The effectiveness of Ryzoboft and Ryzohumin microbiological preparations use for beans biometric indicators (Faba bona Medic)

The use of biological preparations based on nodule bacteria and complexes containing, except rhizobia, biologically active substances is a cost-effective and environmentally sound element of legumminous cultivation technologies. The study aimed to establish the influence of pre-sowing treatment of seeds with microbiological preparations Ryzoboft and Ryzohumin according to the indicators of growth processes (Faba bona Medic) of Khorostkivskyi variety beans in the conditions of Western Forest-Steppe of Ukraine. The research was conducted during 2018–2020 in the felds of agrobiolaboratory of Ternopil National University named after Volodymyr Hnatiuk. During the vegetation period, the height of the stem was measured, the number of leaves on the plant was counted, and the raw and dry weight of the aboveground organs and the root system were determined. It was established that microbiological preparations Ryzoboft and Ryzohumin affect the growth processes of beans against the background of spontaneous inoculation by local populations of nodule bacteria. The increase in stem height of the experimental plants in comparison with the control of pre-sowing treatment of seeds with Ryzohumin at the beginning of flowering was 13,9 %, during flowering –14,1 %, and in the green bean phase – 9,0 %. Pre-sowing inoculation with Ryzoboft signifcantly increased the height of the bean stalk only in the green bean phase – 11,8 %. During flowering of beans with the use of the Ryzohumin signifcantly increased the number of leaves on the plant – by 25,7 % compared to the control. In the green bean phase, both studied preparations signifcantly influenced the process of leaf formation. There was a signifcant effect on the foliage of plants of the Ryzohumin, compared with Ryzoboft during the study period. Statistically signifcant increase in the indicators of raw and dry mass of aboveground organs of beans in the green bean phase under the influence of Ryzoboft and Ryzohumin was revealed. During flowering in the conditions of pre-sowing treatment of seeds with Ryzohumin, a signifcant increase in the raw mass of the root system was found. The obtained results indicate the prospects of further studies of production processes of bean plants under the influence of microbiological preparations Ryzoboft and Ryzohumin. Key words: beans, inoculation, Ryzoboft, Ryzohumin, vegetation period, biometric indicators.