ECONOMIC EFFICIENCY OF GROWING ALFALFA FOR SEEDS BY INOCULATION WITH BACTERIAL PREPARATIONS

Research on the impact of seed inoculation with various bacterial preparations on seed productivity of alfalfa varieties, symbiotic nitrogen accumulation, and root system strength was conducted in 2018-2020 at the experimental field of the Institute of Irrigated Agriculture of the National Academy of Sciences of Ukraine. The economic efficiency of growing alfalfa for seeds under inoculation with bacterial preparations was also calculated. The highest seed productivity was obtained after inoculation with a cyanobacterial drug: 456.4 kg/ha in the Unitro variety and 361.1 kg/ha in the Zoryana variety, at a cost of 0.56 euro/kg and 0.70 euro/kg and conditional net profit of 1571.93 euro/ha and 1190.73 euro/ha, respectively. The highest root mass (5.76 and 5.80 t/ha) and nitrogen fixation (222 and 228 kg/ha) were noted in the Unitro and Zoryana varieties, respectively, when the cyanobacterial preparation was used. The greatest profit from growing alfalfa for seeds in crop rotation was obtained by inoculation with a cyanobacterial preparation in the Unitro variety 1,894.40 euro/ha and in the Zoryana variety 1,516.43 euro/ha.