Amenização do estresse de fósforo usando bacillus na produtividade da soja

Abstract

Brazil is dependent on fertilizers, and this dependence can compromise food security, given the country's importance in grain production for the world. In tropical soil, there is a limitation for the nutrient phosphorus (P), depending on the nutrient dynamics in the soil. Bacteria from the genus Bacillus can be used to alleviate P stress in soybeans. Therefore, the present research aims to investigate the effects of inoculation with Bacillus sp. on soybean productivity under phosphorus stress conditions. The experimental design used was a factorial scheme with the absence and presence of Bacillus sp. and two concentrations of P (P-control and P-stress), with four replications. Plant dry mass, number of pods per plant, and productivity were evaluated. Regarding the dry mass of soybean plants, it is possible to note that when subjected to P-control conditions, both in the presence and absence of Bacillus, the results were superior compared to Pstress conditions. The conditions of P-severe and the absence of Bacillus were superior in the production of soybean pods. For P-control in the presence of Bacillus, productivity was higher.