INFLUENCE OF ASSOCIATIONS BETWEEN CHEMICAL PACKAGES AND INOCULANTS WHEN SOYBEAN PRE-SOWING OR NOT. 2018/2019 HARVEST; PINDORAMA-SP

With the aim of analyzing parameters with a direct and indirect relationship to biological nitrogen fixation and production components in soybeans subjected to different seed treatments with inoculants containing different concentrations of bacteria associated or not with the use of a protector on the day of sowing and the 7 and 14 days prior to sowing (DAS), and their comparison with three different synthetic chemical packages from Basf, Bayer and Syngenta, three experiments were installed in the experimental area of APTA -Polo Regional Centro Norte located in Pindorama-SP, 2018/19 harvest .Each experiment involved a synthetic package applied to the six treatments, therefore with 24 experimental plots.The treatments tested were: T1 = Control (without inoculation); T2 = Nitrogen fertilization with 200 kg nitrogen ha-1 (in installments); T3 = Standard Inoculation1 (Inoculant A = lower concentration of Bradyrhizobium bacteria applied via seed on the day of sowing; T4 = Inoculation (Inoculant B = Higher concentration of Bradyrhizobium bacteria+ Max Protection) applied via seed on the day of sowing; T5 and T6 = Preinoculation (Inoculant B + Max Protection) applied to the seed with respectively 7 and 14 DAS The parameters analyzed in R2 in three plants per plot were NODT = total number of nodules; root; MSNDOT= total dry mass of nodules; and in R8, at harvest, the components MMG = mass of one thousand grains and PG = grain productivity.The experimental design was in a simple factorial scheme, 3 packages versus 6 treatments, each experiment.it was in randomized complete blocks with 4 replications.The data were subjected to analysis of variance using the F test and the means compared using the Tukey test at 5%.From the results obtained, it was observed that the overall average of the experiments was the package.from Basf was statistically superior to the others tested for NNOT and MSPA with average values of 17.57