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Litter affects CO2 emission from alpine wetland soils experiencing drying-rewetting cycles with different intensities and frequencies
Liang, Chen1; Ding, Yan1,2; Yue, Yi1; Zhang, Xiao-Ya1; Song, Ming-Hua3; Gao, Jun-Qin1; Yu, Fei-Hai4
2021-03-01
Source PublicationCATENA
ISSN0341-8162
Volume198Pages:10
Corresponding AuthorGao, Jun-Qin(gaojq@bjfu.edu.cn)
AbstractThe frequency and intensity of drying-rewetting cycles can influence soil CO2 emission from the soil and carbon (C) and nitrogen (N) in the soil, but little is known about whether such effects can be altered by litter input into the soil, especially for alpine wetland ecosystems. We conducted a 144-day incubation experiment at 15 degrees C using the soil and litter collected from an alpine wetland on the Qinghai-Tibetan Plateau, China. The soil added with 1 g litter or not was subjected to two frequencies (high vs. low, i.e. 18 vs. 9 cycles with 8 vs. 16 days per cycle, corresponding to 100% vs. 50% of the precipitation frequency in that wetland) and two intensities (high vs. low, i.e. 360 mm vs. 252 mm, corresponding to 100% vs. 70% of precipitation in that wetland) of drying-rewetting cycles. Soil moisture was higher in the high than in the low intensity treatment; litter addition affected soil moisture, but such an effect depended on the time of incubation. Low frequency and high intensity of drying-rewetting cycles significantly enhanced CO2 emission due to increases in available substrate, e.g., soil dissolved organic C, which might result in increased activity of soil microbes such as Acidobacteria, Proteobacteria, Actinobacteria, Basidiomycota and Ascomycota. Adding litter to the soil increased CO2 emission from the soil likely due to increased water holding capability and labile C availability. In the low intensity and high frequency treatment concentrations of inorganic N, ammonium N and nitrate N were higher in the soil with than without litter addition, but in the high intensity treatment of both low and high frequency concentrations of inorganic N and nitrate N were lower. CO2 emission was positively correlated with the concentration of dissolved organic C and soil moisture, but negatively correlated with the concentration of ammonium N. Our results suggest that low frequency of drying-rewetting cycles combined with litter addition can enhance soil CO2 emission, and that effects of drying-rewetting cycles should be taken into account when we consider greenhouse gas emission from alpine wetland soils.
KeywordAlpine soil Greenhouse gas emission Qinghai-Tibetan Plateau Soil carbon Soil moisture Soil nitrogen
DOI10.1016/j.catena.2020.105025
WOS KeywordNITROGEN MINERALIZATION ; ORGANIC-MATTER ; MICROBIAL BIOMASS ; CLIMATE-CHANGE ; LEAF-LITTER ; CARBON ; RESPIRATION ; ZOIGE ; DECOMPOSITION ; TEMPERATURE
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41571084] ; National Natural Science Foundation of China[41871077] ; Innovative Transdisciplinary Program Ecological Restoration Engineering of the Beijing Municipal Education Commission
Funding OrganizationNational Natural Science Foundation of China ; Innovative Transdisciplinary Program Ecological Restoration Engineering of the Beijing Municipal Education Commission
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000605337000038
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/136244
Collection中国科学院地理科学与资源研究所
Corresponding AuthorGao, Jun-Qin
Affiliation1.Beijing Forestry Univ, Sch Ecol & Nat Conservat, Beijing 100083, Peoples R China
2.Natl Forestry & Grassland Adm, East China Inventory & Planning Inst, Hangzhou 340019, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, A11 Datun Rd, Beijing 100101, Peoples R China
4.Taizhou Univ, Inst Wetland Ecol & Clone Ecol, Zhejiang Prov Key Lab Plant Evolutionary Ecol & C, Taizhou 318000, Peoples R China
Recommended Citation
GB/T 7714
Liang, Chen,Ding, Yan,Yue, Yi,et al. Litter affects CO2 emission from alpine wetland soils experiencing drying-rewetting cycles with different intensities and frequencies[J]. CATENA,2021,198:10.
APA Liang, Chen.,Ding, Yan.,Yue, Yi.,Zhang, Xiao-Ya.,Song, Ming-Hua.,...&Yu, Fei-Hai.(2021).Litter affects CO2 emission from alpine wetland soils experiencing drying-rewetting cycles with different intensities and frequencies.CATENA,198,10.
MLA Liang, Chen,et al."Litter affects CO2 emission from alpine wetland soils experiencing drying-rewetting cycles with different intensities and frequencies".CATENA 198(2021):10.
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