AVALIAÇÃO DA PRODUTIVIDADE DO MILHO SOBRE INOCULAÇÃO BACTERIANA, CONSORCIADA COM A APLICAÇÃO DE ADUBAÇÃO NITROGENADA EM COBERTURA

Abstract

This study aimed to evaluate the effects of corn productivity on the absence and presence of the inoculation of the bacteria Azospirillum brasiliense, associated with urea in coverage, carried out at Afucomiva, in the municipality of Mineiros-GO, evaluating the total productivity, number of ears per plant, thousand-grain weight and ear height. Several treatments were carried out in a randomized block design in a factorial arrangement of 2x5 and 4 repetitions, with five different doses of urea 0, 50, 100, 150, 200 kg ha-1. Ear height in meters, weight of 20 ears given in kg, productivity in kg and in bags per hectare were evaluated. In the plot with the presence of the bacteria, the ear height, the treatment with 200 kg ha-1 of urea, reached a better average of 1.60 meters. In the weight of the 20 ears, he reports the use of the bacteria causing an increase in weight, better treatment was demonstrated with the use of the bacteria at a dose of 150 kg ha-1 with an average of 3.126 kg. The highest productivity occurred in the treatment of 150 kg ha-1 of urea with the bacteria and the lowest productivity was in the treatment of 0 kg ha-1 with the inoculation of the bacteria. The highest productivity in bags ha-1 was achieved with the bacteria in 150 kg ha-1 of urea. The aggregation of the bacteria Azospirillum brasiliense with the urea in coverage, obtained a positive action in the evaluations. It was proved that the inoculation in the seeds was effective, pointing out a reduction of excess nitrogen fertilizer.