Desempenho agronômico do sorgo granífero em função de inoculação com Azospirillum brasilense e doses de nitrogênio em cobertura.

Abstract

The objective of this paper was to evaluate the effect of applying different doses of nitrogen associated with the presence and absence of inoculation of sorghum seed with Azospirillum brasilense. The experiment was conducted in pots (20 cm x 24cm x 27cm), on Campus 2 of PUC Goiás. The design used was in randomized blocks (DBC), with 5 treatments and 3 replications: T0 (control); T1 (89.00 kg ha-1 of nitrogen with seed inoculation); T2 (133.00 kg ha-1 of nitrogen with seed inoculation); T3 (178 kg ha-1 of nitrogen) and T4 only seed inoculation was carried out at sowing. The following variables were evaluated: plant height (AP), panicle size (TP), stem diameter (DC), number of leaves (NF), panicle weight (PP) and weight of one hundred grains (PCG), the data were subjected to analysis of variance associated with the Tukey test at 5% probability, using the SISVAR statistical program. It was possible to conclude that the inoculation of sorghum seeds with growth-promoting bacteria enabled better development of the plant, being able to replace nitrogen fertilization, reducing production costs and providing a harvest with the use of biological products aiming to reduce the use of chemical fertilizers on farm.