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Évaluation de la disponibilité et la gestion du phosphore dans les agrosystèmes : avancées scientifiques et techniques

Abstract : The crop phosphorus nutrition management is a challenging issue in agriculture. The objective of this paper is to illustrate how the scientific progresses on the analysis of the biogeochemical P cycle in agrosystems make it possible to renew the P fertilisation recommendations and practices by identifying, quantifying and ranking the main processes that govern the soil-plant P transfer. Two new mechanistic-based indicators, the concentration of phosphate ion in soil solution and the transfer of diffusible phosphate ions at the solid-to-solution interface make it possible to assess the soil P availability. These new soil P availability indicators improve the diagnosis of crop P response by taking account mechanistically of the soil type effects on the definition of thresholds for P fertilisation management. The recent development of mechanistic models of biogeochemical of P cycle based on these two indicators of soil P availability allows to predict crop P uptake and the soil P availability dynamic on short and long term. Such models are useful to develop and test innovative P fertilisation strategies to improve P acquisition and utilisation efficiencies.
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Submitted on : Tuesday, May 26, 2020 - 12:47:21 PM
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  • HAL Id : hal-02624871, version 1



Alain Mollier, Pascal Denoroy, Christian Morel. Évaluation de la disponibilité et la gestion du phosphore dans les agrosystèmes : avancées scientifiques et techniques. Agronomie, Environnement & Sociétés, Association Française d'Agronomie (Afa), 2019, 9 (1), pp.87-98. ⟨hal-02624871⟩



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