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Stoichiometry constraints challenge the potential of agroecological practices for the soil C storage. A review

hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
dc.contributor.authorBERTRAND, Isabelle
hal.structure.identifierSol Agro et hydrosystème Spatialisation [SAS]
dc.contributor.authorVIAUD, Valérie
hal.structure.identifierEcologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
dc.contributor.authorDAUFRESNE, Tanguy
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorPELLERIN, Sylvain
hal.structure.identifierFractionnement des AgroRessources et Environnement [FARE]
dc.contributor.authorRECOUS, Sylvie
dc.date.accessioned2024-04-08T12:05:20Z
dc.date.available2024-04-08T12:05:20Z
dc.date.issued2019
dc.identifier.issn1774-0746
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196351
dc.description.abstractEnTo date, the stoichiometry concept has been poorly used to explore C, N, and P cycles in agroecosystems. As agriculture is now under pressure to reduce the use of synthetic inputs, ecological processes and alternative agricultural practices will become the main regulators of the relationships between C, N, and P and thereby of nutrient availability and C storage in soils. In this paper, we review the ecological theories underpinning the concepts of homeostasis and stoichiometric flexibility, their application to agroecosystems, and how stoichiometry could constraint agroecological practices related to nutrient availability and soil C storage. Our main findings are (1) optimal C:N:P ratios exist at the species level, reflecting a range of ecological strategies and representing a keystone constraint for the coupling of C, N, and P cycles, resulting in canonical ratios at the community level. Stoichiometric flexibility nevertheless exists from the organism level-autotrophs having higher flexibility than heterotrophs-to the community level, depending on assembly rules. (2) Agroecosystems are stoichiometrically constrained especially in the soil compartment, due to the low stoichiometric flexibility of microorganisms at the community level. (3) Agricultural practices such as fertilization decrease N:P ratios in soil surface when total P is considered, while C:N ratios remained constant. (4) Stoichiometry homeostasis constraints for soil C storage require the availability of N and P. They can be supported by agroecological practices that promote nutrient recycling (organic fertilization, permanent soil cover, N fixation). The 45-Tg N and 4.8-Tg P needed to increase the C stock of cropped soils by "4 per mille per year" can be also provided by suppressing nutrient losses. We conclude that two soil compartments should be more investigated to evaluate their potential to bypass stoichiometric constraints and foster C storage while reducing chemical inputs: deep soil horizons and particulate organic matter fraction.
dc.language.isoen
dc.publisherSpringer Verlag/EDP Sciences/INRA
dc.rights.urihttp://hal.archives-ouvertes.fr/licences/copyright/
dc.subject.enagricultural soils
dc.subject.encarbon
dc.subject.ennitrogen
dc.subject.enphosphorus
dc.subject.enorganic matter
dc.subject.enplant
dc.subject.enstochiometry
dc.title.enStoichiometry constraints challenge the potential of agroecological practices for the soil C storage. A review
dc.typeArticle de revue
dc.typeArticle de synthèse
dc.identifier.doi10.1007/s13593-019-0599-6
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalAgronomy for Sustainable Development
bordeaux.page54
bordeaux.volume39
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue6
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02394655
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02394655v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Agronomy%20for%20Sustainable%20Development&rft.date=2019&rft.volume=39&rft.issue=6&rft.spage=54&rft.epage=54&rft.eissn=1774-0746&rft.issn=1774-0746&rft.au=BERTRAND,%20Isabelle&VIAUD,%20Val%C3%A9rie&DAUFRESNE,%20Tanguy&PELLERIN,%20Sylvain&RECOUS,%20Sylvie&rft.genre=article&unknown


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