农业用水效率的区域差异与收敛特征研究——基于湖北省80个县(市、区)的分析

Regional Disparities and Convergence Characteristics of Agricultural Water Use Efficiency Based on Analysis of 80 Counties in Hubei Province

基于全局超效率SBM-DEA模型,测度了2008—2021年湖北省县域农业用水效率的动态演进规律,并结合Dagum基尼系数和σ、β收敛检验模型,探究了湖北省农业用水效率的地区差异和收敛特征。结果表明:2008—2021年湖北及鄂东、鄂中、鄂西地区的农业用水效率均呈现上升趋势,各地区效率差距整体呈扩大趋势,地区间差异是影响总体差距的主要原因。各区域农业用水效率均不存在σ收敛特征,存在典型的β收敛特征,在加入5个外部因素后,β收敛速度显著提升,且影响效应在不同地区间存在显著异质性。最后基于研究结论,提出了针对性策略以促进农业用水效率的提升,以期为节水农业的可持续发展提供科学依据和实用建议。

Based on the global super efficiency SBM-DEA model,combined with the Dagum Gini coefficient andσandβconvergence analysis methods,this study measures the dynamic evolution of agricultural water use efficiency in Hubei Province from 2008 to 2021,and further explores its regional disparities and convergence characteristics.The results show that the agricultural water use efficiency in Hubei and its eastern,central and western regions is on an upward trend from 2008 to 2021,and the efficiency gap between regions is gradually expanding as a whole,with inter-regional differences being the main source of the overall gap.There is noσconvergence of agricultural water use efficiency in each region,and there are typicalβconvergence characteristics.After adding 5 external factors,the speed ofβconvergence is significantly improved,and the impact effect is heterogeneous in different regions.Finally,based on the research conclusions,the paper puts forward targeted strategies to promote the improvement of agricultural water use efficiency,in order to provide scientific basis and practical suggestions for the sustainable development of water-saving agriculture.