Berezhnaya V.V., Klykov A.G., Sidorenko M.L., Bykovskaya A.N.
Bulletin of KrasGAU 2020; (2): 24-30
In the conditions of Primorsky Region the dynamics of the content of nutrients and soil microorganisms in spring wheat crops was studied during pre-sowing treatment and seedling spraying with bacterial complex (BC) consisting of nitrogen-fixing (a1), phosphate (f6, f19) and potassium-solubilizing (c2) microorganisms. The studies were conducted on experimental field of the FSBSI "FSC for Agrobiotechnology of the Far East named after A.K. Chaika” (Ussuriysk, Timiryazevsky Settlement) together with the FSC of Eastern Asia Terrestrial Biodiversity, FEB RAS (Vladivostok). The purpose of the study was to assess the effect of bacterial complexes on the dynamics of the content of nutrients, soil microorganisms and that of spring wheat yield. Experimental design included the variants of consortia of nitrogen-fixing, potassium- and phosphate-solubilizing strains obtained from the collection of microorganisms of the FSC of the East Asia Terrestrial Biodiversity, FEB RAS. As the reference, the drug “Extrasol” was used. It was found that using BC helps to increase the content of basic nutrients in soil and the number of microorganisms in the phase of wax ripeness of spring wheat grain. During pre-sowing treatment of seeds with bacterial complex a1c2f6, the NPK content in the soil increased by 1.4-2.7 times compared to the control. The maximum number of nitrogen-fixing microorganisms was revealed during pre-sowing treatment with a1f19 bacterial complex - 3.8 × 107 CFU / g of soil, phosphate-solubilizing using a1c2f6 consortia - 1.7 × 105, and potassium-solubilizing when spraying seedlings of BC f19s2 - 1.6 × 105 CFU / g the soil. The highest yield was established when processing seedlings in the variant with bacterial complex a1c2 - 3.6 t / hectare (control - 3.1 t / hectare).
