Soil organic carbon (SOC) pool in farmland is an important component of the global carbon cycle. Changes of the accumulation and decomposition of SOC are directly related to the carbon storage in terrestrial ecosystems and to the global carbon balance. Soil aggregate is an essential material foundation of soil structure, an important carrier of soil fertility, and also the core of all carbon sequestration. Stable 13C isotope technique is a powerful tool to study the dynamic changes of soil carbon cycle and the roles of soil microorganism in the process of organic carbon turnover. This paper mainly described the research advances of organic carbon cycle the mechanism of carbon sequestration in soil aggregate revealed by 13C stable isotope technology, and briefly proposed the key research contents in the coming future.%农田土壤有机碳库是全球碳循环的重要组成部分,其积累和分解直接影响陆地生态系统碳贮藏与全球碳平衡.土壤团聚体是土壤结构的物质基础和土壤肥力的重要载体,也是土壤有机碳的固定场所.稳定13C同位素示踪技术是研究土壤碳动态变化的有效手段,能够揭示新输入碳在土壤及团聚体中赋存状态、周转过程以及微生物的调节机制.本文主要归纳与阐述了稳定13C同位素示踪技术在农田土壤有机碳循环及土壤团聚体固碳机理方面的研究进展,提出13C同位素示踪技术在未来土壤碳循环和固碳机制方面的主要研究方向.
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