Near infrared reflectance spectroscopy applied to model the transformation of added organic materials in soil

Kaboré Théodore W., Pansu Marc Antoine, Hien Edmond, Brunet Didier, Barthès Bernard, Houot Sabine, Coulibaly Aboubacar, Zombré Prosper, Thuriès Laurent, Masse Dominique. 2012. Near infrared reflectance spectroscopy applied to model the transformation of added organic materials in soil. Journal of Near Infrared Spectroscopy, 20 (3) : 339-351.

Quartile : Q2, Sujet : CHEMISTRY, APPLIED / Quartile : Q3, Sujet : SPECTROSCOPY

Résumé : Raw, mixed and composted organic materials (OM) from agricultural and urban wastes were subjected to biochemical analyses, near infrared (NIR) reflectance spectroscopy and laboratory incubations. Respiration during incubations was accurately predicted using a decomposition model [transformation of added organic materials, (TAO)] of very labile, intermediary resistant, and stable OM fractions. Calibrations using NIR spectra were developed to determine the very labile and stable fractions of OM used to predict three-month OM mineralisation in soil. This study has confirmed that OM decomposition is mainly driven by OM quality on a short-term basis. The wavelengths contributing heavily to the prediction of very labile and stable OM components and molecular functions of these fractions were identified. The resulting TAO-NIR spectroscopy model is an efficient tool to study the degradation of natural molecules and its management for plant growth and sustainability of ecosystems. As a sub-model of a more complex C cycle model, it can instantaneously simulate labile and stable fractions of various organic inputs in soil and, as a non-destructive and easily portable spectroscopic method, could be used to assess C dynamics on a regional scale.

Mots-clés Agrovoc : matière organique du sol, spectroscopie infrarouge, modèle mathématique, carbone, respiration du sol, dégradation, fertilité du sol, utilisation des déchets, déchet urbain, déchet agricole, croissance, Réflectance, séquestration du carbone

Mots-clés géographiques Agrovoc : Burkina Faso

Mots-clés complémentaires : Réflectrométrie

Classification Agris : U30 - Méthodes de recherche
P33 - Chimie et physique du sol

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Kaboré Théodore W., Université de Ouagadougou (BFA)
• Pansu Marc Antoine, IRD (FRA)
• Hien Edmond, Université de Ouagadougou (BFA)
• Brunet Didier, IRD (FRA)
• Barthès Bernard, IRD (FRA)
• Houot Sabine, INRA (FRA)
• Coulibaly Aboubacar, IRD (BFA)
• Zombré Prosper, Université de Ouagadougou (BFA)
• Thuriès Laurent, CIRAD-PERSYST-UPR Recyclage et risque (REU) ORCID: 0000-0002-1365-7891
• Masse Dominique, IRD (BFA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/564891/)

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