文献类型：期刊文献

英文题名：Autotrophic and heterotrophic components of soil respiration caused by rhizosphere priming effects 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]

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

年份：2017

卷号：63

期号：7

起止页码：295-299

外文期刊名：PLANT SOIL AND ENVIRONMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000405832200002)】；

基金：Supported by the National Natural Science Foundation of China, Grants No. 31570617 and 31100322.

语种：英文

外文关键词：forest ecosystem; nutrient cycling; stable isotope; microorganism; carbon dioxide

摘要：Root-exudate inputs can stimulate the decomposition of soil organic carbon by priming microbial activity, but its ecological significance is still not fully understood. This study evaluated autotrophic respiration and heterotrophic respiration driven by roots using the C-13 natural abundance method in a Robinia pseudoacacia plantation. The results showed that the priming effect existed in deep soil of the plantation. The proportions of autotrophic respiration and heterotrophic respiration deriving from priming effect to total soil respiration varied with soil depth. Rhizomicrobial respiration (RMR) accounted for about 15% of the total soil respiration, and the rate of priming decomposition of soil organic matter (PSOM) was only about 5% of the total soil respiration. RMR was significantly positively correlated with PSOM. Heterotrophic respiration derived by the priming effect was too weak to have a positive impact on atmospheric CO2.