文献类型：期刊文献

英文题名：SOIL HETEROTROPHIC RESPIRATION AND ACTIVE CARBON POOLS UNDER SUBTROPICAL FORESTS IN CHINA

作者：Wang, D.[1] Gu, L.[2,3]

第一作者：Wang, D.

通信作者：Gu, L[1];Gu, L[2]

机构：[1]Beijing Municipal Cty Bur Landscape & Forestry, Songshan Natl Nat Reserve Adm, Beijing 102115, Peoples R China;[2]Chinese Acad Forestry, State Forestry Adm, Key Lab Tree Breeding & Cultivat, Res Inst Forestry, Beijing 100091, Peoples R China;[3]State Forestry Adm, Urban Forest Res Ctr, Beijing 100091, Peoples R China

年份：2017

卷号：29

期号：4

起止页码：438-447

外文期刊名：JOURNAL OF TROPICAL FOREST SCIENCE

收录：;EI(收录号：20174604385093);Scopus(收录号：2-s2.0-85033223707);WOS:【SCI-EXPANDED(收录号:WOS:000422653000005)】；

基金：This study was funded by the Special Fund for Forestry Scientific Research in Public Interest (No. 201404303 & 201204101). The authors would like to thank W Dai, GD Zhao, JS Wang, F Cai, ZQ Yu and ZY Wang for their assistance in the experiment.

语种：英文

外文关键词：Microbial biomass carbon; water-soluble organic carbon; carbon mineralisation; subtropical forests

摘要：An understanding of the heterotrophic respiration part of belowground processes, as affected by active carbon, is crucial in order to predict the response of carbon emission from soil organic carbon, in forest ecosystems and climatic changes. However, in the current literature, most soil respiration measurements are interpreted without simultaneous information on active carbon pool dynamics. In this study, path analysis was used to demonstrate the impacts of microbial biomass carbon, water-soluble organic carbon and mineralisation carbon on soil heterotrophic respiration. It was found that variations in heterotrophic respiration were well related to mineralisation carbon and microbial biomass carbon, whereas water-soluble organic carbon was generally not adequate indicators of carbon effluxes. Mineralisation carbon and microbial biomass carbon have significant correlation relationships and indirect effects with each other on heterotrophic respiration, indicating a possible stimulatory effect of labile carbon and microbial activity on microbial processing of carbon. A single parameter recommended to quantify soil heterotrophic respiration in southern China is mineralisation carbon, as the most efficient measurement of soil variable.