%0 Journal Article
%T Impact of 60 Years of Intensive Rice Cropping on Clay Minerals in Soils Due to Si Exportation
%J -
%D 2017
%X 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 Rh£¿ne 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.
%K Clays
%K Crystallinity
%K Rice
%K Silicon
%U http://www.sciencepublishinggroup.com/journal/paperinfo?journalid=218&doi=10.11648/j.ajaf.20170503.12