EFFICIENCY OF BIOMODIFIZED MINERAL FERTILIZERS APPLICATION FOR BARLEY UNDER DIFFERENT SOIL ACIDITY OF SODDY-PODZOLIC SOIL

The results of the action of mineral fertilizers and bisolbifit biologics on barley on sod-podzolic, heavily loamy soil with different pH values are presented. The use of nitrogen and potash fertilizers in a long-term field experiment on strongly acidic sod-podzolic soil with a mobile aluminum content of 130 mg/kg did not significantly affect the yield of spring barley. The use of the microbial preparation bisolbifit as a fertilizer modifier in these conditions is ineffective. The use of a complete mineral fertilizer in doses of N60P60K60 on calcified soil with a weakly acidic reaction of the soil medium, the yield of spring barley grain reaches 35.3-40.4 c/ha at 19.3 c/ha under control without liming. The introduction of biomodified mineral fertilizers with bisolbifit preparation on this soil leads to an increase in grain yield by 12-14%, reaching 45.4 c / ha. The use of biomodified mineral fertilizers on an optimal background of soil pH increases the payback of 1 kg of NRK by an increase in grain yield by 3.2 kg. The increase in the yield of spring barley grain occurs due to an increase in the number of grains in the ear and the mass of 1000 grains, while the consumption of nitrogen, phosphorus and potassium by plants increases by an average of 9%. The application of a complete mineral fertilizer in combination with a microbial preparation on calcified soil forms a grain with a maximum protein content (12.9%) at a control level of 11.8%.