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Phosphorus availability of a French thermally conditioned sewage sludge assessed by isotopic labeling techniques

hal.structure.identifierLaboratoire des Radio Isotopes [LRI]
dc.contributor.authorANDRIAMANANJARA, Andry
hal.structure.identifierLaboratoire des Radio Isotopes [LRI]
dc.contributor.authorRABEHARISOA, Lilia
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorPRUD'HOMME, Loïc
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorMOREL, Christian
dc.date.accessioned2024-04-08T11:55:56Z
dc.date.available2024-04-08T11:55:56Z
dc.date.issued2014
dc.date.conference2014-09-01
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195720
dc.description.abstractEnPhosphorus in urban sewage sludge is a potential source of P for agriculture if it is plant-available. In that case it could be an alternative to mineral P fertilizers known as non renewable source. However, to manage TCSS it is necessary to have an accurate assessment of its P fertilizing value. This work aimed to assess and compare the plant availability of P in TCSS and triple superphosphate (TSP). A pot experiment with a mixture of ryegrass and fescue was carried out for 2 months on a P-deficient and slightly acidic soil in which 50 mgP.kg–1 was applied as TSP and TCSS. The 32P–labeling of soil P was used to accurately quantify the P taken up by plants from the different P sources and to evaluate interactions after applying P-TCSS on P taken up from soil. In parallel, soil incubations were conducted on the same treatments to analyze soil respiration and soil microbial dynamics. In comparison to the control (no P applied), shoot and root biomass productions, and plant P nutrition increased with TSP and TCSS application. The contribution of TCSS and TSP to plant nutrition was 55.2% and 55.7%, respectively and the relative agronomic effectiveness of TCSS was 64%. This decrease is explained by the carbon associated with the 50 mgP.kg-1 applied to soil. This carbon initiates a priming-effect with a high microbial activity marked by high soil respiration and high P content in microbial biomass which competed for plant-available P and delayed the root and shoot growth. As a consequence, P taken up from soil and TCSS decreased both. In conclusion, this study shows that it is possible to substitute TSP by TCSS.
dc.language.isoen
dc.title.enPhosphorus availability of a French thermally conditioned sewage sludge assessed by isotopic labeling techniques
dc.typeAutre communication scientifique (congrès sans actes - poster - séminaire...)
dc.subject.halSciences de l'environnement/Environnement et Société
dc.subject.halSciences du Vivant [q-bio]/Sciences agricoles
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.conference.title4th Sustainable Phosphorus Summit SPS 2014
bordeaux.countryFR
bordeaux.conference.cityMontpellier
bordeaux.peerReviewedoui
hal.identifierhal-02793930
hal.version1
hal.invitednon
hal.conference.end2014-09-03
hal.popularnon
hal.audienceNationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02793930v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2014&rft.au=ANDRIAMANANJARA,%20Andry&RABEHARISOA,%20Lilia&PRUD'HOMME,%20Lo%C3%AFc&MOREL,%20Christian&rft.genre=conference


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