Inoculação de milho com inoculante à base de Azospirillum brasilense sob doses de nitrogênio em solo arenoso

Diazotrophic bacteria can benefit maize, but the effectiveness of the association of these microorganisms with the plant may depend on chemical, physical and biological conditions of the soil, the environment, or even the genotype. Considering that Brazil has an expressive area of very sandy soil used for cultivation, the objective of the work was to evaluate the development of maize under sandy soil (90.3% sand) under the effect of the application of inoculant based on Azospirillum brasilense in the seeds combining with the addition of different doses of nitrogen at the time of sowing. The experiment was carried out for 40 days in pots arranged in the field in a randomized block design, 5x2 factorial scheme, with 4 replications. The soil-substrate used to compose the 14 dm3 pots came from a Entisol Quartzpsamment (Soil Taxonomy, USA). N doses equivalent to 0, 50, 100, 150, 200 kg ha-1 were applied. It was found that inoculation with Azospirillum brasilense does not affect the development of maize grown in very sandy soil and that the increase in N doses provides a linear increase in biometric, productive aspects and chlorophyll index