文献类型：期刊文献

英文题名：How a Root-Microbial System Regulates the Response of Soil Respiration to Temperature and Moisture in a Plantation

作者：Song, Wenchen[1] Tong, Xiaojuan[1] Zhang, Jinsong[2] Meng, Ping[2] Li, Jun[3]

第一作者：Song, Wenchen

通信作者：Tong, XJ[1];Zhang, JS[2]

机构：[1]Beijing Forestry Univ, Coll Forestry, Beijing, Peoples R China;[2]Chinese Acad Forestry, Key Lab Tree Breeding & Cultivat, State Forestry Adm, Res Inst Forestry, Beijing, Peoples R China;[3]Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China

年份：2018

卷号：27

期号：6

起止页码：2749-2756

外文期刊名：POLISH JOURNAL OF ENVIRONMENTAL STUDIES

收录：;Scopus(收录号：2-s2.0-85049859897);WOS:【SCI-EXPANDED(收录号:WOS:000439622000034)】；

基金：This study was sponsored by the National Natural Science Foundation of China (31570617, 31100322). We would also like to thank Dr. Joanne Di Maio for his assistance with English language and grammatical editing of the manuscript.

语种：英文

外文关键词：soil respiration; temperature; moisture; root-microbial system; natural delta C-13 abundance

摘要：Understanding the response of soil respiration to changes in temperature and moisture is critical to accurately assess the impact of afforestation on regional carbon balance. In order to investigate the response of soil respiration to soil temperature and moisture, we partitioned soil respiration into three components (heterotrophic respiration, root respiration, and rhizomicrobial respiration) using C-13 natural abundance during the growing season in a Robinia pseudoacacia plantation in northern China. Root respiration and soil microbial respiration had a significantly positive relationship with soil temperature. Heterotrophic respiration was positively correlated with soil moisture, while rhizomicrobial respiration significantly decreased with a reduction in soil moisture. Our findings suggest that the responses of plant roots and soil microorganisms to soil temperature and moisture were different. According to the prediction of the rootmicrobial model developed in this study, average soil respiration will increase by 12 mg C m(-2) h(-1) when soil temperature increases by 2 degrees C in the plantation. By modelling the relationship of a root-microbial system during the growing season in a plantation in northern China, the temperature and moisture sensitivities of soil respiration can be characterized.