草地碳循环主要影响因素及研究方法进展

Main influence factors and research methods of grassland carbon cycling: a review

摘要:

在气候变化和人类活动的耦合影响下，草地生态系统碳循环过程发生显著变化。本文首先介绍了草地碳循环研究的背景与重要性，详细分析了国内外草地碳循环的研究进展，包括草地生态系统碳源汇的界定和土壤呼吸的研究近况，气候变化和人类活动等主要因素对草地碳循环的影响，草地碳循环研究过程中主要采用的技术方法，以及已取得的重要结果与结论。在此基础上讨论了现有草地碳循环研究存在的不足与问题，阐述了未来草地碳循环研究前景及重点研究方向，以期为“双碳”背景下陆地生态系统碳循环研究提供理论依据。

Abstract:

Under the coupling effects of climate change and human activities，the carbon cycles of the steppe eco-system have changed significantly. This paper introduced the background and importance of the grassland carbon cycle，and then presented the domestic and overseas’ grassland carbon cycle research progress，including discussions of carbon source and carbon sinks，the research status of soil respiration，the influence of climate change and human ac- tivities on the grassland carbon cycles，the main technology methods，as well as some important results and conclu- sions in studying grassland carbon cycle detailed. On this basis，deficiencies and problems，existing in the research of the grassland carbon cycle，were analyzed，future research prospects were expounded，and the key research directions were put forward，so as to provide a theoretical basis for the research of the terrestrial ecosystem carbon cycle in the context of “dual carbon” goal.