农田土壤碳饱和机制研究进展

Advances of Soil Carbon Saturation Mechanisms in Agroecosystems

农田土壤有机碳是土壤肥力的核心,与全球碳循环和气候变化密切相关。然而,土壤有机碳水平并非无限度增加而是存在一个最大容量,或称之为碳饱和水平。本文综述了土壤有机碳的稳定机制、碳饱和理论及其关联性,总结了土壤碳饱和概念模型和饱和亏缺预测等方面的研究进展,分析了我国农田土壤碳饱和效应研究现状,并对未来研究方向进行了展望。

Soil organic carbon（ SOC） sequestration in croplands plays a critical role in enhancing soil fertility,global C cycle and associated climate change. However,soils could potentially sequester additional C following changes in management practices until the maximum soil C capacity,or soil C saturation,is achieved. This paper summarizes the current research advances on SOC stabilization mechanisms,C saturation theory and conceptual models,as well as the methods used to estimate C saturation deficit. Current status of carbon saturation researches of China,and perspectives in future studies are also presented.