Efeitos da inoculação de Bacillus subtilis no desenvolvimento da soja

Abstract

The application of microorganisms in agriculture can promote an increase in crop productivity. The effects of the use of inoculants on the growth of soybean plants are broad, include benefits in viability, seed germination and emergence. In order to verify the action of Bacillus subtilis on the growth of soybean plants, 4 experiments were conducted. Two experiments were carried out with the variety M-8210 and two other experiments with the variety TMG-132. One of the experiments of each variety was evaluated at 30 days, and the other two experiments were evaluated at 45 days. In each experiment, two products were applied in the treatment of seeds, one containing the bacterium Bacillus subtilis strain pant001 at doses of 0, 0.2, 0.4, 0.6, 0.8 ml kg -1, plus Treatment with the protective fungicide Serenade, which also has Bacillus subtilis in its formulation at the dose of 0.2 ml kg-1. The three-leaf chlorophyll index of the upper, middle and lower third was evaluated at 15, 30 and 45 days in each plant. At 30 and 45 DAS, fresh mass, dry shoot mass, plant height, fresh root mass, root volume and root dry mass were evaluated. It was verified that inoculation of Bacillus subtillis increased the chlorophyll content of the leaves of both varieties, but inoculation had no effect on the attributes of the aerial part of the plants. In the TMG-132 variety, there were increases in the fresh mass of the plants after 30 DAS and in the root volume at 45 DAS.