INOCULAÇÃO DE SEMENTES DE BRS ZURI COM Azospirillum

Abstract

Population growth and increasing food demand are driving the intensification of production systems. The use of more productive cultivars and technologies can contribute to enhancing these systems. The objective was to evaluate the inoculation of different doses of Azospirillum brasilense in seeds of the BRS Zuri cultivar on the agronomic performance of the plants. The experiment was conducted in two environments: (1) In a greenhouse, in a randomized block design (RBD), with 7 doses of Azospirillum brasilense and four replications, using sand as substrate; (2) In the field, also in RBD, in split plots, with 5 doses of A. brasilense and 5 doses of nitrogen, with four replications. At 44 days after sowing (DAS), the following variables were evaluated in the greenhouse: emergence, number of tillers, plant height, number of leaves, leaf width and length, root length, fresh and dry mass. In the field, at 75 DAS (days after sowing), plant height, number of tillers, and dry matter were evaluated. The data were subjected to the F-test, and the means were compared using Tukey's test, both at a 5% probability level. No significant differences were observed in either experimental condition. However, in the greenhouse, the 250 mL dose, and in the field, the 200 mL dose, showed greater increases in the analyzed variables. The use of nitrogen doses reduced the evaluated parameters. Keywords: Growth-promoting bacteria. Forage. Inoculan