Details
| Original language | English |
|---|---|
| Pages (from-to) | 189-194 |
| Number of pages | 6 |
| Journal | Soil Biology and Biochemistry |
| Volume | 78 |
| Publication status | Published - Nov 2014 |
| Externally published | Yes |
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 5mm 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.
Keywords
- Carbon sequestration, Soil organic matter, Soil structure, Staining, Synchrotron microtomography
ASJC Scopus subject areas
- Immunology and Microbiology(all)
- Microbiology
- Agricultural and Biological Sciences(all)
- Soil Science
Sustainable Development Goals
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In: Soil Biology and Biochemistry, Vol. 78, 11.2014, p. 189-194.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Localization of soil organic matter in soil aggregates using synchrotron-based X-ray microtomography
AU - Peth, Stephan
AU - Chenu, Claire
AU - Leblond, Nelly
AU - Mordhorst, Anneka
AU - Garnier, Patricia
AU - Nunan, Naoise
AU - Pot, Valérie
AU - Ogurreck, Malte
AU - Beckmann, Felix
N1 - Funding Information: This research was supported by the Helmholtz-Association (contract no. I-2010-0144 ) and the german academic exchange service (DAAD : Procope 56477905 ).
PY - 2014/11
Y1 - 2014/11
N2 - 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 5mm 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.
AB - 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 5mm 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.
KW - Carbon sequestration
KW - Soil organic matter
KW - Soil structure
KW - Staining
KW - Synchrotron microtomography
UR - http://www.scopus.com/inward/record.url?scp=84907329117&partnerID=8YFLogxK
U2 - 10.1016/j.soilbio.2014.07.024
DO - 10.1016/j.soilbio.2014.07.024
M3 - Article
AN - SCOPUS:84907329117
VL - 78
SP - 189
EP - 194
JO - Soil Biology and Biochemistry
JF - Soil Biology and Biochemistry
SN - 0038-0717
ER -