Performance of polymer compositions as carrier to cowpea rhizobial inoculant formulations: Survival of rhizobia in pre-inoculated seeds and field efficiency.

Rhizobial-legume association is a symbiosis that is exploited in agriculture by inoculant production. Efficient inoculant formulations are needed to increase the biological nitrogen fixation rates in agroecosystems. The aim of this work was to evaluate inoculant formulations to cowpea (Vigna unguiculata L. Walp) containing polymers as carrier materials and rhizobial strains. To assess the efficiency of the new inoculants formulations, the rhizobial survival in inoculated and stored seeds and the field performance of a selected formulation were evaluated. The rhizobial survival was higher in cowpea seeds inoculated with MgO compatibilized polymeric formulations, compared to standard peat-based inoculant and compatibilized polymeric formulations compatibilized with ZnO. Seeds inoculated with IPC 2.2 formulation presented more than 106 cells per seed through 35 days of storage with low contamination levels. The field performance of the polymeric compositions was the same as that observed in the peat-based inoculant treatments. Among the three rhizobial strains isolated, two of them were able to provide the same shoot nitrogen content and productivity in comparison to the recommended strain. These results indicate the feasibility of inoculants with the polymer blends as carrier materials and the efficiency of the new fast growing rhizobia from Brazilian semi-arid.

Bibliographic Details

Main Authors:	FERNANDES JUNIOR, P. I., SILVA JÚNIOR, E. B. da, SILVA JÚNIOR, S. da, SANTOS, C. E. R. da S. e, OLIVEIRA, P. J. de, RUMJANEK, N. G., XAVIER, G. R., MARTINS, L. M. V.
Other Authors:	PAULO IVAN FERNANDES JUNIOR, CPATSA; ELSON BARBOSA DA SILVA JÚNIOR, Universidade Federal Rural do Rio de Janeiro, Instituto de Agronomia; SEBASTIÃO DA SILVA JÚNIOR, Universidade Federal Rural de Pernambuco, Departamento de Agronomia; CAROLINA ETIENNE ROS.
Format:	Separatas biblioteca
Language:	English eng
Published:	2012-08-09
Subjects:	Tecnologia de inoculante, Seleção de estirpes, Fixação biológica de nitrogênio., Vigna Unguiculata.,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/930857
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