Microbial symbionts and nutrient (N and P) sharing: Effect on soil microbial activity in the upland rice (Oriza sativa) and bean (Phaseolus vulgaris) intercropping

Razakatiana Adamson Tsoushima Ernest, Becquer Thierry, Randriambanona Herizo, Baohanta Rondro Harinisainana, Andrianandrasana Martial Doret, Le Roux Christine, Duponnois Robin, Ramanankierana Heriniaina. 2020. Microbial symbionts and nutrient (N and P) sharing: Effect on soil microbial activity in the upland rice (Oriza sativa) and bean (Phaseolus vulgaris) intercropping. Scientific Papers. Series A. Agronomy, 63 (1) : 490-499.

Résumé : The symbiotic association (plant-soil-microorganisms) has an important role in nitrogen (N) and phosphorus (P) uptake. The main objective of this study is to assess the potential of fungal and rhizobial symbionts as well as the importance of plant-soil-microorganism interactions on microbial dynamics. The upland rice and the beans were cultivated in mono or in co-culture using the rhizospheric soil of the upland rice and beans collected on plots treated with different levels of organic and mineral fertilizers. What about saying: Microbial (fungal and rhizobial) inoculate were constituted by root fragments (rice or bean) collected from previous crop and coded as I1 (root fragments from rice), I2 (root fragments from bean) and I3 (mixed root fragments from rice and bean). The results showed that soils inoculated with I1 and I3, were characterized by high phosphatase activity. These two treatments enhance also the amount of nitrogen and phosphorus in the aerial part of upland rice intercropped with bean. These results suggest that the bean with its symbiont can be considered as ecological engineers that stimulate the biological functioning of soils and is beneficial for upland rice cultivation.

Mots-clés Agrovoc : Oryza sativa, Phaseolus vulgaris, biologie du sol, culture intercalaire, symbiote, relation plante sol, activité biologique dans le sol, interactions biologiques, écologie microbienne, azote, phosphore

Mots-clés libres : Bean, Co-culture, Inoculum, Microbial symbionts, Upland rice

Classification Agris : F08 - Systèmes et modes de culture
P34 - Biologie du sol
P35 - Fertilité du sol

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

• Razakatiana Adamson Tsoushima Ernest, CNRE [Centre National de Recherches sur l'Environnement] (MDG)
• Becquer Thierry, IRD (FRA)
• Randriambanona Herizo, CNRE [Centre National de Recherches sur l'Environnement] (MDG)
• Baohanta Rondro Harinisainana, CNRE [Centre National de Recherches sur l'Environnement] (MDG)
• Andrianandrasana Martial Doret, CNRE [Centre National de Recherches sur l'Environnement] (MDG)
• Le Roux Christine, CIRAD-BIOS-UMR LSTM (FRA) ORCID: 0000-0003-0668-3589
• Duponnois Robin, IRD (FRA)
• Ramanankierana Heriniaina, CNRE [Centre National de Recherches sur l'Environnement] (MDG)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/597096/)

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