Maize for acid soils. First scientific report - 2001 : INCO2 contract No ICA4-CT-2000-30017
The objectives for the first year of the work package 10 were to write and calibrate a model of Al and P dynamics in the rhizosphere. The Rhizodyn model, developed within the preceding European program "Fitting maize for acid soil", was supplemented (i) for its use on Windows 2000/NT environment, (ii) with a module of adsorption for the anions (phosphate and organic anions), and (iii) with a thermodynamic data base including the constants of formation of the complexes between anions and Al and Fe. In parallel, the model was calibrated for the P adsorption in using isothermal and kinetic studies highlighting the effect of the pH on the fixing of P. An experimental study was done with a soil of Colombia using a special culture device, making possible to conveniently analyse the rhizosphere soil. This work allowed a detailed study of the interactions between H, Al and P in the rhizosphere. It will allow later the validation of the model and the study of sensitivity of the parameters.
| Main Authors: | , , , |
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| Format: | monograph biblioteca |
| Language: | eng |
| Published: |
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| Subjects: | P33 - Chimie et physique du sol, P35 - Fertilité du sol, Zea mays, sol acide, modèle de simulation, aluminium, phosphate, fer, rhizosphère, pH du sol, échange d'ion, http://aims.fao.org/aos/agrovoc/c_8504, http://aims.fao.org/aos/agrovoc/c_89, http://aims.fao.org/aos/agrovoc/c_24242, http://aims.fao.org/aos/agrovoc/c_317, http://aims.fao.org/aos/agrovoc/c_35986, http://aims.fao.org/aos/agrovoc/c_3950, http://aims.fao.org/aos/agrovoc/c_6569, http://aims.fao.org/aos/agrovoc/c_34901, http://aims.fao.org/aos/agrovoc/c_3933, http://aims.fao.org/aos/agrovoc/c_1767, |
| Online Access: | http://agritrop.cirad.fr/528368/ http://agritrop.cirad.fr/528368/1/document_528368.pdf |
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