中国粮食主产区碳排放效率与粮食增产协调发展研究

Coordinated Development of Carbon Emission Efficiency and Grain Yield Increase in China′s Major Grain-Producing Areas

探讨粮食生产碳排放效率与粮食增产协调发展状况,有利于在“双碳”背景下保障粮食安全。该文通过构建粮食生产碳排放测算体系,利用非期望超效率SBM模型测度2001—2022年中国粮食主产区粮食生产碳排放效率,借助耦合协调度模型分析粮食生产碳排放效率与粮食增产协调发展状况。结果表明:研究期内中国粮食主产区粮食生产碳排放效率呈先降后升的“U”形态势,空间上呈“南北高、中间低”的分布特征;粮食生产总量呈增长趋势,重心北移趋势凸显;粮食生产碳排放效率与粮食增产的耦合协调度持续提升,2022年研究区绝大多数省域实现协调发展。根据以上结论为推进粮食增产提质与绿色低碳发展提出政策建议。

Exploring the coordinated development of carbon emission efficiency of grain production and grain yield increase is conducive to ensuring food security under"China′s dual carbon goals".By constructing a measurement system for carbon emission of grain production,this paper adopts the non-expected super-efficiency SBM model to measure the carbon emission efficiency of grain production in China′s major grain-producing areas from 2001 to 2022,and uses the coupling coordination degree model to analyze the coordinated development of carbon emission efficiency of grain production and grain yield increase.It is found as follows.①During the study period,the total grain yield in China′s major grain-producing areas showed an increasing trend,and the center of gravity moved northward.②The carbon emission efficiency showed a U-shaped trend of decreasing first and then increasing,and the spatial distribution characteristics were"high in the north and south,low in the middle".③The coupling coordination degree between carbon emission efficiency of grain production and grain yield increase continued to increase.In 2022,most provinces in the study area achieved coordinated development.Based on the above conclusions,policy recommendations are provided for promoting the grain yield and production efficiency and green and low-carbon development.