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Effects of changing C and N availability on soil respiration dynamics in a temperate grassland in northern China
He, Yunlong1,2; Qi, Yuchun1; Dong, Yunshe1,2; Peng, Qin1; Guo, Shufang1,2; Yan, Zhongqing1,2; Li, Zhaolin1,2; Wang, Liqin1,2
2018-11-01
Source PublicationGEODERMA
ISSN0016-7061
Volume329Pages:20-26
Corresponding AuthorDong, Yunshe(dongys@igsnrr.ac.cn) ; Peng, Qin(pengqin@igsnrr.ac.cn)
AbstractSoil carbon (C) availability may play a crucial role in regulating how soil respiration responds to the increase of nitrogen (N) inputs. However, the related research is sporadic so far and has not adequately verified this speculation or addressed the topic in a widespread temperate grassland ecosystem. This lack of knowledge hinders our further accurate prediction of C emissions from terrestrial ecosystems. To improve our knowledge of the role of soil C resources in regulating Rs responses to N inputs, we established a situ field experiment with three levels of N addition (0, 50, and 100 kg N ha(-1) yr(-1)) and two levels of glucose (G) addition (0 and 480 kg C ha(-1) yr(-1)) to determine the Rs dynamics in a temperate semiarid grassland in China. The results showed that only N addition had no significant effects on Rs as well as microbial biomass C (MBC) during our 168-hour observation period, whereas G addition and G addition together with N addition had positive effects on Rs and MBC. The regression analysis further showed that the cumulative CO2 efflux was significantly positively related to soil MBC concentrations during the 168-hour observation period. Altogether, our findings verify that soil C availability is an important driver affecting the Rs response to N addition. No response of Rs to increased N availability resulting from N input was attributed to microbial C limitation in a semiarid grassland during a 168-hour observation.
KeywordSoil respiration C availability N deposition Microbial biomass Semiarid grassland
DOI10.1016/j.geoderma.2018.03.020
WOS KeywordSIMULATED NITROGEN DEPOSITION ; MICROBIAL BIOMASS ; SEMIARID GRASSLAND ; ENZYME-ACTIVITIES ; INNER-MONGOLIA ; ORGANIC-CARBON ; LABILE CARBON ; FERTILIZATION ; WATER ; METAANALYSIS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41330528] ; National Natural Science Foundation of China[41573131] ; National Natural Science Foundation of China[41673086] ; National Natural Science Foundation of China[41373084] ; National Natural Science Foundation of China[41203054] ; Special Fund for Agro-scientific Research in the Public Interest[201203012] ; National Science & Technology Infrastructure Supports
Funding OrganizationNational Natural Science Foundation of China ; Special Fund for Agro-scientific Research in the Public Interest ; National Science & Technology Infrastructure Supports
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000436221200003
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54644
Collection中国科学院地理科学与资源研究所
Corresponding AuthorDong, Yunshe; Peng, Qin
Affiliation1.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, 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
He, Yunlong,Qi, Yuchun,Dong, Yunshe,et al. Effects of changing C and N availability on soil respiration dynamics in a temperate grassland in northern China[J]. GEODERMA,2018,329:20-26.
APA He, Yunlong.,Qi, Yuchun.,Dong, Yunshe.,Peng, Qin.,Guo, Shufang.,...&Wang, Liqin.(2018).Effects of changing C and N availability on soil respiration dynamics in a temperate grassland in northern China.GEODERMA,329,20-26.
MLA He, Yunlong,et al."Effects of changing C and N availability on soil respiration dynamics in a temperate grassland in northern China".GEODERMA 329(2018):20-26.
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