Impact of soil microorganisms consortium on soil and plant health

A comprehensive analysis of native strains of bacteria of the genus Bacillus spp. isolated from the soils of the Novosibirsk region was carried out to assess their growth-promoting properties and ability to improve the microbiological activity of the soil. The experiment was carried out in the microbiology laboratory of the Novosibirsk State Agrarian University, where a unique collection of native strains of bacteria of Siberian soils was created. The collection contains 30 cultures of soil bacteria of the genus Bacillus spp., selected during 2017-2023. Field studies were carried out on the experimental fields of the Tulinskoye experimental farm located in the northern forest-steppe of Priobye in 2022-2024. Of the three years of research, two years were humid (2022, 2024), one was dry (2023). 6 strains of agronomically useful bacteria of the genus Bacillus spp. were identified. Bacterial strains 106, 201, 23, 26, Bacillus megaterium and Bacillus subtilis had good growth-stimulating properties. An increase in germination energy, germination and length of embryonic organs of radish and wheat seeds was noted. The growth and development of eggplant in field conditions occurred faster by 1-2 days when treated with a consortium of bacteria, the crop yield increased by 11.5%. The positive role of the studied bacterial strains on the microbiological activity of the soil was proven. A decrease in the number of phytopathogenic and toxigenic micromycetes was observed along with an increase in antagonists in the soil. During the growing season, an increase in the number of nitrogen-fixing bacteria and bacteria consuming mineral forms of nitrogen, oligonitrophils was noted. The soil had increased cellulolytic and enzymatic activity.