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United States Department of Agriculture

Agricultural Research Service

Title: Role of Clay Minerals on Soil Organic Matter Formation and Stabilization

item Gonzalez, Javier
item Laird, David

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: June 1, 2005
Publication Date: June 15, 2005
Citation: Gonzalez, J.M., Laird, D.A. 2005. Role of clay minerals on soil organic matter formation and stabilization. In: Abstracts of the EMSI/North Central NOM Workshop, The Ohio State University, Columbus, OH, June 15-17.

Technical Abstract: The Maillard reaction, as an alternative theory for soil organic matter (SOM) formation, has not been investigated under conditions relevant for SOM formation. This research was conducted to investigate the distribution of newly formed humic materials into mineralogical distinct clay-size fractions and to investigate whether smectites catalyze the Maillard reaction and the transformation of glucose to form humic-like compounds under abiotic conditions. Glucose dehydration was affected by the type of saturating cation on the clay; Al3+ enhanced monosaccharide dehydration whereas Fe3+ inhibited monosaccharide dehydration. The transformation products in the systems (sorbed C + N) are believed to be co-polymerization products of furfural compounds and levulinic acid and amino containing compounds. This research demonstrates that Maillard reactions may be a major pathway for the incorporation of new C and N into SOM and for the formation of new humic substances.

Last Modified: 5/5/2015
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