森林土壤CO_(2)、CH_(4)和N_(2)O排放对增温响应的研究进展  

Research Progress on Effects of Warming on Greenhouse Gas Emissions from Forest Soils

作　　者：张强 兰光飞 杨智杰[1,2] 陈仕东 ZHANG Qiang;LAN Guangfei;YANG Zhijie;CHEN Shidong(School of Geographical Sciences,School of Carbon Neutrality Future Technology,Fujian Normal University,Fuzhou 350117,China;Sanming Forest Ecosystem National Observation and Research Station,Sanming 365002,Fujian,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350117 [2]福建三明森林生态系统国家野外科学观测研究站,福建三明365002

出　　处：《亚热带资源与环境学报》2025年第1期62-71,共10页Journal of Subtropical Resources and Environment

基　　金：福建省自然科学基金项目“增温对亚热带常绿格氏栲天然林土壤CO_(2)、CH_(4)和N_(2)O排放的影响”(202310010)。

摘　　要：森林土壤温室气体(CO_(2)、CH_(4)和N_(2)O)在调节大气温室气体浓度方面扮演着重要角色,但有关增温后3种温室气体排放速率的变化大小与方向仍存在争议,且3种温室气体间的耦联关系仍不清晰。本研究综合分析了增温对森林土壤温室气体排放影响的已有研究结果,探讨了增温对温室气体排放的影响,分析了不同研究结果中规律性不一致可能存在的原因,并进一步探讨了这些气体间的耦联关系。总体来看,增温促进森林土壤CO_(2)和N_(2)O的排放,加速CH_(4)的氧化吸收。其变化主要与增温改变了土壤微生物群落结构及丰度,影响了相关微生物活性有关。同样,土壤水分、孔隙度调控的土壤氧环境,以及土壤有机质影响的土壤碳氮底物含量,也是土壤微生物活性及丰度改变的关键影响因素。而这些非生物因素又会对土壤温度升高呈现不同响应,进一步影响微生物活动,使土壤温室气体及其之间的耦联关系表现出更为复杂的变化过程。未来应加强增温与其他多因子耦合作用对土壤温室气体排放通量及机制的研究;应更加关注3种温室气体间存在的耦联关系以及这种耦联关系对增温的响应,从而更加全面的预测未来气候的可能变化,更加有效的应对气候变化带来的影响。Forest soil greenhouse gases(CO_(2),CH_(4)and N_(2)O)play crucial roles in regulating atmospheric greenhouse gas concentrations.However,there is still controversy regarding the magnitude and direction of changes in emission rates of these gases under warming conditions,as well as their coupling relationships and responses to warming.This study comprehensively analyzed the existing research results on the effects of warming on the emission of greenhouse gases from forest soil,explored effects of warming on the emission of greenhouse gases,analyzed the possible reasons for the inconsistency of the rules in different research results,and further explored the coupling relationship between gases.Overall,warming promotes emissions of CO_(2)and N_(2)O from forest soils while accelerating the oxidation and absorption of CH_(4).These changes are primarily attributed to warming-induced alterations in structure and abundance of soil microbial community and affected the activities of relavant microorganism accordingly.Additionally,soil moisture,porosity affecting soil oxygen availability,and soil organic matter influencing soil carbon and nitrogen substrate contents are crucial factors influencing changes in microbial activity and abundance.These factors exhibit diverse responses to the increase of soil temperature,further affecting microbial activities and thereby complicating the dynamics of greenhouse gases and their interactions.Future research should focus on the coupling effects of warming and other environmental factors affecting the fluxes and mechanisms of soil greenhouse gas.Moreover,attention should be paid to the understanding of the coupling relationships among the three greenhouse gases and their responses to warming,aiming to more comprehensively predict the possible changes in future climate and more effectively respond to the impacts of climate change.

关 键 词：二氧化碳 甲烷 氧化亚氮 温室气体 增温 耦联关系 

分 类 号：S718.5[农业科学—林学]