INOCULAÇÃO ANTECIPADA DE SOJA ON FARM COM USO DE INSUMOS BIOLÓGICOS COMERCIAIS E O PACOTE QUÍMICO DA BASF

Abstract

The objective was to analyse a agronomic traits and production components in soybean grown in Pindorama, São Paulo State, Brazil, 2018/19 season, submitted to different treatments of seeds with inoculants of unlike concentrations of bacteria associated or not with the use of a protector in others periods before sowing, together with BASFs chemical technology package. The tested treatments were: T1 – control; T2 – chemical nitrogen fertilization; T3 - standard comercial inoculant applied on the day of sowing; T4, T5 and T6 – commercial inoculant with the highest conceentration of Bradyrhizobium associated with the use of a protector applied respectively at 0,7 and 14 days before sowing. In R8, plant height and insertion height of the first pod were evaluated, lodging (Lo); tousand grain mass (TGM); number of pods (NP); average number of grains per pod (NAGP); grain yield (GY) and total nitrogen content in grains (NG). From the results obtained it was verified that for Lo and NAGP no significant diferences were noticed between the tested treatments. As for TGM, it is noted that treat ments T2, T3, T4 and T5 did not differ form each other and were statistically superior to control T1 and T6. In Terms of GY, the T4 stood out for its higher productivity with 2860 kg ha-1. It is not worthy that T3 and T5 obtained means statistically similar to the same with respectively 2695 and 2690 kg ha-1. Under these conditions, the use of the T4 treatment can e recommended and as a second option to the soybean grower if the is unable to carry out the seed treatment on the day of sowing, the T5, that is, inoculated within 7 days before sowing.