污染排放约束下长江经济带农业绿色水资源利用效率研究

基于超效率SBM模型和GML指数对2011—2019年长江经济带农业绿色水资源利用效率进行了时空差异分析及动态演变趋势分析,并在此基础上运用Tobit回归模型实证检验了农业绿色水资源利用效率的影响因素。研究结果表明:2011—2019年长江经济带农业绿色水资源利用效率整体时序变化平稳,但内部空间差异显著；多数地区的技术效率水平未跟上行业技术变革的步伐；政府管控水平、农田水利建设水平等对农业绿色水资源利用水平呈显著正向影响。指出长江经济带各地区应通过创新农业用水方式、挖掘节水减排潜力等方式来改善其农业水资源利用现状。

Utilization efficiency of agricultural green water resources in the Yangtze River Economic Belt under the constraint of pollution discharge

Based on the super-efficient SBM model and GML index, the temporal and spatial differences and dynamic evolution trend of agricultural green water utilization efficiency in the Yangtze River Economic Belt from 2011 to 2019 were analyzed. On this basis, the Tobit regression model was used to empirically test the influencing factors of agricultural green water utilization efficiency. The research results show that the overall time series of agricultural green water utilization efficiency in the Yangtze River Economic Belt from 2011 to 2019 changed steadily, but the internal spatial differences were significant. The technical efficiency level in most regions did not keep up with the pace of industrial technological change. And the level of government control and the level of farmland and water conservancy construction have a significant positive impact on the utilization level of agricultural green water resources. The paper proposes that the regions of the Yangtze River Economic Belt should improve their agricultural water resources utilization status by innovating agricultural water use methods and exploring the potential of water saving and emission reduction.