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| Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China | |
Gu, Xueying; Wang, Yihui1; Laanbroek, Hendrikus J.; Xu, Xiaofeng1; Song, Bing4; Huo, Yawen; Chen, Shiping ; Li, Linghao; Zhang, Lihua1
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| 2019 | |
| Source Publication | GEODERMA
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| ISSN | 0016-7061 |
| Volume | 341Pages:18-25 |
| Abstract | Nitrous oxide (N2O) is one of the most important greenhouse gases emitted by the semi-arid grasslands of Northern China. The majority of previous studies focused on nitrogen (N) deposition and its impacts on N2O emission rates in this region, while the mechanisms and controls of N2O emission and the evidence for a balance point following increasing N deposition remained unclear. In this study, we investigated during 2013-2015 the environmental and plant controls over N2O emission rates within a long-term N addition experiment with nitrogen levels of 1, 2, 4, 8, 16, 32, 64 g N m(-2) yr(-1), respectively, by using an in situ static chamber method. The results showed that N2O emission rates increased with increasing nitrogen addition rates. The emission rates showed significantly positive linear correlations with soil temperature, NO3--N, NH4+-N, inorganic N, microbial biomass carbon, microbial biomass N, total soluble N, below-ground plant biomass and above-ground plant biomass, but a significantly negative correlation with soil pH. A structural equation modeling analysis showed that N addition affected in particular the pH value and subsequently N cycling and soil N2O emission. Meteorological factors impacted N2O emission rates through affecting soil environment and N cycling processes. The formulated N2O emission balance hypothesis was supported and the balance point at which the N2O emission rate became saturated was somewhere between 32 and 64 g N m(-2) yr(-1). The plant N usage efficiency was highest when the rate of N addition was 2 g N m(-2) yr(-1). The increased knowledge of environmental and plant control over soil N2O emission provides a better understanding of N cycling within the semi-arid temperate grassland ecosystem and will be fundamental for quantifying N2O budgets at various scales. |
| Keyword | N2O flux Nitrogen deposition Soil parameters pH value SEM N2O emission balance hypothesis |
| Subject Area | Soil Science |
| DOI | 10.1016/j.geoderma.2019.01.002 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | FERTILIZER NITROGEN ; OXIDE EMISSIONS ; FLUXES ; SOIL ; CO2 ; CH4 ; DENITRIFICATION ; METAANALYSIS ; STEPPE ; BUDGET |
| WOS Research Area | Agriculture |
| WOS ID | WOS:000459520100003 |
| Publisher | ELSEVIER SCIENCE BV |
| Subtype | Article |
| Publication Place | AMSTERDAM |
| EISSN | 1872-6259 |
| Funding Organization | National Key Research and Development Program of China [2016YFA0600803, 2016YFC0500601] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41371111] ; San Diego State University ; National Science FoundationNational Science Foundation (NSF) [1702797] ; SPRUCE project - Office of Biological and Environmental Research in the Department of Energy Office of Science ; NGEE Arctic project - Office of Biological and Environmental Research in the Department of Energy Office of Science |
| Corresponding Author Email | llinghao@ibcas.ac.cn ; zhanglihua@ibcas.ac.cn |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ibcas.ac.cn/handle/2S10CLM1/19401 |
| Collection | 植被与环境变化国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.San Diego State Univ, Biol Dept, San Diego, CA 92182 USA 3.Laanbroek, Hendrikus J.] Netherlands Inst Ecol NIOO KNAW, Dept Microbial Ecol, Wageningen, Netherlands 4.Laanbroek, Hendrikus J.] Univ Utrecht, Ecol & Biodivers Grp, Utrecht, Netherlands 5.Ludong Univ, Sch Resources & Environm Engn, Yantai 264025, Peoples R China |
| Recommended Citation GB/T 7714 | Gu, Xueying,Wang, Yihui,Laanbroek, Hendrikus J.,et al. Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China[J]. GEODERMA,2019,341:18-25. |
| APA | Gu, Xueying.,Wang, Yihui.,Laanbroek, Hendrikus J..,Xu, Xiaofeng.,Song, Bing.,...&Zhang, Lihua.(2019).Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China.GEODERMA,341,18-25. |
| MLA | Gu, Xueying,et al."Saturated N2O emission rates occur above the nitrogen deposition level predicted for the semi-arid grasslands of Inner Mongolia, China".GEODERMA 341(2019):18-25. |
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| 1-s2.0-S001670611831（1046KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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