Preparation testing based on Bacillus spp. consortium in spring wheat cultivation

The aim of the study is to investigate the efficiency of using biopreparations based on a synthetic con-sortium of Bacillus spp. bacteria in the spring wheat protection system. The studies were conducted in the Tyumen Region, the culture used for the experiment was spring wheat, experimental and commercial forms of bacterial preparations, the efficiency of their stimulating and fungicidal properties was studied. A positive effect of the studied bacterial preparation, which is a consortium of Bacillus simplex and Bacillus megaterium bacteria, as well as its immobilized form on biochar particles, on the growth and development of spring wheat was established. In laboratory studies, a fungicidal effect of the preparations was recorded against Alternaria micromycetes. High rates of the studied bacterial preparation had a stimulating effect on the development of embryonic organs and seed germination. Daily sprout treatment contributed to an in-crease in its growth by 20–30 % during 7 days of growth, the sprout length increased by 15–20 % at the average rate of the bacterial preparation and by 24–32 % at a high rate, with an excess of the plant weight of the control variant by 15–26 %. The indicators of the spike structure, morphometric parameters of the flag leaf had a reliable excess according to the studied bacterial preparation with the inclusion of seed treatment schemes and especially vegetative plants in the main phases of application. The crop yield for the variants was 4.5–4.7 t/ha, no differences were observed between the variants. A slight excess of con-trol was noted for the variants of application of the tested variants of the biological preparation for seeds at a rate of 5.0 l/t and the scheme of application of Biogor-Zh. Drought conditions of the growing season, weak colonization of plants by pathogenic fungal infection leveled the stimulating effect of the studied mic-robiological preparations on crop productivity.