Razakatiana A. T. E. auteur aut IRD Becquer Thierry auteur aut IRD Randriambanona H. auteur aut IRD Baohanta R. H. auteur aut IRD Andrianandrasana M. D. auteur aut IRD Le Roux C. auteur aut IRD Duponnois Robin auteur aut IRD Ramanankierana H. auteur aut IRD text journalArticle eng text/pdf born digital access 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. specialized bean co-culture inoculum microbial symbionts upland rice MADAGASCAR 076 074 084 63 1 490-499 2020 2285-5785 https://www.documentation.ird.fr/hor/fdi:010079996 2285-5785 [F B010079996] https://www.documentation.ird.fr/hor/fdi:010079996 https://www.documentation.ird.fr/intranet/publi/2020/12/010079996.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2021-01-14 2021-01-14 fdi:010079996 fre