Different fates and retention of deposited NH4+ and NO3- in an alpine grassland in northwest China: A N-15 tracer study
文献类型：期刊论文
| 作者 | Wan, Qian1,2,3,4; Yue, Zewei4,5; Liu, Bo6; Liu, Yalan1,2,3,4; Xie, Mingyu1,2,3,4; Li, Lei1,2,3,4 |
| 刊名 | ENVIRONMENTAL AND EXPERIMENTAL BOTANY
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 201页码:8 |
| 关键词 | N-15 tracer Nitrogen deposition Nitrogen retention Nitrogen redistribution Total ecosystem recovery |
| ISSN号 | 0098-8472 |
| DOI | 10.1016/j.envexpbot.2022.104989 |
| 通讯作者 | Li, Lei(lilei@ms.xjb.ac.cn) |
| 英文摘要 | The fates and redistribution of deposited nitrogen (N) determine the influence on N cycling in terrestrial ecosystems. However, the different fates between deposited nitrate nitrogen (NO3-) and ammonium nitrogen (NH4+) as well as the amount of deposited N retained in ecosystems are still not fully understood. We conducted a field experiment to investigate the fates of deposited NO3- and NH4+ by application of stable N-15 isotopes over a period of 455 days in an alpine grassland ecosystem and determined the preference of NO3- and NH4+ for different types of plants. Our research showed that at 15 and 455 days after tracer labeling, the total N-15 recovery of NO3- and NH4+ declined from 48.48% to 21.99% and 49.31-7.87%, respectively, indicating that the long-term NH4+-N retention capacity of alpine grassland was lower than NO3--N. This condition indicated that the changes in deposited N composition can affect the N cycling in ecosystems. Most of N in N-15-NO3- and N-15-NH4+ were immobilized in the litter layer from 22.08% to 9.02% and 36.70-4.53%, respectively, suggesting that the litter layer was the major N sink of NH4+ and NO3-. In addition, 19.13% and 2.81% of added N-15-NO3- were recovered in plant, which was twice more than those of N-15-NH4+ (8.43% and 1.42%), indicating that the preference of plants in our study area was NO3--N. Our results demonstrated the great difference of dynamics in the fate and redistribution of deposition N-NO3- and N-NH4+, about half of atmospherically deposited N-NO3- and N-NH4+ were lost in the initial period, and that mere portion retained within the ecosystem consistently decreased, especially for N-NH4+. Our results also show that the N retention capacity of alpine grassland is relatively weak, resulting in a positively but limited effectiveness in growth and carbon sequestration enhancement. These results can help to assess the ecological effects of N deposition. |
| WOS关键词 | PLANT NITROGEN ACQUISITION ; ROOT PHOSPHATASE-ACTIVITY ; TERRESTRIAL ECOSYSTEMS ; CARBON-CYCLE ; N DYNAMICS ; FOREST ; AMMONIUM ; NITRATE ; RESPONSES ; COMMUNITIES |
| 资助项目 | National Natural Science Foun-dation of China[41807335] ; Shandong Provincial Natural Science Foundation[ZR2020MC040] ; Youth Innovation Promotion Associ-ation of the Chinese Academy of Sciences[2020434] ; National Postdoctoral Program for Innovative Talents[BX201700279] |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000831010700001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foun-dation of China ; Shandong Provincial Natural Science Foundation ; Youth Innovation Promotion Associ-ation of the Chinese Academy of Sciences ; National Postdoctoral Program for Innovative Talents |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/181651]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Lei |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Desert Plant Roots Ecol & Vegetat, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China 3.Cele Natl Stn Observat & Res Desert Grassland Ecos, Cele 848300, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 6.Linyi Univ, Coll Resources & Environm, Shandong Prov Key Lab Soil Conservat & Environm Pr, Linyi 276000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wan, Qian,Yue, Zewei,Liu, Bo,et al. Different fates and retention of deposited NH4+ and NO3- in an alpine grassland in northwest China: A N-15 tracer study[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2022,201:8. |
| APA | Wan, Qian,Yue, Zewei,Liu, Bo,Liu, Yalan,Xie, Mingyu,&Li, Lei.(2022).Different fates and retention of deposited NH4+ and NO3- in an alpine grassland in northwest China: A N-15 tracer study.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,201,8. |
| MLA | Wan, Qian,et al."Different fates and retention of deposited NH4+ and NO3- in an alpine grassland in northwest China: A N-15 tracer study".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 201(2022):8. |
入库方式： OAI收割
来源：地理科学与资源研究所
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