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Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe
Wang, Liqin1,2; Qi, Yuchun1; Dong, Yunshe1; Peng, Qin1; Guo, Shufang1,2; He, Yunlong1,2; Li, Zhaolin1,2
2017-06-01
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume56Pages:192-201
Corresponding AuthorQi, Yuchun(qiyc@igsnrr.ac.cn)
AbstractHigh nitrous oxide (N2O) emissions during freeze-thawing period (FTP) have been observed in many different ecosystems. However, the knowledge about the dynamic of soil N2O emissions and its main driving mechanism during the freeze-thawing processes in grassland ecosystem is still limited. An in-situ experiment was conducted during the FTP on the sites with 0 and 15% surplus of the average rainfall and two levels of N addition (0,10 g N/(m(2).year)) during growing season (marked as W0N0, W15N0, W0N10, W15N10, respectively) to explore the effects of water and N background on soil N2O emissions during FTPs and the relationship between soil N2O emissions and environmental factors. The results indicated that water and N treatments conducted during growing season did not show significant effect on the N2O effluxes of FTP, but the soil mineral N contents of W0N10 treatment were significantly higher than those of W0N0, W15N0, W15N10 treatments (p < 0.05). The soil PLFA concentrations of microbial groups monitored during 2015 spring freeze-thawing period (2015S-FTP) were lower than those during winter freeze-thawing period of 2014 (2014W-FTP), while cumulative soil N2O emissions of 2015S-FTP were higher than those of 2014W-FTP. The correlations between soil N2O effluxes and most of the measured environmental factors were insignificant, multiple stepwise regression analysis indicated that the soil temperature, soil NH4+-N content and air temperature were the major environmental factors which significantly influenced the N2O effluxes during 2014W-FTP, and air temperature and soil water content were the significant influencing factors during 2015S-FTP. (C) 2016 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
KeywordTemperate semi-arid steppe Nitrous oxide Freeze-thawing period Water and nitrogen addition
DOI10.1016/j.jes.2016.09.013
WOS KeywordNITROUS-OXIDE EMISSIONS ; COLORADO SHORTGRASS STEPPE ; INNER-MONGOLIA ; AGRICULTURAL SOILS ; CARBON-DIOXIDE ; SPRING THAW ; GRASSLAND ; CHINA ; CO2 ; DEPOSITION
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41373084] ; National Natural Science Foundation of China[41330528] ; National Natural Science Foundation of China[41203054]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000404127500022
PublisherSCIENCE PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/63088
Collection中国科学院地理科学与资源研究所
Corresponding AuthorQi, Yuchun
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Liqin,Qi, Yuchun,Dong, Yunshe,et al. Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2017,56:192-201.
APA Wang, Liqin.,Qi, Yuchun.,Dong, Yunshe.,Peng, Qin.,Guo, Shufang.,...&Li, Zhaolin.(2017).Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe.JOURNAL OF ENVIRONMENTAL SCIENCES,56,192-201.
MLA Wang, Liqin,et al."Effects and mechanism of freeze-thawing cycles on the soil N2O fluxes in the temperate semi-arid steppe".JOURNAL OF ENVIRONMENTAL SCIENCES 56(2017):192-201.
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