文献类型：期刊文献

英文题名：Differential Response of Soil Respiration and Total Belowground Carbon Allocation to Simulated Nitrogen and Phosphorus Deposition in Moso Bamboo Forests

作者：Li, Jingji[1,2] Yang, Zhihan[3] Tang, Xiaolu[1,2,4] Liu, Liang[3] Lai, Yunsen[3] Lei, Junjie[3] Zeng, Changli[1] Ma, Xinshan[1] Du, Manyi[5] Cai, Chunju[6] Fan, Shaohui[6]

第一作者：Li, Jingji

通信作者：Tang, XL[1];Tang, XL[2];Tang, XL[3];Fan, SH[4]

机构：[1]Chengdu Univ Technol, Coll Ecol & Environm, Chengdu 610059, Peoples R China;[2]Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Prot, Chengdu 610059, Peoples R China;[3]Chengdu Univ Technol, Coll Earth Sci, Chengdu 610059, Peoples R China;[4]Chengdu Univ Technol, State Environm Protect Key Lab Synerget Control &, Chengdu 610059, Peoples R China;[5]Chinese Acad Forestry, Expt Ctr Forestry North China, Beijing 102300, Peoples R China;[6]Int Ctr Bamboo & Rattan, Key Lab Bamboo & Rattan, Beijing 100102, Peoples R China

年份：2022

卷号：13

期号：11

外文期刊名：FORESTS

收录：;EI(收录号：20230913640842);Scopus(收录号：2-s2.0-85148695324);WOS:【SCI-EXPANDED(收录号:WOS:000895253100001)】；

基金：This study was supported by the National Natural Science Foundation of China (31800365), the Fundamental Research Funds for Platform of the International Centre for Bamboo and Rattan (1632020003), the Operation Funding of Innovation Platform of Forest and Grass Technology (2021132033 and 2021132035), the Opening Funding of Research Centre of TaiPing of Anhui of the International Centre for Bamboo and Rattan (TPKF202102), and the State Key Laboratory of Geohazard Prevention and Geoenvirnment Protection Independent Research Project (SKLGP2018Z004 and SKLGP2021K024).

语种：英文

外文关键词：N and P deposition; autotrophic respiration; heterotrophic respiration; net ecosystem production; root carbon-use efficiency

摘要：Elevated nitrogen (N) and phosphorus (P) depositions have greatly affected belowground carbon processes in forest ecosystems. However, open questions still remained on the effects of N and P depositions on belowground carbon processes, including soil respiration (RS), its source components-autotrophic respiration (RA) and heterotrophic respiration (RH), and total belowground carbon allocation (TBCA) in Moso bamboo forests-one of the most important forest types with wide distributions in subtropical China. To fill this knowledge gap, a two-year N, P, and NP experiment was conducted in Moso bamboo forests. Results showed that RS, RA, and RH had a strong seasonal variability and were exponentially correlated with soil temperature. N and P depositions did not change RS and RA. However, P deposition increased RH due to the stimulation of microbial activities, indicating a significant soil carbon loss under P deposition. N and P depositions did not affect TBCA. However, NP deposition significantly increased root carbon-use efficiency. Net ecosystem production (NEP) varied from 198 +/- 104 to 529 +/- 225 g C m(-2) year(-1), indicating that Moso bamboo is an important carbon sink. P deposition marginally decreased NEP, while N and NP depositions did not affect NEP, which indicates that N deposition alleviated the suppression of P deposition on NEP. These findings highlight the inconsistent responses of RA, RH, and NEP to N, P, and NP depositions, which should be differently considered to increase the accuracy of predicting belowground carbon dynamics.