Doses de nitrogênio e aplicação de inoculante na produção de forragem e grãos de aveia preta

Abstract

The use of inoculants can cut costs with nitrogen fertilization, which can be provide by the fixation of nitrogen by plants. So, this research aimed to evaluate the influence of nitrogen levels and seed inoculation with Azospirillum brasilense on the production of dry matter and grain of black oat submitted to cuts. Experimental design was completely randomized with eight treatments and three replicates, using a 4 x 2 factorial arrangement (four N levels - 0, 50, 100 and 150 kg / ha) and application or non-application of inoculant). The parameters evaluated were forage mass, structural composition of the pasture, forage and grains production. Forage production was positively affected by inoculation with Azospirillum brasilense, providing superior results without the use of nitrogen fertilizer, as well as the leaf / stem ratio, showing compensation for low levels of nitrogen. Grain yield was influenced by both nitrogen levels and by inoculation with Azospirillum brasilense, thereby raising production at high levels of nitrogen. The mass and the forage were also benefited by inoculation with Azospirillum brasilense.