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Carbon availability affects soil respiration response to drying-rewetting cycles in semiarid grasslands of China under nitrogen deposition
He, Yunlong1,2; Qi, Yuchun1; Peng, Qin1; Dong, Yunshe1; Guo, Shufang1; Yan, Zhongqing1; Li, Zhaolin1
2019-07-01
Source PublicationEUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN1164-5563
Volume93Pages:5
Corresponding AuthorDong, Yunshe(dongys@igsnrr.ac.cn)
AbstractSoil carbon (C) availability is an important limiting factor affecting the magnitude of soil respiration with increasing the drying-rewetting cycle number. Previous studies have reported that because of a deficiency in available C, improved nitrogen (N) availability has no effects on soil respiration in semiarid grasslands. However, it is not well understood whether the effects of N availability on soil respiration in response to drying-rewetting cycles is regulated by C availability in semiarid grasslands under N deposition scenarios. A field experiment was conducted in a semiarid grassland of northern China to investigate the response of soil CO2 efflux to drying-rewetting cycles (natural precipitation events) with the addition of labile C (glucose, 48 g C m(-2) a(-1)) and N (NH4NO3, 10 g N m(-2) a(-1)) in August 2014. The drying-rewetting cycle significantly increased soil respiration rate in the treatments with both C and N additions, whereas it did not significantly increase soil respiration rate in the treatments with added N alone. After the first drying-rewetting cycle, a significant increase in soil microbial biomass C (MBC) content was observed in the treatments with both C and N additions but was not observed in the treatment with added N alone. After a series of drying-rewetting cycles, the cumulative CO2 efflux over the observed period was significantly higher in the treatments with both C and N additions than that in the treatment with added N alone. These findings imply that improved N availability during the period of 20 days has no effects on soil respiration in response to the drying-rewetting cycle due to microbial C limitation under N deposition scenarios in a semiarid grassland.
KeywordSoil respiration Carbon availability Nitrogen deposition Soil microbes Drying-rewetting cycle
DOI10.1016/j.ejsobi.2019.103089
WOS KeywordMICROBIAL BIOMASS ; DIFFERENTIAL RESPONSES ; N-MINERALIZATION ; WATER ; COMMUNITIES ; FREQUENCY ; ADDITIONS ; STORAGE
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41573131] ; National Natural Science Foundation of China[41673086] ; National Natural Science Foundation of China[41330528]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology ; Agriculture
WOS SubjectEcology ; Soil Science
WOS IDWOS:000479022600004
PublisherELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68921
Collection中国科学院地理科学与资源研究所
Corresponding AuthorDong, Yunshe
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
2.Chinese Acad Forestry, Res Inst Forestry, State Forestry Adm, Key Lab Forest Silviculture, Beijing 100091, Peoples R China
Recommended Citation
GB/T 7714
He, Yunlong,Qi, Yuchun,Peng, Qin,et al. Carbon availability affects soil respiration response to drying-rewetting cycles in semiarid grasslands of China under nitrogen deposition[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2019,93:5.
APA He, Yunlong.,Qi, Yuchun.,Peng, Qin.,Dong, Yunshe.,Guo, Shufang.,...&Li, Zhaolin.(2019).Carbon availability affects soil respiration response to drying-rewetting cycles in semiarid grasslands of China under nitrogen deposition.EUROPEAN JOURNAL OF SOIL BIOLOGY,93,5.
MLA He, Yunlong,et al."Carbon availability affects soil respiration response to drying-rewetting cycles in semiarid grasslands of China under nitrogen deposition".EUROPEAN JOURNAL OF SOIL BIOLOGY 93(2019):5.
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