中国生态农业学报（中英文）2025，Vol.33Issue(3)：435-448,14.DOI:10.12357/cjea.20240125
深层土壤有机碳储量、稳定性以及对人类活动响应的研究进展
Research advances on deep soil organic carbon storage,stability and responses to human activities
摘要
Abstract
Soil,one of the largest carbon reservoirs in the ecosystem,has substantial storage capacity and significantly affects global climate change.Currently,most studies on soil organic carbon storage and turnover focus on topsoil organic carbon(0-1 m)(SSOM),whereas systematic studies on the storage,stability and responses of subsoil organic carbon below 1 m(DSOM)to human activities are relatively limited.This study comprehensively reviewed the latest studies focusing on the storage,sources,composition,stability,and human activity responses to DSOM.Globally,the storage of subsoil organic carbon ranges from 29.9 to 219.6 t·hm-2,accounting for 15%-84%of the total soil organic carbon storage.The average age of the DSOM is between 4 800 and 28 100 a,with a turnover time spanning from 1 000 to 4 285 a.The stability of DSOM is significantly higher than that of SSOM,mainly due to the anaerobic environment,mineral protection and chemical inertness of DSOM.The key factors affecting the stability of DSOM include excessive fertilization,changes in cropping systems and fluctuations in groundwater levels.Although the mineralization rate of DSOM is signi-ficantly lower than that of SSOM,human activities,such as nitrate leaching due to excessive nitrogen fertilizer application,changes in cropping systems and groundwater level fluctuations,have significantly reduced the stability of DSOM in some regions,potentially having a profound impact on global climate change.The substantial storage potential of DSOM for carbon sequestration is comprised by these activities,which may lead to the release of stored carbon back into the atmosphere,thereby exacerbating global warming.Previous studies indicate that the substantial storage of DSOM has significant potential for carbon sequestration,and human activities may have comprised its stability,potentially leading to profound effects on global climate change.Therefore,investi-gating the DSOM is crucial.However,the underlying mechanisms and processes have not been fully explored,and further compre-hensive research is required.Future studies should focusing on 1)assessing the storage and stability of regional/global subsoil car-bon pools,2)clarifying the mechanisms by which subsoil organic carbon pools responding to human activities,and 3)quantifying the contribution of human activity-induced subsoil organic carbon release to global warming.These research directions are essential to fully understand and leverage the role of DSOM in climate change mitigation and ensure the sustainability of our planet for future generations.In summary,the study of DSOM is at the vanguard of soil science and global change research,necessitating a multi-disciplinary convergence of pedology,geochemistry,microbiology and environmental science.Advancing our understanding of DSOM is the key to harnessing its capacity as a natural climate change mitigation tool and securing the planet's sustainability for future generations.关键词
全球气候变化/深层土壤有机碳/碳储量/碳稳定性/人类活动/矿化Key words
global climate change/deep soil organic carbon/carbon storage/carbon stability/human activities/mineralization分类
农业科学引用本文复制引用
王高起,袁丹,吴萍,秦树平,胡春胜..深层土壤有机碳储量、稳定性以及对人类活动响应的研究进展[J].中国生态农业学报（中英文）,2025,33(3):435-448,14.基金项目
中国科学院科研项目、国家重点研发计划项目(2021YFD1500400)、河北省基金委创新研究群体项目(D2022503014)和河北省土壤生态学重点实验室建设补助经费项目(226790207H)资助 This study was supported by the Research Project of the Chinese Academy of Sciences,the National Key R&D Program of China(2021YFD1500400),the Innovation Group Project of the Natural Science Foundation of Hebei Province(D2022503014),and the Construction Sub-sidy Fund for Hebei Key Laboratory of Soil Ecology(226790207H). （2021YFD1500400）
