Use of growth-promoting bacteria to maximize soybean yield

The objective of this work was to evaluate the agronomic efficiency and viability of inoculants based on Paenibacillus azotofixans [CCTB10], Bacillus subtilis [CCTB04], Bacillus licheniformis [CCTB07] and Bacillus circulans [CCTB15], as growth promoters in soybean crops and their effects on the nutritional aspects of the crop when applied via sowing furrow. The experiment was conducted in five environments, Chapadão do Céu-GO, Chapadão do Sul-MS, Lavras-MG, Palmeira-PR, Maracaju-MS. The experimental design used was randomized blocks organized in a factorial scheme, with thirteen treatments referring to inoculants, and two modes of application (seed treatment and via sowing furrow), arranged in six replications. At 60 days after sowing, the shoot fresh weight (SFW, g) was measured in five plants per experimental unit. Nutritional analyzes on the leaves were carried out with the culture at R1 stage, with 15 leaves being sampled per experimental unit. Furthermore, the thousand grain weigh (TGW, g) was measured. The use of Paenibacillus azotofixans+ Bacillus circulans+ Bacillus licheniformis+ Bacillus subtilis, promotes increases in the shoot dry weight, thousand grain weight, grain yield, as well as in the potassium content in the grain. It can be used in seed treatment and in-furrow application.