模拟增温对土壤有机碳含量、组分和化学结构的影响:进展与展望  

Effects of simulated warming on content,fractions and chemical structure of soil organic carbon:Progress and prospects

作　　者：孙瑞丰 韩广轩[1,2,3] SUN Ruifeng;HAN Guangxuan(CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation,Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai 264003,Shandong,China;Yellow River Delta Field Observation and Research Station of Coastal Wetland Ecosys-tem,Chinese Academy of Sciences,Dongying 257500,Shandong,China;University of Chinese Academy of Sci-ences,Beijing 100049,China)

机构地区：[1]中国科学院烟台海岸带研究所中国科学院海岸带环境过程与生态修复重点实验室,山东烟台264003 [2]中国科学院黄河三角洲滨海湿地生态系统野外科学观测研究站,山东东营257500 [3]中国科学院大学,北京100049

出　　处：《应用生态学报》2024年第9期2432-2444,共13页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(U2106209,42071126);国家重点研发计划项目(2022YFF0802101)资助。

摘　　要：土壤有机碳库是陆地生态系统最大的碳库,在减缓全球气候变化中发挥重要作用。温度升高通过影响土壤有机碳库的收支平衡和稳定过程,进而对土壤有机碳含量、组分和化学结构产生影响。当前通过解析有机碳组分和分子结构,揭示增温对土壤有机碳稳定性的影响及其机制已成为研究热点。本文从土壤有机碳含量、组分和化学结构三个方面综述了增温对土壤有机碳库的影响,总结了植物生产力和群落特征、微生物活性和群落结构等关键生态系统过程对增温的响应。建议未来应从系统阐明相关微生物机制、定量解析土壤有机碳来源和周转过程、建立长期动态的联网实验和挖掘优化碳循环模型中的关键参数等方面,加强前瞻布局和系统研究,为更好地理解全球变暖下的土壤有机碳动态变化与机制以及预测气候变化下土壤有机碳库的潜在变化趋势提供理论支持。Soil organic carbon(SOC)represents the largest terrestrial organic carbon pool and plays an important role in mitigating global climate change.Warming can change the stabilization process and the balance of inputs and outputs of the SOC pool,thereby affecting the content,fraction,and chemical structure of SOC.It has become a re-search hotspot to reveal the mechanisms underlying the effects of warming on SOC stability by analyzing the fraction and molecular structure of C.Here,we reviewed the warming effects on the SOC pool from three aspects,e.g.,the content,fraction,and chemical structure of SOC.We also summarized the response of key ecosystem processes to warming,including plant productivity and community composition,microbial activity and community structure.We highlighted the importance of prospective and systematic research focusing on elucidating the microbial mechanism,identifying SOC source and turnover processes,establishing long-term dynamic networked experiments,and mining and optimizing key parameters in C cycle models.This would provide theoretical support for better understanding the change and mechanism of SOC under global warming and predicting the alterations of SOC pool under climate change.

关 键 词：增温 土壤有机碳 有机碳组分 化学结构 

分 类 号：S153.6[农业科学—土壤学]