农田土壤有机碳固存的主要影响因子及其稳定机制

农田生态系统作为陆地生态系统的重要组成部分,在陆地生态系统碳循环过程中发挥重要作用。明确影响农田土壤有机截获的主要因素及土壤固碳的稳定机制,有助于控制和加强农田土壤碳库的固碳潜力,以及正确评价农业生产对全球气候变化的影响。因此,本文综合论述了影响农田土壤碳含量的自然和人为因素,详细阐述了土壤碳固定的物理、化学和生物稳定机制。并总结了已有研究的不足,对今后土壤固碳研究中的热点问题进行了展望。认为从土壤微生物学角度出发,深入研究微生物在土壤有机碳循环中的作用机制,并将地上部和地下部生态系统联系起来探讨土壤碳素稳定性机制更具有重要的意义。

Sequestration of Organic Carbon in Cultivated Soils:Main Factors and Their Stabilization Mechanisms

As one of the most important components in terrestrial ecosystem,cultivated soil plays a critical role in global carbon(C) cycling.Understanding the factors that influence soil organic carbon(SOC) sequestration and the corresponding mechanisms could help us recognize soil C sequestration potential and assess the influence of intensive agriculture on global climate change.Here,the natural and anthropogenic factors that affect soil C storage were reviewed as the physical,chemical and biological mechanisms of SOC stabilization.The knowledge gaps and promising directions of future research were discussed.A combined aboveground-belowground approach was proposed to understand the underlying mechanisms that regulate C storagethe role of soil microorganisms in this process.