Modelling the Organic Evolution of a Mediterranean Limestone Soil under Usual Cropping of Durum Wheat and Faba Bean
The modeling of carbon (C) and nitrogen (N) fluxes between microorganisms and plants in pure and associated cultures of durum wheat and faba bean demonstrated a close link between the C and N cycles in agroecosystems. The MOMOS (microorganisms and organic matter of soils) model integrates simplified...
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MDPI AG
2021-08-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/9/1688 |
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| author | Hatem Ibrahim Sinda Gaieb Nadhem Brahim Didier Blavet Karel Van den Meersche Marc Pansu |
| author_facet | Hatem Ibrahim Sinda Gaieb Nadhem Brahim Didier Blavet Karel Van den Meersche Marc Pansu |
| author_sort | Hatem Ibrahim |
| collection | DOAJ |
| description | The modeling of carbon (C) and nitrogen (N) fluxes between microorganisms and plants in pure and associated cultures of durum wheat and faba bean demonstrated a close link between the C and N cycles in agroecosystems. The MOMOS (microorganisms and organic matter of soils) model integrates simplified descriptions of photosynthesis (origin of organic C in soil), N microbial exchange (soil origin for N), N fixation (atmospheric origin for N), and plant growth with an organic matter decomposition core that has the soil microbial community at its center. This work provides estimates of the exchange parameters between plant organs and microbes, which were compared to literature data when available. In a connection with photosynthesized C, the root demand for inorganic N can be adjusted by its microbial production. Our approach is a new methodology for improving plant production, by optimizing the interactions with soil microorganisms. Additionally, the coupling of plant growth and microbial processes enabled determining changes of the organic compartments of soil. In the unfertilized limestone soil of this study, sequestration was found to be located in the labile microbial metabolites for one year, then significantly transferred to stable humus during 6-year intercropping. Thus, we propose the MOMOS mathematical tool, not only for guiding ecological intensification, but also related to the management of agroecosystems for climate change mitigation. |
| first_indexed | 2024-03-10T07:59:01Z |
| format | Article |
| id | doaj.art-5acff54b804c43a78de026c3facb7107 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T07:59:01Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-5acff54b804c43a78de026c3facb71072023-11-22T11:36:46ZengMDPI AGAgronomy2073-43952021-08-01119168810.3390/agronomy11091688Modelling the Organic Evolution of a Mediterranean Limestone Soil under Usual Cropping of Durum Wheat and Faba BeanHatem Ibrahim0Sinda Gaieb1Nadhem Brahim2Didier Blavet3Karel Van den Meersche4Marc Pansu5Faculty of Sciences of Bizerte, University of Carthage, Jarzouna 7021, TunisiaFaculty of Sciences of Tunis, University of Tunis El Manar, Tunis 2092, TunisiaFaculty of Sciences of Tunis, University of Tunis El Manar, Tunis 2092, TunisiaIRD, UMR Eco&sols, Supagro-CIRAD-INRA-IRD University of Montpellier, CEDEX 02, 34060 Montpellier, FranceCIRAD, UMR Eco&sols, Supagro-CIRAD-INRA-IRD University of Montpellier, CEDEX 02, 34060 Montpellier, FranceIRD, UMR Eco&sols, Supagro-CIRAD-INRA-IRD University of Montpellier, CEDEX 02, 34060 Montpellier, FranceThe modeling of carbon (C) and nitrogen (N) fluxes between microorganisms and plants in pure and associated cultures of durum wheat and faba bean demonstrated a close link between the C and N cycles in agroecosystems. The MOMOS (microorganisms and organic matter of soils) model integrates simplified descriptions of photosynthesis (origin of organic C in soil), N microbial exchange (soil origin for N), N fixation (atmospheric origin for N), and plant growth with an organic matter decomposition core that has the soil microbial community at its center. This work provides estimates of the exchange parameters between plant organs and microbes, which were compared to literature data when available. In a connection with photosynthesized C, the root demand for inorganic N can be adjusted by its microbial production. Our approach is a new methodology for improving plant production, by optimizing the interactions with soil microorganisms. Additionally, the coupling of plant growth and microbial processes enabled determining changes of the organic compartments of soil. In the unfertilized limestone soil of this study, sequestration was found to be located in the labile microbial metabolites for one year, then significantly transferred to stable humus during 6-year intercropping. Thus, we propose the MOMOS mathematical tool, not only for guiding ecological intensification, but also related to the management of agroecosystems for climate change mitigation.https://www.mdpi.com/2073-4395/11/9/1688carbon cyclenitrogen cyclemodelingMOMOS modelC sequestrationclimate change |
| spellingShingle | Hatem Ibrahim Sinda Gaieb Nadhem Brahim Didier Blavet Karel Van den Meersche Marc Pansu Modelling the Organic Evolution of a Mediterranean Limestone Soil under Usual Cropping of Durum Wheat and Faba Bean Agronomy carbon cycle nitrogen cycle modeling MOMOS model C sequestration climate change |
| title | Modelling the Organic Evolution of a Mediterranean Limestone Soil under Usual Cropping of Durum Wheat and Faba Bean |
| title_full | Modelling the Organic Evolution of a Mediterranean Limestone Soil under Usual Cropping of Durum Wheat and Faba Bean |
| title_fullStr | Modelling the Organic Evolution of a Mediterranean Limestone Soil under Usual Cropping of Durum Wheat and Faba Bean |
| title_full_unstemmed | Modelling the Organic Evolution of a Mediterranean Limestone Soil under Usual Cropping of Durum Wheat and Faba Bean |
| title_short | Modelling the Organic Evolution of a Mediterranean Limestone Soil under Usual Cropping of Durum Wheat and Faba Bean |
| title_sort | modelling the organic evolution of a mediterranean limestone soil under usual cropping of durum wheat and faba bean |
| topic | carbon cycle nitrogen cycle modeling MOMOS model C sequestration climate change |
| url | https://www.mdpi.com/2073-4395/11/9/1688 |
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