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

Graziele Cieslinski Gonçalves1*, Guilherme Ferreira Ferbonink1, Carine Hemkemeier1, Gustavo Caione1, Oscar Mitsuo Yamashita1, Silvana Aparecida Rocha Luiz2, and Marco Antonio Camillo de Carvalho1
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 × 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.
Keywords: Endophytic fungi, Glycine max, leaf fertilization, mineral elements, production.
1Universidade do Estado de Mato Grosso, Programa de Pós-Graduação em Biodiversidade e Agroecossistemas Amazônicos, Rod. 208, Jardim Tropical, Alta Floresta, Mato Grosso, Brasil.
2Universidade do Estado de Mato Grosso, Faculdade de Engenharia Florestal, Av. Perimetral Rogério Silva, Jardim Flamboyant, Alta Floresta, Mato Grosso, Brasil.
*Corresponding author (grazielecieslinski@gmail.com).