Growth promotion and phosphate solubilization in soybean crop: seed coinoculation with Bradyrhizobium japonicum and Pseudomonas fluorescens

• Autor(a) principal: Guimarães, Vandeir Francisco
• Data de Publicação: 2021
• Outros Autores: Klein, Jeferson, Klein, Débora Kestring
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/20078
• topic: Glycine max L.; Plant growth promoting bacteria; Phosphate solubilizing bacteria; Seed inoculation e productivity.; Glicina max. L.; Bacterias promotoras del crecimiento de las plantas; Bacterias solubilizadoras de fosfato; Inoculación y rendimiento de semillas.; Glycine max L.; Bactérias promotoras de crescimento vegetal; Bactérias solubilizadoras de fosfato; Inoculação de sementes e produtividade.

Research with inoculants containing bacteria with biological nitrogen fixation capacity, as well as growth promotion, mainly associated with root growth are already well known and consolidated for the soybean crop. Studies aimed at promoting plant growth with a focus on phosphate solubilization in the soil are more recent and promising, given the importance and difficult dynamics of this nutrient in the soil. Thus, the present study aimed to evaluate the field potential of promoting growth and phosphate solubilization of a liquid inoculant containing Pseudomonas fluorescens isolates, Strain ATCC 13525, for soybean cultivation, via seed treatment, associated with phosphate fertilization. Four trials were conducted, from October 2018 to March 2019 in experimental areas located in the municipalities of Toledo, Palotina, São Miguel do Iguaçu and Cascavel, in the state of Paraná. A randomized block design was used, with seven treatments and four replications, totaling 28 experimental plots in each experiment. The treatments were: T1- Control (without phosphate fertilization and without seed inoculation); T2- 50% phosphate fertilization (super triple) and no inoculation; T3- 100% phosphate fertilization and no inoculation; T4- 50% phosphate fertilization and inoculation of seeds with the inoculant based on P. fluorescens, at a dose of 50 mL50 kg-1 of seeds; T5- 50% phosphate fertilization and seed inoculation with P. fluorescens (100 mL50 kg-1 of seeds); T6- 50% phosphate fertilization and seed inoculation with P. fluorescens (150 mL 50 kg-1 of seeds); T7- 50% phosphate fertilization and seed inoculation with P. fluorescens (200 mL50 kg-1 of seeds). All treatments were also inoculated with Bradyrhizobium japonicum (strains 5079 and 5080), at a dose of 100 mL 50 kg-1 of seeds.