IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Annual N2O emissions from conventionally grazed typical alpine grass meadows in the eastern Qinghai-Tibetan Plateau
Zhang, Han1,2; Yao, Zhisheng2; Wang, Kai2; Zheng, Xunhua2,3; Ma, Lei2,3; Wang, Rui2; Liu, Chunyan2; Zhang, Wei2; Zhu, Bo4; Tang, Xiangyu4; Hu, Zhenghua1; Han, Shenghui2
2018
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
EISSN1879-1026
Volume625Pages:885-899
SubtypeArticle
Contribution Rank4
AbstractAnnual nitrous oxide (N2O) emissions from high-altitude alpine meadow grasslands have not been effectively characterized because of the scarcity of whole-year measurements. The authors performed a year-round measurement of N2O fluxes from three conventionally grazed alpine meadows that represent the typical meadow landscape in the eastern Qinghai-Tibetan Plateau (QTP). The results showed that annual N2O emissions averaged 0.123 +/- 0.053 (2SD, i.e., the double standard deviation indicating the 95% confidence interval) kg N ha(-1) yr(-1) across the three meadow sites. N2O flux pulses during the spring freezing-thawing period (FTP) were observed at only one site, indicating a large spatial variability in association with soil moisture differences. Approximately 34-57% (mean: 46%) of the annual N2O emissions occurred in the non-growing season, highlighting the substantial importance of accurate flux observations during this period. The simultaneous observations showed conservative, marginal nitric oxide (NO) fluxes of 0.058 +/- 0.032 (2SD) kg N ha(-1) yr(-1). The N2O fluxes across the three field sites correlated negatively with the soil nitrate concentrations during the entire year-round period (P < 0.05). Furthermore, a significant joint regulatory effect of topsoil temperature and moisture on the N2O and NO fluxes was observed during the relatively warm periods. Based on the results of the present and previous studies, a simple extrapolation roughly estimated the annual total N2O emission from Chinese grasslands to be 73 +/- 15 (2SD) Gg N yr(-1) (1 Gg = 10(9) g). A linear dependence of the annual N2O fluxes on the aboveground net primary productivity (ANPP) was also found. This result may provide a simple approach for estimating the N2O emission inventories of frigid alpine or temperate grasslands that are ungrazed either in the summer or year round. However, further confirmation of this relationship with a wider ANPP range is still needed in the future studies. (c) 2017 Elsevier B.V. All rights reserved.
KeywordNitrous oxide emission Nitric oxide emission Alpine grass meadow Non-growing season Spring thaw Above ground net primary productivity
DOI10.1016/j.scitotenv.2017.12.216
Indexed BySCI
WOS KeywordNITROUS-OXIDE EMISSIONS ; COLORADO SHORTGRASS STEPPE ; MAIZE CROPPING SYSTEM ; NITRIC-OXIDE ; INNER-MONGOLIA ; NORTHERN CHINA ; SPATIAL VARIABILITY ; SEMIARID GRASSLAND ; WHEAT ROTATION ; METHANE UPTAKE
Language英语
Quartile2区
Funding ProjectMinistry of Science and Technology of China[2016YFA0602303] ; Ministry of Science and Technology of China[2012CB417100] ; National Natural Science Foundation of China[41603075] ; National Natural Science Foundation of China[41375152] ; National Natural Science Foundation of China[41321064]
TOP
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000426356600091
Funding OrganizationMinistry of Science and Technology of China ; National Natural Science Foundation of China
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/22514
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorZheng, Xunhua
Affiliation1.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Coll Appl Meteorol, Nanjing 210044, Jiangsu, Peoples R China;
2.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China;
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China;
4.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Han,Yao, Zhisheng,Wang, Kai,et al. Annual N2O emissions from conventionally grazed typical alpine grass meadows in the eastern Qinghai-Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,625:885-899.
APA Zhang, Han.,Yao, Zhisheng.,Wang, Kai.,Zheng, Xunhua.,Ma, Lei.,...&Han, Shenghui.(2018).Annual N2O emissions from conventionally grazed typical alpine grass meadows in the eastern Qinghai-Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,625,885-899.
MLA Zhang, Han,et al."Annual N2O emissions from conventionally grazed typical alpine grass meadows in the eastern Qinghai-Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 625(2018):885-899.
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