-Undesirable model global Moran’s Index to analyze the temporal-spatial evolution of agricultural ecological efficiency of Yangtze River economic zone and applies panel regression to study its factors. During the study period, the average agricultural ecological efficiency is less than 1, below the effective value, 0。9329, 0.7830 and 0.9624 in the upper-, middle- and down-stream, respectively, showing a downgrade trend from upper-, down- to middle-stream. Gap exists among provinces (cites). The global Moran's Index shows a weakly concentrating tendency, displaying positive, negative and positive concentrating effects over time. The agricultural ecological efficiency showing a positive U-shaped relation with economic development is boosted by farming structure, research and development investment, agricultural intensification and financial supports, but offset by the urbanization.