Abstract

DIAZ FRANCO, Arturo; MAGALLANES ESTALA, Agustín; AGUADO SANTACRUZ, Armando  and  HERNANDEZ MENDOZA, José Luis. Soybean response to microbial inoculants in northern Tamaulipas, Mexico. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.2, pp.227-238. ISSN 2007-0934.

In order to know the response of soybean var. 'Vernal' to the effectiveness of microbial inoculants, studies were conducted in the greenhouse, field and validation. Greenhouse eight microorganisms in sterile soil, where increased stem diameter, root biomass and pod number was obtained with the independent or combined inoculation rhizobacteria Bradyrhizobium japonicum [Cell-Tech® (CT)] and the mycorrhizal fungus Rhizophagus intraradices [mycorrhiza INIFAP (MI)]. In a field experiment CT, MI, CT+MI, CT+MI+18-46-00, and absolute control were evaluated. The highest number of nodules per plant was recorded with co-inoculation of CT+MI. CT+MI with or without inorganic fertilization the highest biomass, number of pods per plant grain weight and grain yield was also obtained. In the validation study with additional mechanized planting CT, MI, CT+ MI and control in fertilized soil (18-46-00) or not measured. The results indicated that the highest yields were recorded with CT+MI co-inoculation with or without inorganic fertilization. Although economic analysis showed that the higher profitability of soybean production was co-inoculation with non-fertilized soil. The synergistic effect of co-inoculation with CT+MI represents a biotechnological alternative that serves a need for sustainable management of soybeans.

Keywords : Glycine max; endomycorrhiza; rhizobacteria.

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