Skip to Main Content
Book Chapter

Clay-Size Organo-Mineral Complexes in Temperate Soils: Relative Contributions of Sorptive and Physical Protection

By
C. Chenu
C. Chenu
AgroParis Tech, Laboratory BIOEMCO, 78850 Grignon, France E-mail: Claire Chenu chenu@grignon.inra.fr
Search for other works by this author on:
I. Virto
I. Virto
AgroParis Tech, Laboratory BIOEMCO, 78850 Grignon, France E-mail: Claire Chenu chenu@grignon.inra.fr
Search for other works by this author on:
A. Plante
A. Plante
Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA USA E-mail: aplante@sas.upenn.edu
Search for other works by this author on:
F. Elsass
F. Elsass
INRA Pessac, 78026 Versailles France E-mail: elsass@versailles.inra.fr
Search for other works by this author on:
Published:
January 01, 2009

Abstract

Soils contain the largest C pool at the surface of the continents with more than 1500 Gt C (IPCC 2001). Managing soil C has been proposed as a way to reduce the increase of CO2 concentration in the atmosphere. However, choosing the best management option requires an appropriate knowledge of the mechanisms responsible for organic matter stabilization in soils in the long term.

Several processes can explain the stabilization of organic matter in soils (Figure 1), including (i) the selective preservation of recalcitrant molecules, (ii) chemical stabilization, which involves all intermolecular interactions between organic substances and inorganic ones leading to a decrease in availability of the organic matter, i.e. surface adsorption and precipitation and (iii) physical stabilization that is related to the decrease in the accessibility of organic substrates to micro-organisms due to occlusion in small pores (Sollins et al., 1996; Baldock and Skjemstad, 2000).

One of the major controls of soil C stocks is soil texture. Indeed, clayey soils are generally richer in C than coarser-textured soils, and several authors have established correlations between soil texture and C contents. For example, Hassink et al. (1997), Feller and Beare (1997) and later (Six et al., 2002) showed that the amount of C stored in the silt + clay fraction of soil (i.e. < 20μm particle size or < 50μm particle size) increased with the abundance of this fraction. Keil et al. (1994) and Mayer (1994)

You do not currently have access to this article.

Figures & Tables

Contents

Clay Minerals Society Workshop Lectures 16

Carbon Stabilization by Clays in the Environment: Process and Characterization Methods

David A. Laird
David A. Laird
USDA, ARS, National Soil Tilth Laboratory 2110 University Blvd Ames IA 50011-3120 USA
Search for other works by this author on:
Javiera Cervini Silva
Javiera Cervini Silva
Instituto de Geografia Universidad Nacional Autónoma de México Ciudad Universitaria, Mexico City
Search for other works by this author on:
Yona Chen
Yona Chen
The Hebrew University of Jerusalem, Israel
Search for other works by this author on:
Claire Chenu
Claire Chenu
CNRS-UPMC-INRA-AgroParisTech-ENS-ENPC, Grignon, France
Search for other works by this author on:
Françoise Elsass
Françoise Elsass
Centre de Géochimie de la Surface, Strasbourg, France
Search for other works by this author on:
Javier M. Gonzalez
Javier M. Gonzalez
USDA, ARS, NAA, AFSRC, Beaver, WV, USA
Search for other works by this author on:
Michael H.B. Hayes
Michael H.B. Hayes
University of Limerick, Ireland
Search for other works by this author on:
David A. Laird
David A. Laird
USDA, ARS, NSTL, Ames, IA, USA
Search for other works by this author on:
Alain Plante
Alain Plante
University of Pennsylvania, Philadelphia, PA, USA
Search for other works by this author on:
Andre J. Simpson
Andre J. Simpson
University of Toronto at Scarborough, Canada
Search for other works by this author on:
Guixue Song
Guixue Song
University of Limerick, Ireland
Search for other works by this author on:
Jorge Tarcjotzly
Jorge Tarcjotzly
The Hebrew University of Jerusalem
Search for other works by this author on:
Michael L. Thompson
Michael L. Thompson
Iowa State University, Ames IA, USA
Search for other works by this author on:
I. Virto
I. Virto
CNRS-UPMC-INRA-AgroParisTech-ENS-ENPC, Grignon, France
Search for other works by this author on:
Robert L. Wershaw
Robert L. Wershaw
U.S. Geological Survey, Denver, CO, USA
Search for other works by this author on:
Clay Minerals Society
ISBN electronic:
9781881208365
Publication date:
January 01, 2009

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal