Agriculture and forestry

Mazur Olena Vasylivna – Candidate of Agricultural Sciences, Associate Professor of the Department of botany, genetics and plant protection, Vinnytsia National Agrarian University (21008, Vinnytsia, Soniachna Str. 3).

Dovgan Pavlo Olegovych is the director of the Separate Structural Unit "Cherniatinsky Vocational College" of the Vinnytsia National Agrarian University.

Dovgopolyi Vitaliy Serhiyovych is a postgraduate student at the Department of Botany, Genetics and Plant Protection of the Ukrainian National Academy of Sciences (21008, Vinnytsia, 3 Sonyachna St.).

The scientific publication presents the results of field experimental studies of the influence of pre-sowing seed treatment and fertilization and varietal characteristics on the duration of the vegetation and interphase periods and the dynamics of the height of soybean plants by phases of growth and development in the microstages of VVSN. The duration of the growing season of soybeans was influenced by varietal features, pre-sowing seed sterilization and fertilizers. Foliar fertilization with microelements Yara Vita Brassitrel Pro at microstage ВВСН12-13 against the background of application of mineral fertilizers at the rate of N16Р16К16 and seed treatment with Avido impregnant ensured the maximum duration of both the vegetation and interphase periods. In particular, the duration of the period ВВСН00-ВВСН10 – 14 days, and the duration of the period ВВСН10-ВВСН13 – 24 and 25 days, ВВСН13- ВВСН60 – 22 and 23 days, ВВСН60- ВВСН69 – 25 and 26 days, ВВСН69- ВВСН80 – 30 and 31 days, ВВСН80-ВВСН90 – 14 and 15 days, and the duration of the ВВСН00-ВВСН90 period is 115 and 120 days. This is more compared to the control option for 6 days. During seed inoculation, the length of the interphase periods VVSN13-VVSN60, VVSN60-VVSN69, VVSN69-VVSN80 was extended by 1; 1 and 2 days were compared without pre-sowing seed sterilization, and the duration of the period ВВСН00-ВВСН90 was 117 and 123 days, respectively. The maximum increase in the height of the plants was noted on the specified variant of the research. In particular, at microstage VVSN10 – 45.2 and 33.3 cm, at microstage VVSN60 – 67.5 and 58.4 cm, at microstage VVSN69 – 79.6 and 70.3 cm, at microstage VVSN80 – 84.4 and 76.3 cm, at microstage VVSN90 – 86.8 and 78.4 cm.This is more compared to the control version by 15.9 and 10.8 cm; 17.0 and 16.2 cm; 16.1 and 15.6 cm; 15.6 and 16.2 cm; 16.6 and 16.7 cm, respectively. During seed inoculation, the linear diameters of plant height increased at microstage VVSN10 – 47.0 and 35.5 cm, at microstage VVSN60 – 70.7 and 60.3 cm, at microstage VVSN69 – 83.3 and 73.6 cm, at microstage VVSN80 – 88.1 and 80.2 cm, at microstage VVSN90 – 91.5 and 81.3 cm, respectively. This is higher compared to 1.8 and 2.2 cm; 3.2 and 1.9; 3.7 and 3.3 cm; 3.7 and 3.9 cm; 4.7 and 2.9 cm than without seed inoculation, respectively.

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