文献类型：期刊文献

英文题名：Effects of stand age and soil microbial communities on soil respiration throughout the growth cycle of poplar plantations in northeastern China

作者：Liu, Xiangrong[1,2] Hou, Lingyu[1,2] Ding, Changjun[1,2] Su, Xiaohua[1,2] Zhang, Weixi[1,2] Pang, Zhongyi[3] Zhang, Yanlin[1,2] Sun, Qiwu[1,2]

第一作者：Liu, Xiangrong

通信作者：Ding, CJ[1];Sun, QW[1];Ding, CJ[2];Sun, QW[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry Ad, Beijing, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Efficient Prod Forest Resource, Beijing, Peoples R China;[3]State Owned Xinmin City Machinery Forest Farm, Shenyang, Peoples R China

年份：2024

卷号：15

外文期刊名：FRONTIERS IN MICROBIOLOGY

收录：;Scopus(收录号：2-s2.0-85211604600);WOS:【SCI-EXPANDED(收录号:WOS:001373294600001)】；

基金：The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. This research was funded by the National Key Research and Development Program of China (Grant Nos. 2021YFD2201201 and 2021YFD2201205), the Basic Research Fund of CAF (Grant No. CAFYBB2023QB003).

语种：英文

外文关键词：soil respiration; stand age; soil microbial community structure and function; poplar plantation; microbial r-K selection theory

摘要：Introduction Many studies have identified stand age and soil microbial communities as key factors influencing soil respiration (Rs). However, the effects of stand age on Rs and soil microbial communities throughout the growth cycle of poplar (Populus euramevicana cv.'I-214') plantations remain unclear.Methods In this study, we adopted a spatial approach instead of a temporal one to investigate Rs and soil microbial communities in poplar plantations of 15 different ages (1-15 years old).Results The results showed that Rs exhibited clear seasonal dynamics, with the highest rates observed in the first year of stand age (1-year-old). As stand age increased, Rs showed a significant decreasing trend. We further identified r-selected microbial communities (copiotrophic species) as key biological factors influencing the decline in Rs with increasing stand age. Other abiotic factors, such as soil temperature (ST), pH, soil organic carbon (SOC), nitrate nitrogen (NO3--N), and the C/N ratio of plant litter (Litter C/N), were also significantly correlated with Rs. Increased stand age promoted fungal community diversity but suppressed bacterial community diversity. Bacterial and fungal communities differed significantly in abundance, composition, and function, with the Litter C/N ratio being a key variable affected by microbial community changes.Conclusion This study provides crucial empirical evidence on how stand age affects Rs, highlighting the connection between microbial community assemblages, their trophic strategies, and Rs over the growth cycle of poplar plantations.