中国生态农业学报2025，Vol.33Issue(6)：1195-1206,12.DOI:10.12357/cjea.20240660
土地细碎化、农业生产效率与农业碳排放
Land fragmentation,agricultural production efficiency and agricultural carbon emission
摘要
Abstract
Land fragmentation is the phenomenon of dispersed cultivated land distribution in household production under resource constraints.Decentralization of the operational scale increases redundant inputs,raises production costs,and hinders improvements in agricultural production efficiency.Increased frequency of production and input often leads to increased agricultural carbon emissions,thereby impeding high-quality agricultural development.Against this backdrop,integrating the relationships between land fragmenta-tion,agricultural production efficiency,and agricultural carbon emissions to clarify their mechanisms is crucial for reducing agricul-tural carbon emissions and enhancing production efficiency.In light of this,this study employed land use,agricultural input-output data,and agricultural carbon emission data from 2011 to 2020 in the three provinces of Northeast China to construct an evaluation system and a mediating effect model to investigate the relationships and mechanisms among the three variables.First,ArcGIS and Fragstats landscape pattern software were used to calculate land fragmentation.The DEA-SBM model was applied to measure agri-cultural production efficiency,and the TOPSIS entropy method was used to weight and compute agricultural carbon emissions.Second,a two-way fixed-effects model and a mediating effects model were adopted to analyze the relationships among land frag-mentation,agricultural carbon emission intensity,and agricultural production efficiency.Finally,heterogeneity analyses were conduc-ted based on urbanization rates and income levels of rural residents.The findings revealed:1)Land fragmentation in northeastern China fluctuated between 2011 and 2020,with higher fragmentation in the western regions and lower levels in the northern areas.Ag-ricultural production efficiency showed an upward trend in the eastern and southern regions,with efficiency being significantly high-er in the east than in the west.Overall,agricultural carbon emissions declined,with higher emissions in the west and lower levels in the north.2)Land fragmentation had a significant positive impact on agricultural carbon emissions,with increased fragmentation-elevating emissions.Agricultural production efficiency played a mediating role in this process,accounting for 15.3％ of the medi-ation effect.3)The promoting effect of land fragmentation on agricultural carbon emissions was stronger in regions with higher urb-anization rates and rural income levels.Therefore,it is recommended to enhance land resource consolidation,promote large-scale in-tensive agricultural management models,advance low-carbon and high-efficiency agricultural development,reduce carbon emissions,and achieve high-quality agricultural growth.关键词
土地细碎化/农业生产效率/农业碳排放/中介效应Key words
land fragmentation/agricultural production efficiency/agricultural carbon emissions/mediating effect分类
农业科技引用本文复制引用
黄进,常淏,田野,王伟..土地细碎化、农业生产效率与农业碳排放[J].中国生态农业学报,2025,33(6):1195-1206,12.基金项目
湖北省哲学社会科学基金项目(23ZD152)和全国统计科学重点项目(2024LZ006)资助 This study was supported by the Hubei Provincial Philosophy and Social Science Foundation Project(23ZD152)and the National Key Project of Stat-istical Science of China(2024LZ006). （23ZD152）
