Modelling the continuous exchange of nitrogen between microbial decomposers, the organs and symbionts of plants, soil reserves and the atmosphere
| العنوان: | Modelling the continuous exchange of nitrogen between microbial decomposers, the organs and symbionts of plants, soil reserves and the atmosphere |
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| المؤلفون: | Hatem Ibrahim, Didier Blavet, Nadhem Brahim, Jean-Luc Chotte, Jean-Jacques Drevon, Marc Antoine Pansu, Jean-Michel Harmand, Abdessatar Hatira |
| المساهمون: | Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Université de Tunis El Manar (UTM), Agropolis Fondation of Montpellier, France (program CfP 2010-GFP), ANR-10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2010) |
| المصدر: | Soil Biology and Biochemistry Soil Biology and Biochemistry, Elsevier, 2018, 125, pp.185-196. ⟨10.1016/j.soilbio.2018.06.011⟩ |
| بيانات النشر: | HAL CCSD, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 0106 biological sciences, Microorganism, agroécologie, Nitrogen cycle, 01 natural sciences, Decomposer, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, Global change, 2. Zero hunger, biology, U10 - Informatique, mathématiques et statistiques, Intercropping, 04 agricultural and veterinary sciences, Nitrogen, Cycle de l'azote, Organic farming, N fixation, Fertilizer, Micro-organisme du sol, Fixation de l'azote, Carbone, P40 - Météorologie et climatologie, F60 - Physiologie et biochimie végétale, Soil Science, chemistry.chemical_element, engineering.material, Microbiology, N microbial exchanges, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Modélisation environnementale, Changement climatique, P34 - Biologie du sol, Mineralization (soil science), 15. Life on land, biology.organism_classification, Dégradation, chemistry, Agronomy, 13. Climate action, 040103 agronomy & agriculture, engineering, 0401 agriculture, forestry, and fisheries, Environmental science, C and N modelling, Cropping, 010606 plant biology & botany, Agro-ecology |
| الوصف: | International audience; Most of the C and N models published over past decades are based on parameters not always linked to the environment and underestimate the role of microorganisms. They are often over-parameterized, which can give multiple solutions for flow calculations between state variables. This work proposes a modelling method centred on the functioning of living organisms in order to calculate flow parameters using data on N stocks in decomposers, plant organs, symbiotic microorganisms, and the soil compartments. The model was settled via a complex N fixing and intercropping system of durum wheat/faba bean compared to the cropping of pure durum wheat and pure faba bean, all in the context of organic farming invaded by weeds and weeded by hand just before flowering. To avoid perturbation of natural exchanges of C and N, no fertilizer was added from 1997 to 2011. The equation system defined for the association of any number of plants, as well as parameters previously published for C-flow calculations were used, and only a few parameters specific to N flows were added, and are discussed. The results showed the strong link between N and C in the environment. The calculations converge toward an unique set of solutions that is consistent with literature data when available. The labile organic N of microbial origin was modelled as the main potentially available stock. Living microorganisms stored about 1% of total N, which was close to the N stock in faba bean and four times more than stock in durum wheat. Inorganic N was immobilized before flowering in competition with N requirement of durum wheat roots. Net N mineralization, mainly from decomposition of faba bean roots, started too late to improve wheat production. During the cropping period, weeds accounted for losses of 20 kg N ha−1, while the atmospheric N2 fixation of 90 kg N ha−1 was close to the total microbial immobilization. The model associating microbial and plant flows of C and N in complex plant covers, appears as a robust tool to quantify the exchanges of the earth organisms with the soil and atmosphere. It enables to propose essential recommendations to improve as well agro-ecology as predictions of global changes of C and N stocks. |
| وصف الملف: | text |
| اللغة: | English |
| تدمد: | 0038-0717 |
| DOI: | 10.1016/j.soilbio.2018.06.011⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8554b7de69ef2359b7dde7c76f68a9b https://hal.inrae.fr/hal-02620886 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....e8554b7de69ef2359b7dde7c76f68a9b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00380717 |
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| DOI: | 10.1016/j.soilbio.2018.06.011⟩ |