Desempenho da cultura do trigo com aplicação de Azospirillum brasilense e BiomaPhos combinados a doses de adubação nitrogenada

Abstract

The wheat crop is highly responsive to nitrogen fertilization, due to the element’s participation in metabolic functions. Considering the high cost of fertilizers, the use of inoculants appears as an alternative to improve the use of nutrients in the system, as well as to reduce production costs. The research aimed to evaluate the effect of the microorganism Azospirillum brasilense and BiomaPhos (Bacillus subtilis BRM 119 and Bacillus megaterium BRM 2084), combined with N doses on the performance of UTF wheat cultivar -25. The experiment was conducted in a randomized block experimental design with split plots and four replications. Three different treatments were used in the main plots: T1 – Control, T2 – Azospirillum Brasilense and T3– Azospirillum brasilense + BiomaPhos distributed in the seeds two hours before sowing; four doses of N were applied to the subplots: 0, 60, 120 and 180 kg ha-1, applied at the tillering stage of the wheat crop, using urea as a source. Morphological characters (ear size and plant height), yield components (number of grains per ear and thousand-grain mass), grain yield and the final quality of the harvested product through hectoliter weight (PH) were evaluated. physiological maturation stage. For the variables plant height and number of grains per ear, no significance was found for the treatments. Ear size, PH and yield were influenced by N doses, with quadratic, negative linear and positive linear behavior, respectively. For mass of a thousand grains there was interaction between treatments demonstrating that, regardless of the use or not of inoculants, there was response to N doses, presenting a linear fit for the treatment without inoculation and quadratic for the treatments that received inoculation.