Grassland soil organic carbon pool becomes a focus in the field of grassland ecosystem in recent years due to the advance in the global climate change and transfer of carbon of the terrestrial ecosystems in various ways.Grassland soil organic carbon is an important component of the global carbon cycle,directly affecting on the global carbon balance.The impact of human-induced climate warming resulting from the increase of greenhouse gases on grassland ecosystems arouses the considerable attention.Temperature,precipitation,atmospheric CO2 concentration,and other climatic factors greatly influence on the grassland soil organic carbon pool.Understanding the effects of climate change on the grassland soil organic carbon pool is critical for predicting the changes in grassland ecosystem carbon cycling in the future.This study summarized the advance in the distribution of organic carbon storage in the grassland soils and the effects of temperature,precipitation change,and elevated atmospheric CO2 concentration on grassland soil organic carbon storage,and then proposed the problems,direction and key field of grassland soil organic carbon in the future.%随着全球气候变化和陆地生态系统碳循环研究的发展,草地土壤有机碳库正成为草地生态系统研究的热点。草地土壤有机碳库作为全球碳循环的重要组成部分,其积累和分解的变化直接影响全球的碳平衡。由人类活动引起的温室效应以及由此造成的气候变化对草地生态系统的影响已引起人们的广泛关注,而温度、降水和大气CO2浓度等气候因子对草地土壤碳库也产生重要影响。了解气候变化对草地土壤有机碳库的影响对于准确理解气候变化背景下草地土壤有机碳的演变机制具有重要的指导意义。本研究综述了草地土壤有机碳储量的分布状况以及温度升高、降水和大气CO2浓度增加对草地土壤有机碳影响的国内外研究进展,指出了目前草地土壤有机碳研究存在的问题,提出了今后研究的努力方向和着重点,并对今后草地土壤有机碳研究提出了展望。
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