Prática de inoculação diferencial da soja em associação a micronutrientes e desempenho da cultura

Abstract

verify the relationship between the use of inoculant and the cobalt and molybdenum micronutrients under different forms of plant supply. The objective of this work was to evaluate the effect of soybean inoculation with Bradyrhizobium japonicum under different application strategies, in association with cobalt and molybdenum and fungicide micronutrients, in nodulation and agronomic performance of the crop. The experiment was conducted in the 16/17 crop, at the Unepe of Annual Cultures of the Federal Technological University of Paraná, Câmpus Dois Vizinhos. The cultivar used was NS 4823 RR. Eighteen treatments were tested, in isolation and in combination, Bradyrhizobium Japonicum via seed and foliar route, between the V2 and V3 stages; cobalt and molybdenum applied to seeds and leaf; additive for inoculant on farm, composed of metabolites of active bacteria and complex of biopolymer sugars via seed and via foliar; Protreat fungicide via seed. In the R1 stage, number and mass of nodules were evaluated. At harvest, the analyzed variables were: number of grains per plant, mass of one thousand grains and productivity, in kg ha-1. In the present study it was evident that there is no relationship between soybean leaf inoculation and grain yield. It was not possible to determine a specific treatment as the most appropriate for soybean, since, when compared with the other combinations, the ratios were not positive.