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Mineralization and speciation of organic phosphorus in a sandy soil continuously cropped and phosphorus-fertilized for 28 years

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierUniversité Laval [Québec] [ULaval]
dc.contributor.authorRAGUET, Pablo
hal.structure.identifierAgriculture and Agri-Food Canada, Saskatoon Research Centre
dc.contributor.authorCADE-MENUN, Barbara
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOLLIER, Alain
hal.structure.identifierAgriculture and Agri-Food Canada, Saskatoon Research Centre
dc.contributor.authorABDI, Dalel
hal.structure.identifierAgriculture and Agri-Food Canada, Saskatoon Research Centre
dc.contributor.authorZIADI, Noura
hal.structure.identifierUniversité Laval [Québec] [ULaval]
dc.contributor.authorKARAM, Antoine
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOREL, Christian
dc.date.accessioned2024-04-08T11:43:42Z
dc.date.available2024-04-08T11:43:42Z
dc.date.issued2023-03
dc.identifier.issn0038-0717
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195118
dc.description.abstractEnPhosphorus (P) is essential to plants and many crops require P fertilizers to optimize yields. However, there are concerns about future scarcity of the rock phosphates used to produce P chemical fertilizers. Soil organic phosphorus (SOP) might play a significant role in plant nutrition and soil P availability, reducing fertilizer re-quirements, but SOP mineralization is poorly understood. This study assessed rates of SOP mineralization and SOP speciation using a long-term field experiment in France, continuously cropped (1972-2000) and fertilized at three rates (triple superphosphate). The SOP concentration was determined every 2-3 years using the Saunders and Williams ignition method and converted to stock considering the soil mass per hectare; P speciation was determined using solution P nuclear magnetic resonance spectroscopy. The SOP stocks slightly increased with time, irrespective of P fertilization rates. Inorganic P stocks decreased without fertilization, but increased at the high P fertilization rate. By adapting a model describing soil organic carbon dynamics, the gross mineralization coefficient (k) was calculated with initial SOP stock (368 kg P ha- 1), P in maize residues (average of 17.0 kg P ha- 1 yr-1, differences across yields, plant parts and P fertilization rates) and their 17% incorporation rates into SOP (i.e. 2.9 kg P ha- 1 yr -1). Irrespective of P fertilization rates, the model calibration using SOP time series gave a k-value of 0.0047 yr- 1 (212 yr residence time) and a mineralization rate of 1.7 +/- 1.2 kg P ha- 1yr- 1. Speciation of SOP was 77% of orthophosphate monoesters, and 20% of orthophosphate diesters regardless of the P fertil-ization rates. The predominance of inositols hexakisphosphates, known to be strongly stabilized through sorp-tion, might explain the low SOP mineralization rate. The results for these soils suggest that SOP may only play a minor role in soil P availability and crop nutrition.
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.language.isoen
dc.publisherElsevier
dc.subject.enP-bioavailability
dc.subject.enCrop management
dc.subject.enDynamics
dc.subject.enLong-term field experiment
dc.subject.en31 P-NMR
dc.title.enMineralization and speciation of organic phosphorus in a sandy soil continuously cropped and phosphorus-fertilized for 28 years
dc.typeArticle de revue
dc.identifier.doi10.1016/j.soilbio.2022.108938
dc.subject.halSciences de l'environnement
bordeaux.journalSoil Biology and Biochemistry
bordeaux.page108938
bordeaux.volume178
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-04121053
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04121053v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Soil%20Biology%20and%20Biochemistry&rft.date=2023-03&rft.volume=178&rft.spage=108938&rft.epage=108938&rft.eissn=0038-0717&rft.issn=0038-0717&rft.au=RAGUET,%20Pablo&CADE-MENUN,%20Barbara&MOLLIER,%20Alain&ABDI,%20Dalel&ZIADI,%20Noura&rft.genre=article


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