Contrasting effects of litter and root removals on soil N2O emissions of an evergreen broadleaved forest in southeastern China
文献类型：期刊论文
| 作者 | Zhang, Lei6; Lin, Weisheng5,6,7; Sardans, Jordi3,4; Xu, Enlan6; Hui, Dafeng2; Liu, Xiaofei5,6,7; Wang, Jinsong1; Chen, Shidong5,7; Guo, Jianfen5,6,7; Penuelas, Josep3,4 |
| 刊名 | APPLIED SOIL ECOLOGY
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 206页码:11 |
| 关键词 | Detritus removal manipulations Nitrous oxide emission Nitrogen form Evergreen broadleaved forest |
| ISSN号 | 0929-1393 |
| DOI | 10.1016/j.apsoil.2025.105867 |
| 通讯作者 | Guo, Jianfen(jfguo@fjnu.edu.cn) |
| 英文摘要 | Impacts of global change on nitrous oxide (N2O) emissions, specifically related to alterations in leaf litter and root mass inputs to forest soils, remain uncertain. In this study, we removed litter and roots by placing nylon nets above and below ground, respectively, to investigate the effects of reduced litter (L), roots (R), and combined removal of litter and roots (LR) in a semi-natural evergreen broadleaved forest. We examined how these manipulations influenced soil N2O emissions and associated drivers over a 12-month period. Our findings indicate that annual soil N2O emissions were reduced by 31.4 % and 38.9 % under the L and LR treatments, respectively, while emissions increased by 10.1 % under R treatment. Net ammonification rates increased under the R treatment, whereas the rates decreased under the LR treatment. Reduced leaf litter inputs resulted in a decrease in soil dissolved organic carbon (DOC) concentration and an increase in nitrate (NO3-) concentration. Root removal led to a decline in dissolved organic nitrogen and NO3-concentration. We identified key drivers of soil N2O emissions as soil water content, NO3-concentration, and soil microbial community composition. The reduction in DOC resulting from litter removal constrained the activity of denitrifying bacteria, leading to a decrease in soil N2O emissions. Conversely, the removal of root material promoted a higher ratio of ectomycorrhizal fungi (ECM) to arbuscular mycorrhizal fungi (AMF), indicating a greater restriction on NO3-uptake by AMF. This reduction in root NO3 - uptake resulted in an excess release of NO3 - in the soil. In the presence of DOC, this excess was not mitigated in the R treatment, consequently promoting soil N2O emissions. Our study highlights that root removal increases the ECM/AMF ratio and thus increases N2O emissions, while litter removal reduces N2O emissions by reducing soil water content and DOC content. |
| WOS关键词 | ORGANIC-MATTER ; DENITRIFICATION ; PLANTATION ; DYNAMICS ; CARBON ; FUNGI ; LAYER |
| 资助项目 | National Natural Science Foundation of China[32271717] ; China Scholarship Council (CSC) Grant[202308350025] ; Foreign Cooperation Project of the Science and Technology Department of Fujian Province[2022I0012] ; Natural Science Foundation of Fujian Province[2021J01179] ; Public Program of Fujian Technology Committee[2021R1002004] ; Natural Science Foundation of Carbon Neutral Research Institute, Fujian Normal University[TZH2022-01] ; Spanish MCIN[TED2021-132627B-I00] ; European Union NextGeneration EU/PRTR ; [31930071] ; [2022R1002001] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:001397577500001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; China Scholarship Council (CSC) Grant ; Foreign Cooperation Project of the Science and Technology Department of Fujian Province ; Natural Science Foundation of Fujian Province ; Public Program of Fujian Technology Committee ; Natural Science Foundation of Carbon Neutral Research Institute, Fujian Normal University ; Spanish MCIN ; European Union NextGeneration EU/PRTR |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/212727]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Guo, Jianfen |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Tennessee State Univ, Dept Biol Sci, Nashville, TN 37209 USA 3.CREAF, Catalonia 08193, Spain 4.CREAF CSIC UAB, CSIC, Global Ecol Unit, Catalonia 08193, Spain 5.Fujian Sanming Forest Ecosyst Natl Observat & Res, Sanming 365002, Peoples R China 6.Fujian Normal Univ, Fujian Prov Key Lab Plant Ecophysiol, Fuzhou 350117, Peoples R China 7.Fujian Normal Univ, Inst Geog, Fuzhou 350117, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Lei,Lin, Weisheng,Sardans, Jordi,et al. Contrasting effects of litter and root removals on soil N2O emissions of an evergreen broadleaved forest in southeastern China[J]. APPLIED SOIL ECOLOGY,2025,206:11. |
| APA | Zhang, Lei.,Lin, Weisheng.,Sardans, Jordi.,Xu, Enlan.,Hui, Dafeng.,...&Yang, Yusheng.(2025).Contrasting effects of litter and root removals on soil N2O emissions of an evergreen broadleaved forest in southeastern China.APPLIED SOIL ECOLOGY,206,11. |
| MLA | Zhang, Lei,et al."Contrasting effects of litter and root removals on soil N2O emissions of an evergreen broadleaved forest in southeastern China".APPLIED SOIL ECOLOGY 206(2025):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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