Journal Article

PUBDB-2015-00573

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Localization of soil organic matter in soil aggregates using synchrotron-based X-ray microtomography

Peth, S. (Corresponding Author)>Extern* ; Chenu, C.>Extern* ; Leblond, N. ; Mordhorst, A.>Extern* ; Garnier, P.>Extern* ; Nunan, N. ; Pot, V. ; Ogurreck, M.>Extern*DESY* ; Beckmann, F.>Extern*

2014
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.soilbio.2014.07.024

Abstract: Modelling carbon mineralisation in natural soils is a major topic in soil and climate research. Current models need to be improved to include soil structure as an influencing factor to better predict C fluxes between pedosphere and atmosphere and to estimate carbon sequestration potentials. Geometry-based mechanistic modelling approaches have recently been developed to systematically study the effect of soil structure on carbon decomposition. Such models require spatially explicit input parameters describing the architecture of the pore space and the heterogeneous distribution of microbes and organic matter as decomposable substrate. The latter is very difficult to determine in situ, resulting in increased uncertainty in the models. To obtain more realistic input data, we have developed a novel approach to locate soil organic matter (SOM) in undisturbed aggregates of soil using a combination of synchrotron-based X-ray microtomography and osmium as a staining agent for SOM. Here, we present the first results using 5 mm sized soil aggregate samples with contrasting C-contents in which we obtained maps of organic matter distributions in relation to the pore networks at the aggregate scale.

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Contributing Institute(s):

1. DOOR-User (DOOR)
2. Zentrum für Material- und Küstenforschung (HZG)

Research Program(s):

1. DORIS Beamline W2 (POF2-54G13) (POF2-54G13)

Experiment(s):

1. DORIS Beamline W2 (DORIS III)

Appears in the scientific report 2014

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Database coverage:
; BIOSIS Previews ; Current Contents - Agriculture, Biology and Environmental Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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