Desempenho produtivo do capim Paiaguás inoculado com bactéria promotora de crescimento vegetal associado à adubação nitrogenada.

Abstract

The objective of this study was to inoculate Azospirillum brasilense via foliar and seed, associated with nitrogen fertilization, on the productive characteristics of Paiaguás grass. The experiment was conducted in the experimental forage sector of the Federal Rural University of the Amazon, located in the municipality of Parauapebas, Pará. The experimental design was in randomized blocks in a 3 x 3 factorial arrangement, with three inoculation methods (control, foliar and seed) and three nitrogen fertilization rates (0, 75 and 150 kg ha-1 of N), with four replicates. An effect (P ≤ 0.05) was observed in the interaction between inoculation and nitrogen fertilization for the variables: total forage green mass, total forage dry mass, leaf blade dry mass, stem dry mass and number of profiles m2. A dose of 150 kg ha-1 of N, with climatic conditions planned for forage growth, promotes a positive effect of N on total forage dry mass and LAI (leaf area index). Inoculation with Azospirillum brasilense, especially via foliar generation, is efficient in increasing the productivity of Paiaguás grass, with the potential to reduce the use of nitrogen fertilizers, promoting greater sustainability in pasture management.