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Release of Carbon and Nitrogen from Alpine Soils During Thawing Periods in the Eastern Qinghai-Tibet Plateau
Gao, Yongheng1; Zeng, Xiaoyang2; Xie, Qingyan1; Ma, Xingxing1
Corresponding AuthorYongheng Gao
2015
Source PublicationWATER AIR AND SOIL POLLUTION
ISSN0049-6979
EISSN1573-2932
Volume226Issue:7Pages:10.1007/s11270-015-2479-2
SubtypeArticle
AbstractSoil thawing can affect the turnover of soil carbon (C) and nitrogen (N) and their release into the atmosphere. However, little has been known about the release of C and N during the thawing of alpine soils in the Qinghai-Tibet Plateau. This study investigated the effects of soil thawing on the release of CO2, CH4, and N2O from alpine peatland soils and alpine meadow soils through an indoor experiment and determined the changes in the dissolved organic C (DOC), dissolved organic N (DON), NO3--N, NH4+-N, and NO2--N concentrations in the soils after soil thawing. The freeze-thaw treatments were performed by incubating the soil columns at mild (-5 degrees C) and severe (-15 degrees C) for 14 days, and then at 5 degrees C for 18 days. The control columns were incubated at 5 degrees C. During thawing, the cumulative CO2 emissions from the severely frozen alpine peatland soils and alpine meadow soils were 36 and 85 % higher than those from the control soils, and the cumulative N2O emissions were 3.9 and 5.8 times higher than those from the control soils. However, the thawing after mild freezing produced no significant effects. The two freezing temperatures significantly increased the release of CH4 from the alpine peatland soils, but the thawing of the severely frozen soils reduced the CH4 uptake of the alpine meadow soils by 27 %. After the severely frozen alpine peatland soils thawed, the concentrations of DOC, DON, NO3--N, NH4+-N, and NO2--N increased significantly, but NO2--N showed no significant changes for the alpine meadow soils. After thawing with mild freezing, DOC in the alpine peatland soils and NH4+-N, NO2--N, and DOC in the alpine meadow soils showed no significant changes. This study indicates that the potential for release of C and N from alpine soils during thawing periods strongly depends on the freezing temperature and soil types.
KeywordFreezing-thaw Soil Carbon Nitrogen Availability Alpine Peatland Climate Change
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1007/s11270-015-2479-2
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources
Indexed BySCI
WOS KeywordN2O EMISSIONS ; FOREST SOIL ; GAS FLUXES ; ORGANIC-MATTER ; GRASSLAND SOIL ; CYCLES ; TUNDRA ; CO2 ; TEMPERATURE ; METHANE
Language英语
Quartile4区
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WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences ; Water Resources
WOS IDWOS:000357690100016
Funding OrganizationNational Basic Research Program (973) of China(2012CB417101) ; National Science Foundation(41271276)
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/9606
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolut & Regulat, Chengdu, Peoples R China
2.Sichuan Coll Architectural Technol, Dept Landscape Architecture, Deyang, Peoples R China
Recommended Citation
GB/T 7714
Gao, Yongheng,Zeng, Xiaoyang,Xie, Qingyan,et al. Release of Carbon and Nitrogen from Alpine Soils During Thawing Periods in the Eastern Qinghai-Tibet Plateau[J]. WATER AIR AND SOIL POLLUTION,2015,226(7):10.1007/s11270-015-2479-2.
APA Gao, Yongheng,Zeng, Xiaoyang,Xie, Qingyan,&Ma, Xingxing.(2015).Release of Carbon and Nitrogen from Alpine Soils During Thawing Periods in the Eastern Qinghai-Tibet Plateau.WATER AIR AND SOIL POLLUTION,226(7),10.1007/s11270-015-2479-2.
MLA Gao, Yongheng,et al."Release of Carbon and Nitrogen from Alpine Soils During Thawing Periods in the Eastern Qinghai-Tibet Plateau".WATER AIR AND SOIL POLLUTION 226.7(2015):10.1007/s11270-015-2479-2.
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