Desempenho agronômico do milho em função de doses de inoculação com Azospirillum associada a diferentes modos de aplicação

Abstract

Corn is the most planted crop in the second crop after precocious soybeans. For its development, high doses of nitrogen fertilizers are required. One technology that has come to help reduce the use of nitrogen fertilizers is the inoculation of nitrogen - fixing associative bacteria, such as those of the genus Azospirillum. With this new technology in hand, it was necessary to evaluate the agronomic performance of corn, usin g the hybrid DKB390Y, in response to different application technologies, associated with different doses of inoculant. The experimental design was randomized blocks, in a 3x5 factorial arrangement (3 modes of application, 5 different doses of inoculant) in 4 plants. The experiment was carried out in a property adjacent to UFMT-Sinop, between February and July 2018. repetitions, totaling 60 plots. For the application modes, no significant differences were observed in the evaluation of chlorophyll, plant height, leaf area index and leaf nitrogen, while dry mass and productivity presented differences between the application modes. For the evaluation of the doses, the control was superior to the other treatments in the evaluation of chlorophyll, plant height, leaf area, leaf nitrogen and total dry mass, while for grain yield when 100mL.ha -1 was inoculated via leaf and 200mL.ha-1 foliar with bovine gelatine, showed values higher than control.