Impact of 60 Years of Intensive Rice Cropping on Clay Minerals in Soils Due to Si Exportation

Kamran Irfan 1 Fabienne Trolard 1 Tanvir Shahzad 2 Lise Cary 3 Jean-Claude Mouret 4 Guilhem Bourrié 1
1 EMMAH - Environnement Méditerranéen et Modélisation des Agro-Hydrosystèmes
2 University of Faisalabad
3 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
4 UMR Innovation - Innovation et Développement dans l'Agriculture et l'Alimentation
Abstract : Rice is cultivated as staple for over half of the World's population. In Camargue (South of France) rice fields have been established on very young soils developed from historic fluvial deposits of the Rhône River. The comparison of clay mineralogy in a paddy field cultivated for 60 years and in a control shows a significant increase of the clay crystallinity in the paddy field soil, which implies a decrease of their solubility. In the paddy soils, phytoliths, poorly crystallized clays, such as smectite and to a lesser extent kaolinite, are progressively dissolved to supply Si for rice requirements. The sustainability of the crop system requires the clearing of silica exportations.
Keywords : Clays Crystallinity Rice Silicon
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Soumis le : mercredi 19 avril 2017 - 11:41:47
Dernière modification le : vendredi 29 mars 2019 - 09:12:09

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BRGM | INRA | AGROPOLIS | CIRAD | UNIV-AVIGNON

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Kamran Irfan, Fabienne Trolard, Tanvir Shahzad, Lise Cary, Jean-Claude Mouret, et al.. Impact of 60 Years of Intensive Rice Cropping on Clay Minerals in Soils Due to Si Exportation. American Journal of Agriculture and Forestry, Science Publishing Group, 2017, 5 (3), pp.40-48. ⟨10.11648/j.ajaf.20170503.12⟩. ⟨hal-01510242⟩

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