Biological nitrogen fixation (FBN) is presented as a viable and sustainable in
the production of grasses, through the use of bacterium of the genus Azospirillum,
microorganisms potential plant growth promoter. In this sense, the present work was to study
the effect of using the diazotrophic bacterium Azospirillum brasilense, inoculated in seeds, in
association or not with nitrogen, in the off season, the content and oil yield in corn genotypes.
The tests were performed at two sowing times in a randomized complete block design (DBC)
with 30 treatments and three replications. In every age, the treatments were arranged in a
factorial 2x3x5, represented by two seed inoculation processes (with and without seed
inoculation) Three genotypes (Orion and Al Bandeirante, open-pollinated varieties, and the
Hybrid Double (AG-1051) and five doses of nitrogen N (0, 50, 100, 150 and 200 kg ha-1) held
in coverage. The grain oil content were evaluated (%) and oil yield (kg ha-1). individual
variance analysis was performed and subsequently pooled analysis. The use of bacterium
Azospirillum brasilense, with or without nitrogen, promoted an increase in content and oil
yield in grains. The variety Orion was the one that stood out when inoculated with
Azospirillum bacterium, and is the most efficient when grown under low nitrogen. The
adoption of this practice does not replace the use of nitrogen fertilizers, but can be an
alternative to reduce producer costs.
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