玉米生态效率的时空差异及收敛性

The temporal and spatial differences and convergence of maize eco-efficiency

运用EBM-Super-Malmquist指数法对2004—2018年玉米主产省(市、自治区)的生态效率进行测算,分析玉米生态效率的时间演变和地区分布特征,并运用收敛性方法检验玉米生态效率的收敛性。结果表明,玉米生态效率表现出波动下降趋势,地区之间存在明显的非均衡性特征;全国及四大区域玉米生态效率不存在σ收敛和绝对β收敛,地区差异不会无条件地缩小;全国及四大区域玉米生态效率存在显著的条件β收敛,受灾率、财政支持力度、人力资本是影响玉米生态效率条件β收敛的重要因素。

Maize eco-efficiency of the main producing provinces(cities and autonomous regions)from 2004 to 2018 was calculated by the EBM-Super-Malmquist index method,the temporal evolution and spatial distribution characteristics of maize eco-efficiency were analyzed,and the convergence of maize eco-efficiency was tested by the convergence method.The results showed that,maize eco-efficiency showed a fluctuating downward trend,and there were obvious characteristics of imbalance between regions.There were noσconvergence and absoluteβconvergence in maize eco-efficiency across the country and the four major regions,and regional dif-ferences would not be unconditionally narrowed.There were significant conditionβconvergence for maize eco-efficiency across the country and the four major regions.Disaster rate,financial support and human capital were important factors that affectedβconver-gence of maize eco-efficiency condition.