Natural forests exhibit higher organic carbon concentrations and recalcitrant carbon proportions in soil than plantations:a global data synthesis  

作　　者：Xiuqing Nie Hui Wang Jian Wang Shirong Liu 

机构地区：[1]Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,No.2 Dongxiaofu,Haidian District,Beijing 100091,People’s Republic of China

出　　处：《Journal of Forestry Research》2024年第5期131-141,共11页林业研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants 31971463,31930078);the National Key R&D Program of China(Grant 2021YFD2200402);the Chinese Academy of Forestry(Grant CAFYBB2020ZA001).

摘　　要：Different chemical compositions of soil organic carbon(SOC)affect its persistence and whether it signifi-cantly differs between natural forests and plantations remains unclear.By synthesizing 234 observations of SOC chemical compositions,we evaluated global patterns of concentra-tion,individual chemical composition(alkyl C,O-alkyl C,aromatic C,and carbonyl C),and their distribution even-ness.Our results indicate a notably higher SOC,a markedly larger proportion of recalcitrant alkyl C,and lower easily decomposed carbonyl C proportion in natural forests.How-ever,SOC chemical compositions were appreciably more evenly distributed in plantations.Based on the assumed con-ceptual index of SOC chemical composition evenness,we deduced that,compared to natural forests,plantations may have higher possible resistance to SOC decomposition under disturbances.In tropical regions,SOC levels,recalcitrant SOC chemical composition,and their distributed evenness were significantly higher in natural forests,indicating that SOC has higher chemical stability and possible resistance to decomposition.Climate factors had minor effects on alkyl C in forests globally,while they notably affected SOC chemi-cal composition in tropical forests.This could contribute to the differences in chemical compositions and their distrib-uted evenness between plantations and natural stands.

关 键 词：Global data synthesis Natural forest Plantations Soil organic carbon Soil organic carbon chemical composition 

分 类 号：S714[农业科学—林学]