土壤微生物固碳机理及其影响因素研究进展  

Study advances on the mechanism of soil microbial carbon fixation and associated influencing factors

作　　者：郭强[1] 韩子琛 夏允 杨柳明[1,2,3] 范跃新[1,2,3] 杨玉盛[1,2,3] GUO Qiang;HAN Zi-Chen;XIA Yun;YANG Liu-Ming;FAN Yue-Xin;YANG Yu-Sheng(School of Geographical Sciences,School of Carbon Neutrality Future Technology,Fujian Normal University,Fuzhou 350007,China;Key Laboratory of Humid Subtropical Eco-geographical Process of Ministry of Education,Fujian Provincial Key Laboratory for Plant Eco-physiology,Fujian Normal University,Fuzhou 350007,China;Institute of Geography,Fujian Normal University,Fuzhou 350007,China)

机构地区：[1]福建师范大学地理科学学院、碳中和未来技术学院,福州350007 [2]福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福建省植物生理生态重点实验室,福州350007 [3]福建师范大学地理研究所,福州350007

出　　处：《植物生态学报》2024年第11期1406-1421,共16页Chinese Journal of Plant Ecology

基　　金：国家自然科学基金(32192433、32371674和32171587)。

摘　　要：土壤微生物是陆地生态系统碳循环的主要驱动者,不仅通过促进有机碳分解向大气释放CO_(2),还会通过微生物固碳作用固定大气CO_(2)。微生物固碳途径普遍存在于多种生态系统,对全球碳循环具有重要意义。该文通过收集和梳理相关文献,从3个方面综述了土壤微生物固碳的机理和影响因素:1)土壤自养微生物固碳途径;2)土壤异养微生物固碳机理;3)土壤属性、生态系统类型和气候变化(增温、降水变化)等对土壤微生物固碳速率和潜力的影响。该文有助于提升对土壤微生物固碳机理的理解和认识,从微生物固碳角度为陆地生态系统碳库动态以及土壤碳汇的不确定性提供解释,也为完善未来气候变化下陆地碳循环模型提供理论依据。Soil microorganisms are key drivers of carbon(C)cycling in terrestrial ecosystems not only by facilitating soil organic C decomposition and CO_(2)emission,but sequestering atmospheric CO_(2)into soil organic C through microbial C fixation.Due to the ubiquitous presence of microorganisms in soils,microbial C fixation is vital for terrestrial ecosystem C cycle globally.In this paper,we explored the mechanisms and determinants of soil microbial C fixation based on data collections and analyses to address the following the three issues:1)the pathways and processes of autotrophic microbial C fixation in soil;2)the pathways and processes of heterotrophic microbial C fixation in soil;and 3)the impacts of soil properties,ecosystem types,and climate change(i.e.,warming and precipitation change)on microbial C fixation.Overall,the paper provides insights into the dynamics of C fixation in terrestrial ecosystems which is helpful for better understanding the uncertainty of soil C pool in the relationship to microbial C fixation,and which also lays a theoretical foundation for advancing of C cycling models under climate change.

关 键 词：自养微生物固碳 异养微生物固碳 固碳途径 碳循环 气候变化 

分 类 号：S15[农业科学—土壤学]