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Simplified measurement-based simulation model of soil-plant phosphorus cycles in long-term agro-systems

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOLLIER, Alain
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorLI, Haixiao
hal.structure.identifierQuebec Research and Development Centre
dc.contributor.authorZIADI, Noura
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOREL, Christian
dc.date.accessioned2024-04-08T12:09:58Z
dc.date.available2024-04-08T12:09:58Z
dc.date.issued2016
dc.date.conference2016-11-06
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196600
dc.description.abstractEnActual phosphorus models are created in conventional tillage system. In addition, most simulation models are process-based, which need mathematical descriptions of fundamental physio-chemical mechanisms. The small time-step e.g. daily might not fit long-term simulation. In this study, a P model based on measured data was created to simulate the evolution of soil P status along soil profile in long-term. In P model, a soil zone was divided into 30 grids according to vertical (0-5, 5-10, 10-20, 20-30 and 30-40 cm) and lateral (0-10, 10-20 and 20-30 cm for two sides into inter-row) coordinates. For each grid, P stock was defined as total amount of phosphate ions in solid and liquid phases. The P inputs and P outputs of each grid such as fertilizer, uptake, runoff and leaching were estimated with measured data in every time-step (yearly). The P status (phosphate ion concentration in soil solution) was calculated from P stock and P budget in each time step. The simulation was conducted with two tillage systems [moldboard plough (MP) and no-till (NT)].The P model managed to simulate the evolution of P status along soil profile in MP and NT during 25 years; while it was a homogenous distribution of soil P within 0-20 cm in MP. The simulated results indicated that higher accumulation of soil P in upper layers might lead to a lower use of soil P stocked in sub-soil by crop uptake. However, the model still needs validation and adjustment of parameters to form more accurate results.
dc.language.isoen
dc.subjectanalyse de sol
dc.subjectphosphore
dc.subjectfertilisation
dc.subject.ensoil analysis
dc.subject.enphosphorus
dc.subject.enfertilization
dc.title.enSimplified measurement-based simulation model of soil-plant phosphorus cycles in long-term agro-systems
dc.typeCommunication dans un congrès
dc.subject.halSciences du Vivant [q-bio]
bordeaux.pagenp
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.titleMeeting of working Group Medicago sativa
bordeaux.countryUS
bordeaux.conference.cityPhoenix
bordeaux.peerReviewedoui
hal.identifierhal-01603652
hal.version1
hal.invitednon
hal.proceedingsoui
hal.conference.organizerAmerican Society of Agronomy (ASA). USA.
hal.conference.end2016-11-09
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01603652v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2016&rft.spage=np&rft.epage=np&rft.au=MOLLIER,%20Alain&LI,%20Haixiao&ZIADI,%20Noura&MOREL,%20Christian&rft.genre=unknown


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