文献类型：期刊文献

英文题名：Three-source partitioning of soil respiration by C-13 natural abundance and its variation with soil depth in a plantation

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

第一作者：Song, Wenchen

通信作者：Tong, XJ[1]|[a00054f722f48ec14379a]同小娟;

机构：[1]Beijing Forestry Univ, Coll Forestry, Beijing 100083, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Tree Breeding & Cultivat, Beijing 100091, Peoples R China

年份：2016

卷号：27

期号：3

起止页码：533-540

外文期刊名：JOURNAL OF FORESTRY RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000375452300006)】；

基金：This study was sponsored by the National Natural Science Foundation of China (31570617; 31100322), Special Public Sector Research (GYHY20110400904) and the Fundamental Research Funds for the Central Universities (NO. YX2011-19; TD2011-07).

语种：英文

外文关键词：Soil respiration; Rhizosphere respiration; Rhizomicrobial respiration; Root respiration; C-13 natural abundance; Soil depth

摘要：Partitioning soil respiration into three components is vital to identify CO2 sink or source and can help us better understand soil carbon dynamics. However, knowledge about the influences of soil depth and the priming effect on soil respiration components under field has been limited. Three components of soil respiration (root respiration, rhizomicrobial respiration and basal respiration) in a plantation in the hilly area of the North China were separated by the C-13 natural abundance method. The results showed that the average proportions of rhizomicrobial respiration, root respiration and basal respiration at the 25-65 cm depths were about 14, 23 and 63 %, respectively. Three components of soil respiration varied with soil depth, and root respiration was the main component of soil respiration in deeper soil. The priming effect was obvious for the deep soil respiration, especially at the 40-50 cm depth. Thus, depth and priming effect should be taken into account to increase the accuracy of estimations of soil carbon flux.