The stimulating effect of bacterial inoculants increases the weight and length of the root system of plants, which leads to effective absorption of water and nutrients from the lower layers of soil and increases the yield. Biological fungicides based on bacteria provide protection against the main pathogens of seedlings and plants during the growing season of agricultural crops. The effect of bacterial inoculants Biotrinsik i30 (Bacillus simplex) and biological fungicide-growth promotor Biotrinsik X11 (Kosakonia cowanii SYM00028) on the growth and development of maize plants was investigated. It was shown that treatment of maize seeds with Biotrinsic X11 stimulates the growth and development of the root system compared to the control. The weight of the roots increases by 12—30 %. The plants treated with biostimulants were 15—23 cm higher than those on the control. Biotrinsic X11 seed treatment provided a significant grain yield increase compared to the control — by 0.37 t/ha. An increase in the grain maize productivity was observed under complex seed treatment with Maxim XL 1 L/t + Biotrinsik X11 0.36 kg/t + Biotrinsik i30 0.36 kg/t compared with Maxim XL only. The combination of Biotrinsik X11 treatment with Biotrinsik i30 provided the highest stimulating effect on maize plants. In this variant, the highest yield and a significant increase compared to the control was obtained — 0.43 t/ha. The obtained results give reasons to claim that the treatment of maize seeds with bacterial preparations has a stimulating effect on the regulation of growth and development of maize plants, reduces the negative impact of environmental stresses in ontogenesis and the risk of crop loss. Thus, bioinoculants and biological fungicides are becoming an integral element of modern technologies for growing maize.
Keywords: Zea mais L., bacterial inoculants, biological fungicides, Biotrinsik i30 PS, Biotrinsik X11 PS
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