Adaptability of introduced table carrot hybrids to the conditions of the right-bank Forest-step of Ukraine

Results.It was established that seed pre-treatment with a combination of vitamin E + ubiquinone-10 contributed to the formation of the maximum number of lateral roots at all stages of soybean growth and development.At the 1-3 trifoliate leaf stage, this combination facilitated an average of 14.2 roots, which exceeded the control values by 99.2%.At the flowering stage, plants in this variant formed an average of 19.0 roots on the main root, surpassing the control by 70.1% and Vympel treatment by 11.7%.A positive effect was also observed with the combinations vitamin E + methionine + POBA + MgSO and vitamin E + methionine + POBA.At the 1-3 trifoliate leaf stage, pre-sowing seed treatment with vitamin E + ubiquinone-10 increased the fresh biomass of the root system by 111.4% compared to the control.At the flowering stage, applying the same combination contributed to an increase in root system biomass by 61.8% relative to the control.An increase in fresh biomass of the root system was also noted with the use of vitamin E + methionine + POBA + MgSO and vitamin E + methionine + POBA.Analysis of the dynamics of leaf area expansion showed that all studied combinations of metabolically active substances positively influenced its growth.The highest values were observed with vitamin E + ubiquinone-10, ensuring maximum leaf area development throughout all research stages.Conclusions.A direct correlation was found between root system formation, its biomass, and soybean leaf area.Thus, the studied combinations of metabolically active compounds can serve as promising growth regulators for leguminous crops, while presowing seed treatment with these substances represents an effective technological element in soybean cultivation.