Development and field evaluation of liquid inoculants with native Bradyrhizobial strains for peanut production

VALETTI, L; ANGELINI, JG; TAURIAN, T; IBÁÑEZ, FJ; MUÑOZ, VL; ANZUAY, MS; LUDUEÑA, LM; FABRA, A

The African Crop Science

The African Crop Science Journal

Lugar: Uganda; Año: 2016 vol. 24 p. 1 - 13

1021-9730

A critical process in the leguminous crops cycles is biological nitrogen fixation (BNF). Application of inoculantswith N fixing bacteria is economically and environmentally favourable. The aim of this work was to selectcompetitive native peanut microsymbionts, evaluate their survival in inoculant support and assess their impacton peanut (Arachis hypogaea L.) production under field conditions at Córdoba province in Argentina. Theefficient N fixing Bradyrhizobium sp. J-81 and Bradyrhizobium sp. J-237, previously obtained from peanutnodules in the region of Cordoba, Argentina, were evaluated. In microcosm assays, plants inoculated with theseisolates demonstrated better symbiotic parameters than those inoculated with reference strains. Different bacterialgrowth media and inoculant stabiliser solutions were evaluated. Balanced medium and arabic gum stabilisingsolution had optimal bacterial growth and the highest bacterial concentration and viability, respectively. Inoculationwith either inoculants resulted in 44% greater peanut pod yield at Pizarro compared to the non-inoculated plants,although no significant differences were found with respect to commercial inoculants treatments.