农业碳排放占全球人为碳排放的比例已接近三分之一。若不采取有效措施来降低或减缓农业碳排放,则在未来来自于农业的碳排量将会继续乃至显著增加。厘清农业碳排放的研究进展,是确定未来研究方向继而指导农业碳减排的前提与基础。本文基于Web of Science的SCI-EXPANDED与SSCI数据库数据,运用CiteSpaceⅢ软件对农业碳排放研究文献进行共被引聚类分析、关键节点分析以及突现词分析,以期发掘农业碳排放领域的研究前沿及其演进趋势。结果表明：(1)农业碳排放文献呈逐年递增趋势,属于生态环境与农业的交叉学科。(2)农地/土壤碳排与碳汇研究、农业生产非CO2类温室气体排放研究、农产品碳足迹研究以及土地利用变化的碳排与碳汇效应研究是主要的前沿主题。(3)农业碳排放领域的前沿演进有相对明显的脉络可循,对农地/土壤碳排与碳汇的研究就从实验研究与情境研究,发展至综合已有测算数据或者说已有知识的元分析,然后是基于过程模型的模型化研究(例如脱氮分解模型,DNDC)。(4)基于生命周期分析法的农产品碳足迹、气候变化背景下粮食安全问题与生物炭运用在近两年呈现高度突现,是后续学术研究需要重点关注的领域。

Carbon emissions from agricultural sectors account for a third of all human-made carbon emissions. If no effective measures are taken, then the amount of agricultural emissions would increase steadily and dramatically. Figuring out the evolution of research on agricultural emissions is the prerequisite and foundation for exploring future research directions and guiding agricultural carbon reduction. Based on the databases, SCI-EXPANDED and SSCI, in Web of Science, this paper conducted the cluster analysis of co-citation, the analysis of pivotai-point articles and the burst analysis of keywords, adopting CiteSpace Ш. The results show that: (1) the number of articles about agricultural emissions raised annually; studies on agricultural emissions stand at the crossroads between ecology-environment science and the agricultural science. (2) Major research fronts include research on “the carbon emission and carbon sequestration of farmland/soil”, “non-co2 greenhouse gas producted by agricultural activities”, “the carbon footprint of agri-products” and “the carbon emission and carbon sequestration of land use change”. (3) the evolution process of research within this realm turned out to be clear, which stepped from field experiment or scenario analysis to present knowledge analysis or meta analysis, and then to analysis adopting process-based model (such as DeNitrification-DeComposition, DNDC). (4) the carbon footprint of agri-products adopting life cycle analysis, the food security problem under climate change situation, and the application of biochar have become the strongest citation bursts in the recent two years, which should be given more attention by future academic research.

本文得到国家自然科学基金面上项目(编号：71273105)和中央高校基本科研业务费专项(编号：2662014BQ046)的资助。