globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12402
论文题名:
Higher temperature sensitivity for stable than for labile soil organic carbon - Evidence from incubations of long-term bare fallow soils
作者: Lefèvre R.; Barré P.; Moyano F.E.; Christensen B.T.; Bardoux G.; Eglin T.; Girardin C.; Houot S.; Kätterer T.; van Oort F.; Chenu C.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:2
起始页码: 633
结束页码: 640
语种: 英语
英文关键词: Activation energy ; Long-term bare fallow experiments ; Soil carbon dynamic ; Stable soil carbon ; Temperature sensitivity
Scopus关键词: activation energy ; carbon dioxide ; fallow ; organic carbon ; soil carbon ; soil organic matter ; temperature ; carbon ; agriculture ; article ; chemistry ; Denmark ; France ; heat ; metabolism ; microbiology ; soil ; Sweden ; Agriculture ; Carbon ; Denmark ; France ; Hot Temperature ; Soil ; Soil Microbiology ; Sweden
英文摘要: The impact of climate change on the stability of soil organic carbon (SOC) remains a major source of uncertainty in predicting future changes in atmospheric CO2 levels. One unsettled issue is whether the mineralization response to temperature depends on SOC mineralization rate. Long-term (>25 years) bare fallow experiments (LTBF) in which the soil is kept free of any vegetation and organic inputs, and their associated archives of soil samples represent a unique research platform to examine this issue as with increasing duration of fallow, the lability of remaining total SOC decreases. We retrieved soils from LTBF experiments situated at Askov (Denmark), Grignon (France), Ultuna (Sweden), and Versailles (France) and sampled at the start of the experiments and after 25, 50, 52, and 79 years of bare fallow, respectively. Soils were incubated at 4, 12, 20, and 35 °C and the evolved CO2 monitored. The apparent activation energy (Ea) of SOC was then calculated for similar loss of CO2 at the different temperatures. The Ea was always higher for samples taken at the end of the bare-fallow period, implying a higher temperature sensitivity of stable C than of labile C. Our results provide strong evidence for a general relationship between temperature sensitivity and SOC stability upon which significant improvements in predictive models could be based. © 2013 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62016
Appears in Collections:影响、适应和脆弱性

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作者单位: Bioemco laboratory, UPMC, CNRS, INRA, AgroParisTech, Campus Grignon, Thiverval-Grignon, 78850, France; Laboratoire de Géologie, CNRS-ENS, 24 rue Lhomond, Paris, 75005, France; Department of Agroecology, Aarhus University, AU-Foulum, Tjele, DK-8830, Denmark; Direction Productions et Energies Durables - Service Agriculture et Forêt, ADEME, Angers, 49000, France; EGC laboratory, UMR INRA-AgroParisTech, Campus Grignon, Thiverval-Grignon, 78850, France; Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, 75007, Sweden; Pessac laboratory, INRA, Versailles, 78026, France

Recommended Citation:
Lefèvre R.,Barré P.,Moyano F.E.,et al. Higher temperature sensitivity for stable than for labile soil organic carbon - Evidence from incubations of long-term bare fallow soils[J]. Global Change Biology,2014-01-01,20(2)
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