DOI: 10.1007/s10533-015-0093-4
Scopus记录号: 2-s2.0-84930276556
论文题名: Subtropical giant podzol chronosequence reveals that soil carbon stabilisation is not governed by litter quality
作者: Jones A.R. ; Sanderman J. ; Allen D. ; Dalal R. ; Schmidt S.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 124, 期: 2018-01-03 起始页码: 205
结束页码: 217
语种: 英语
英文关键词: Chronosequence
; Litter quality
; Radiocarbon
; Soil carbon
; Soil nutrients
; Turnover
Scopus关键词: biochemical composition
; carbon dioxide
; carbon flux
; carbon isotope
; carbon sequestration
; chronosequence
; environmental fate
; litter
; mineral
; Podzol
; soil carbon
; soil horizon
; soil microorganism
; soil nutrient
; soil organic matter
; soil stabilization
; subtropical region
; turnover
英文摘要: The magnitude of the carbon flux between soil and atmosphere has prompted efforts to better understand the controls over the fate of carbon in plant litter that re-enters the atmosphere as carbon dioxide or is sequestered as soil organic carbon (SOC). It remains unresolved if the long-term fate of litter carbon is driven by biochemical properties of litter or by soil properties that reduce the ability of soil organisms to decompose litter-derived carbon. The prominent role that reactive soil minerals play in stabilising SOC have hindered investigation into the single role of litter quality on long-term SOC stability. Here we investigated the independent effects of litter quality on soil carbon stabilisation across a 460,000 year sand dune chronosequence characterised by a pronounced nutrient and litter quality gradient with minimum presence of interfering soil minerals. Using a steady state turnover model to interpret radiocarbon activity in soils collected ≈40 years apart, we show that the turnover time of SOC in the A horizon averaged 22 years (ranging from 16 to 27 years) across the chronosequence. This finding strongly contrasts other chronosequences where SOC turnover rates range from 60 to 726 years in concert with changing abundance and composition of soil minerals. Our study demonstrates that the long-term stability of SOC in surface horizons may be largely determined by interaction with soil minerals and that litter quality per se does not govern carbon stabilisation. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83505
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of Agriculture and Food Sciences, The University of Queensland, St Lucia, QLD, Australia; Department of Science, Information Technology and Innovation, GPO Box 5078, Brisbane, QLD, Australia; CSIRO Agriculture Flagship, Waite Campus, Urrbrae, SA, Australia
Recommended Citation:
Jones A.R.,Sanderman J.,Allen D.,et al. Subtropical giant podzol chronosequence reveals that soil carbon stabilisation is not governed by litter quality[J]. Biogeochemistry,2015-01-01,124(2018-01-03)