长江经济带农业用水效率评价及时空演变——基于SBM-Malmquist模型

Evaluation and spatiotemporal evolution of agricultural water use efficiency in the Yangtze River Economic Belt——Based on SBM-Malmquist model

利用SBM模型、Malmquist指数法对长江经济带11个省(市)的农业用水效率进行分析,基于核密度分析工具分析其时空演变趋势。结果表明,2011—2020年长江经济带11个省(市)农业用水效率整体未达到有效状态,农业用水效率平均值排序为下游地区>上游地区>中游地区;技术进步和中性无偏绿色技术进步是推动效率提升的主要力量;随时序变化全要素生产效率的省际分化集中程度逐渐减弱;依空间分异全要素生产效率变化指数排序为中游地区>上游地区>下游地区。未来应协调区域治理需求和发展目标,推动水资源结构升级,加强科技投入和科技创新,为农业用水效率提升提供动力。

Using the SBM model and Malmquist index method,the agricultural water use efficiency of 11 provinces(cities)in the Yangtze River Economic Belt and its spatiotemporal evolution trend based on nuclear density analysis tools were analyzed.The results showed that from 2011 to 2020,the overall agricultural water use efficiency of 11 provinces(cities)in the Yangtze River Economic Belt did not reach an effective state,and the average agricultural water use efficiency ranked in the following order:downstream region>upstream region>midstream region;technological progress and neutral and unbiased green technological progress were the main forc⁃es driving efficiency improvement;the concentration degree of inter-provincial differentiation of total factor production efficiency grad⁃ually weakened due to sequential changes at any time;according to spatial differentiation,the change index of total factor productivity was ranked in the order of midstream region>upstream region>downstream region.In the future,it was necessary to coordinate regional governance needs and development goals,promote the upgrading of water resources structure,strengthen scientific and technological investment and innovation,and provide impetus for improving agricultural water efficiency.