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全球土壤有机碳库储量丰富且活跃,而作为碳流失主要驱动力的土壤侵蚀对陆地碳循环影响巨大,揭示其影响将对气候变化背景下深刻理解碳收支过程和相关政策的制定具有重要意义。该文主要介绍了近年来国内外关于水蚀和风蚀影响土壤有机碳流失过程的研究进展,分析了侵蚀条件下土壤碳的源汇争议,简述了土壤有机碳流失的原位和异位环境效应,并提出了相关研究的主要现实问题和未来发展方向。在侵蚀进程中,土壤有机碳的固定与流失并存,流失部分主要包括在地表径流泥沙和土壤呼吸过程中,当前相关研究多集中于侵蚀有机碳的去向问题。在一定的景观范围内,定量刻画侵蚀过程中土壤碳输入输出关系是今后区域碳循环研究领域亟待解决的关键科学问题。
The global soil organic carbon stocks are abundant and active, and soil erosion, which is the main driver of carbon loss, has a great impact on the terrestrial carbon cycle. It is of great significance to reveal its impact on the understanding of the carbon budget and the related policies in the context of climate change . This paper mainly introduces the research progress of soil organic carbon loss affected by water and wind erosion at home and abroad in recent years, analyzes the source and sink dispute of soil carbon under erosion, and briefly describes the in situ and ex situ environmental effects of soil organic carbon loss , And put forward the main realistic problems and the future development direction of related research. In the process of erosion, the fixation and loss of soil organic carbon coexist, and the loss mainly includes the processes of surface runoff and sediment and soil respiration. At present, most researches focus on the problem of the erosion of organic carbon. Quantitatively characterizing the relationship between input and output of soil carbon during erosions is a key scientific issue to be solved in the field of carbon cycle research in the future within a certain range of landscape.