水力侵蚀作用下土壤有机碳动态研究进展

水蚀作用下土壤有机碳动态对于准确评估土壤侵蚀的碳“源/汇”角色具有重要意义。论述了侵蚀作用对全球碳循环格局产生的影响,阐明了水蚀作用下土壤有机碳动态机制研究的重要意义,并从水蚀作用下土壤碳循环格局以及有机碳库动态过程机制等方面介绍了国内外最新研究进展,进而深入分析了当前研究存在的系列问题及今后的发展趋势。分析认为,以微生物为切入点进行侵蚀作用下的碳矿化研究将有助于从机理层面解决侵蚀在土壤碳循环中的不确定性问题。此外,运用模型模拟的方法全面考察水力侵蚀作用下土壤有机碳库动态机制,将是今后侵蚀作用下土壤碳循环研究中亟待开展的工作。

Advances in Dynamics of Soil Organic Carbon Affected by Water Erosion

Dynamics of soil organic carbon(SOC) affected by water erosion plays an important role in accurate assessment of soil erosion role in carbon cycle.In this paper, we discuss the influence of erosion on the pattern of global carbon cycle, and clarify the significance of research on dynamic mechanism of SOC affected by water erosion. On this basis, we introduce the latest domestic and foreign progresses of SOC pattern and dynamic mechanism of SOC pool, and analyze problems in the current research and the development tendency in the future. Through the research, we conclude that soil microorganisms should be taken as the research objects for SOC mineralization affected by water erosion, which will help us to verify erosion role in soil carbon cycle at mechanism level. Furthermore, in order to fully investigate the dynamic mechanism of SOC affected by water erosion, we can employ model simulation method, and it is an urgent research direction for the research in future.