Estimation of sulfur mineralization and relationships with nitrogen and carbon in soils
2009
Niknahad Gharmakher, Hamid | Machet, Jean-Marie, J.-M. | Beaudoin, Nicolas, N. | Recous, Sylvie | Agrosystèmes et impacts environnementaux carbone-azote (Agro-Impact) ; Institut National de la Recherche Agronomique (INRA) | Fractionnement des AgroRessources et Environnement (FARE) ; Université de Reims Champagne-Ardenne (URCA)-Institut National de la Recherche Agronomique (INRA)
International audience
Afficher plus [+] Moins [-]anglais. A 25-week laboratory study was carried out to determine sulfur, carbon, and nitrogen mineralization rates in soil samples obtained from representative soils in France. Their relationship with some of the soil properties was investigated to find a predictor of mineralized S in soils. At 20A degrees C and 80% water-holding capacity, the S mineralization rate ranged from 0.02 to 0.16 mg kg(-1) day(-1). It was significantly positively related to soil organic C and N and to C and N mineralization rates. It was weakly related to total soil S. The results suggest that the S mineralization is predominantly driven by heterotrophic microbial activity. A predictive equation for S mineralization based on soil C content, soil pH, and clay content is proposed.
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