Microaggregates regulated by edaphic properties determine the soil carbon stock in Tibetan alpine grasslands

doi:10.1016/j.catena.2021.105570

	Microaggregates regulated by edaphic properties determine the soil carbon stock in Tibetan alpine grasslands
	Pan, Junxiao 1,2; Wang, Jinsong 1,2; Zhang, Ruiyang 1,2; Tian, Dashuan 1,2; Cheng, Xiaoli 3; Wang, Song 1,2; Chen, Chen 1,2; Yang, Lu 1,2; Niu, Shuli 1,2
刊名	CATENA
	2021-11-01
卷号	206 页码:8
关键词	Soil carbon stock Aggregate associated carbon Edaphic factors Soil aggregation Carbon sequestration
ISSN号	0341-8162
DOI	10.1016/j.catena.2021.105570
通讯作者	Wang, Jinsong(wangjinsong@igsnrr.ac.cn) ; Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要	Soil 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.
资助项目	Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0302] ; National Natural Science Foundation of China[31988102] ; China National Postdoctoral Program for Innovative Talents[BX20200330]
WOS关键词	MICROBIAL COMMUNITY STRUCTURE ; ORGANIC-MATTER ; AGGREGATE STABILITY ; PHYSICAL PROTECTION ; GLOBAL CHANGE ; LAND-USE ; STABILIZATION ; DIVERSITY ; NITROGEN ; MECHANISMS
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000688449100077
资助机构	Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; National Natural Science Foundation of China ; China National Postdoctoral Program for Innovative Talents
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/165474]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang, Jinsong; Niu, Shuli
作者单位	1.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
推荐引用方式 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.