Vegetative and productive characteristics of soybean under doses of boron and inoculation of Trichoderma atroviride

The application of new management techniques with the objective of implementing in agriculture, such as the use of growth-promoting and/or plant-protecting microorganisms and micronutrients, appears as an alternative. Thus, the aim of the study was to evaluate the potential of Trichoderma atroviride in association with doses of B, analyzing the effects on nutritional contents, yield components and productivity. The study was carried out in the field, in a randomized block design in a 4 x 5 factorial scheme, whose treatments were combined, consisting of foliar application of T. atroviride in three phenological stages (V5, R1 and R5) and no application (SEM), and five doses of B (0, 500, 1000, 1500 and 2000 g ha-1). The data obtained were submitted to ANOVA and, when significant, the study of polynomial regression and Tukey's test was carried out, followed by Pearson's linear correlation analysis (p < 0.05). The use of the microorganism and doses of B did not result in a significant increase in the growth and productive yield of soybean (Glycine max (L.) Merr.), but the application of the micronutrient significantly increased the number of pods per plant and the foliar content of B. Positive correlations were observed between plant height and pod insertion height (r = 0.51***), pod with branches (r = 0.68***), grains with branches and pod (r = 0.69*** and 0.95*** respectively), as well as a negative correlation between 100-grain mass and plant height (r = -0.24*), and a non-correlation for yield and leaf content of B.