Productivity and Grain Quality of Spring Wheat Variety Zlata When Inoculated with Biopreparations on Different Background of Mineral Nutrition

The article deals with inoculation of spring wheat (Triticum aestivum L.) seeds of Zlata variety with bacterial preparations stimulating plant development on mineral background and in its absence. The previously tested microbiological preparation Flavobacterin (Flavobacterium sp., strain 30) and a new test preparation MF-1 (Bacillus amyloliquefaciens) were used. The experiments were conducted in 5 kg growing vessels on well-cultivated sod-podzolic soil. As a result of the study it was found that seed inoculation without mineral background significantly increases plant height, dry weight and grain productivity from 11-16% relative to the control variant without inoculation. At the natural level of mineral background (in the absence of fertiliser application) rhizobacterial preparation Flavobacterin stimulated the increase of nitrogen content in grain by 41% and had no effect on the process of accumulation of phosphorus and potassium. At the same time, the tested biopreparation MF-1 significantly reduced the concentration of phosphorus in grain and did not stimulate the increase of other indicators relative to the control without pre-sowing inoculation. Thus, the use of microbiological preparations at the use of mineral background did not significantly affect the growth processes and grain productivity of wheat. At the same time, there is a significant increase in dry weight of wheat plants when inoculated with Flavobacterin biopreparation relative to background (No, 1Po,1Ko, 1). Inoculation of seed material with the introduction of mineral nutrition elements compared to the background in the absence of inoculation contributed to a significant increase in the content of only nitrogen in grain by 15% (Flavobacterin + NPK) and by 20% (MF-1 + NPK). However, inoculation in these experiment variants did not significantly change the content of phosphorus and potassium in grain.