Mineral and bacterial fertilizers use effectiveness when growing spring wheat in Western Siberia

The purpose of research is to analyze the effect of mineral and bacterial fertilizers, as well as their combined use, on the accumulation of basic nutrients in soil and products; microbiological activity in the soil and crop productivity (using the example of spring wheat). To resolve the issues raised, field experiments were carried out from 2018 to 2021 in the Kochenevsky district of the Novosibirsk Region. The object of research is spring wheat variety Novosibirskaya 31. Mineral fertilizers - ammonium nitrate, superphosphate and potassium salt were applied before sowing at the rate of N30P36K40. Inoculation of seeds with bacterial fertilizers was carried out on the day of sowing at a rate of azotobacterin and phosphorobacterin on a peat basis of 0.5 kg per hectare rate of seeds. Soil samples were taken at a depth of 0-20 and 20-40 cm in five places of the plot in two repetitions of the experiment. Soil samples for microbiological analyzes were taken with spatulas from a depth of 0-20 cm into sterile bags. Soil and plant samples were selected simultaneously according to development phases. For wheat - germination, tillering, flowering, milky and full ripeness. Wheat on black soil responds positively to applied mineral and bacterial fertilizers. Bacterial preparations on mineral backgrounds and without backgrounds contribute to the accumulation of mobile forms of nitrogen, phosphorus and a significant increase in beneficial groups of microorganisms in the soil. With the combined action of mineral and bacterial fertilizers, a slight increase in the protein content in spring wheat grain was noted. The increase in yield with the combined use of mineral and bacterial fertilizers compared to the control ranges from 12.2 to 62.6 %, and compared to the background - up to 14.5 %.