Nitrification derived N2O emission increases but denitrification derived N2O emission decreases with N enrichment in both topsoil and subsoil
文献类型：期刊论文
| 作者 | Song, Lei2,3; Pan, Junxiao3; Wang, Jinsong2,3; Yan, Yingjie2,3; Niu, Shuli1,2,3 |
| 刊名 | CATENA
 |
| 出版日期 | 2023-03-01 |
| 卷号 | 222页码:9 |
| ISSN号 | 0341-8162 |
| 关键词 | Nitrogen deposition gradient Nitrous oxide Production pathway Deep soil Functional gene Grassland |
| DOI | 10.1016/j.catena.2022.106890 |
| 通讯作者 | Niu, Shuli(sniu@igsnrr.ac.cn) |
| 英文摘要 | Clarifying responses of nitrification-derived N2O (N2On) emission and denitrification-derived N2O (N2Od) emission to increasing nitrogen (N) deposition and the corresponding control factors help to better understand and predict the soil total N2O (N2OT) emission in the context of global change. However, these have not been well studied, particularly at different soil layers. Here, we measured those different N2O fluxes with laboratory in-cubation and the corresponding soil abiotic and biotic properties along a field N addition gradient at three soil depths in an alpine meadow. The results show that, with increasing N addition, both N2OT and N2On emissions linearly increased, but N2Od emission linearly decreased at all soil depths (p < 0.05). The N2On emission was correlated neither with the nitrification rate nor the abundance of nitrifier genes, but was positively correlated with the proportion of N2On being emitted from nitrification (PN2On), which became larger with N enrichment (p < 0.05). The N2Od emission was positively correlated with the abundance of narG and nirS genes, which decreased with N enrichment (p < 0.05). These results reveal that the N2On and N2Od emissions responded differently to increasing N deposition in both topsoil (0-10 cm) and subsoil (10-20 and 20-40 cm), and that the increase in N2On emission was responsible for the higher N2OT emission with N enrichment. These findings extend the current understanding of the mechanism underlying increased N2OT emission with N enrichment, as previous studies have ignored the possibility of a depressed N transformation process derived N2O emission. The dynamics of PN2On and the abundance of narG and nirS in both topsoil and subsoil should be noted to better predict N2On and N2Od emissions, and therefore, N2OT emission in the context of enhanced N deposition. |
| WOS关键词 | NITROUS-OXIDE EMISSIONS ; SHORT-TERM N2O ; FERTILIZER NITROGEN ; FOREST SOIL ; DEPOSITION ; CARBON ; WATER ; CO2 ; COMMUNITIES ; TEMPERATURE |
| 资助项目 | Second Tibetan Plateau ScientificExpedition and Research (STEP) program[2019QZKK0302] ; National Natural ScienceFoundation of China[31988102] |
| WOS研究方向 | Geology ; Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000920482800001 |
| 资助机构 | Second Tibetan Plateau ScientificExpedition and Research (STEP) program ; National Natural ScienceFoundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/189512]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Niu, Shuli |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Lei,Pan, Junxiao,Wang, Jinsong,et al. Nitrification derived N2O emission increases but denitrification derived N2O emission decreases with N enrichment in both topsoil and subsoil[J]. CATENA,2023,222:9. |
| APA | Song, Lei,Pan, Junxiao,Wang, Jinsong,Yan, Yingjie,&Niu, Shuli.(2023).Nitrification derived N2O emission increases but denitrification derived N2O emission decreases with N enrichment in both topsoil and subsoil.CATENA,222,9. |
| MLA | Song, Lei,et al."Nitrification derived N2O emission increases but denitrification derived N2O emission decreases with N enrichment in both topsoil and subsoil".CATENA 222(2023):9. |
入库方式： OAI收割
来源：地理科学与资源研究所
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