DOI: 10.1111/gcb.13379
论文题名: Land-use contrasts reveal instability of subsoil organic carbon
作者: Hobley E. ; Baldock J. ; Hua Q. ; Wilson B.
刊名: Global Change Biology
出版年: 2017
卷: 23, 期: 2 起始页码: 955
结束页码: 965
语种: 英语
英文关键词: agriculture
; climate
; deep soil carbon
; fractions
; land-use change
; radiocarbon
英文摘要: Subsoils contain large amounts of organic carbon which is generally believed to be highly stable when compared with surface soils. We investigated subsurface organic carbon storage and dynamics by analysing organic carbon concentrations, fractions and isotopic values in 78 samples from 12 sites under different land-uses and climates in eastern Australia. Despite radiocarbon ages of several millennia in subsoils, contrasting native systems with agriculturally managed systems revealed that subsurface organic carbon is reactive on decadal timeframes to land-use change, which leads to large losses of young carbon down the entire soil profile. Our results indicate that organic carbon storage in soils is input driven down the whole profile, challenging the concept of subsoils as a repository of stable organic carbon. © 2016 John Wiley & Sons Ltd 资助项目: Hobley, E.
; University of New EnglandAustralia
; 电子邮件: nellie.hobley@wzw.tum.de
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61066
Appears in Collections: 影响、适应和脆弱性
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作者单位: University of New England, Armidale, NSW, Australia; CSIRO Agriculture, Urrbrae, SA, Australia; Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW, Australia; Office of Environment and Heritage, Armidale, NSW, Australia
Recommended Citation:
Hobley E.,Baldock J.,Hua Q.,et al. Land-use contrasts reveal instability of subsoil organic carbon[J]. Global Change Biology,2017-01-01,23(2)