The consequence of applying biomodified organo-mineral fertilizers on the yield and quality of oats on different acidity background sod-podzolic soils

In the field experiment, on sod-podzolic light loamy soil, in the conditions of the Northern Non-Chernozem region, the aftereffect of traditional fertilizer systems (including the option without fertilizer), introduced in a dose over 5 years of N30P24K45 and OMF (granular organicmineral fertilizer), in a dose of N30P20K23 biomodified with BisolbiFit preparations (Bacillus subtillus strains H - 13) was compared for 3 years, Phosphatovite (strains of Baccillus mucilaginosus), PhosphoActive (strains of Bacillus subtillus + Baccillus mucilaginosus), on yield and quality indicators of oats. The studies were carried out at 2 levels of soil acidity: pHKCl 5.1- 5.3 (without liming) and pHKCl 5.7-5.9 (with liming). Biomodification of OMF with PhosphoActive allowed for the 2nd year of aftereffect to obtain the yield of oat grain at the level of 33.1 - 33.6 centners per ha, while in the same period of aftereffect, the yield in the variant with a mineral fertilizer system was 29.5-32.3 centners per he. At the same time, the collection of crude protein in variants with biomodified OMF was 3.2-3.4 centners per ha, with an average nitrogen content of 2.41% in grain, the change in acidity backgrounds was insignificant. The aftereffect of OMF treated with Phosphatovite made it possible to reduce nitrogen costs per unit of oat grain yield and increase the nitrogen index to 0.48 units against the background of lime, whereas in traditional fertilizer systems this indicator averaged 0.44 units against a similar background.