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Microaggregates regulated by edaphic properties determine the soil carbon stock in Tibetan alpine grasslands
Pan, Junxiao1,2; Wang, Jinsong1,2; Zhang, Ruiyang1,2; Tian, Dashuan1,2; Cheng, Xiaoli3; Wang, Song1,2; Chen, Chen1,2; Yang, Lu1,2; Niu, Shuli1,2
2021-11-01
Source PublicationCATENA
ISSN0341-8162
Volume206Pages:8
Corresponding AuthorWang, Jinsong(wangjinsong@igsnrr.ac.cn) ; Niu, Shuli(sniu@igsnrr.ac.cn)
AbstractSoil carbon (C) stock and aggregate associated C are controlled by complex interactions among climate, edaphic, plant, and microbial factors. However, the relative contribution of these abiotic and biotic factors to variations in soil aggregate associated C and their effects on soil C stock are rarely evaluated. In this study, we investigated the influences of climatic, edaphic, plant, and microbial drivers on soil aggregate associated C and their relative contribution to soil C stock, based on a transect study across 45 sites in alpine grasslands on the Tibetan Plateau where stores a large amount of soil C. Microaggregate associated C contributed most to soil C stock, followed by macroaggregate associated C and silt + clay associated C. The variations of each aggregate associated C were related to changes in soil bulk density, soil available nitrogen, soil total nitrogen, root biomass, and bacteria diversity. Among these determinants, the edaphic factors (e.g., bulk density, soil available nitrogen, and total nitrogen) contributed most to the variation of soil C stock, primarily by changing the microaggregate associated C. Our findings highlight the vital roles of soil physicochemical properties in determining aggregate associated C and soil C stabilization across Tibetan alpine grasslands.
KeywordSoil carbon stock Aggregate associated carbon Edaphic factors Soil aggregation Carbon sequestration
DOI10.1016/j.catena.2021.105570
WOS KeywordMICROBIAL COMMUNITY STRUCTURE ; ORGANIC-MATTER ; AGGREGATE STABILITY ; PHYSICAL PROTECTION ; GLOBAL CHANGE ; LAND-USE ; STABILIZATION ; DIVERSITY ; NITROGEN ; MECHANISMS
Indexed BySCI
Language英语
Funding ProjectSecond Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0302] ; National Natural Science Foundation of China[31988102] ; China National Postdoctoral Program for Innovative Talents[BX20200330]
Funding OrganizationSecond Tibetan Plateau Scientific Expedition and Research (STEP) program ; National Natural Science Foundation of China ; China National Postdoctoral Program for Innovative Talents
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000688449100077
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/165475
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang, Jinsong; Niu, Shuli
Affiliation1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
3.Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650091, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Pan, Junxiao,Wang, Jinsong,Zhang, Ruiyang,et al. Microaggregates regulated by edaphic properties determine the soil carbon stock in Tibetan alpine grasslands[J]. CATENA,2021,206:8.
APA Pan, Junxiao.,Wang, Jinsong.,Zhang, Ruiyang.,Tian, Dashuan.,Cheng, Xiaoli.,...&Niu, Shuli.(2021).Microaggregates regulated by edaphic properties determine the soil carbon stock in Tibetan alpine grasslands.CATENA,206,8.
MLA Pan, Junxiao,et al."Microaggregates regulated by edaphic properties determine the soil carbon stock in Tibetan alpine grasslands".CATENA 206(2021):8.
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