Symbiotic productivity of soybeans depending on inoculation and fertiliser in conditions of the Right-Bank Forest-Steppe

Given the high value of biochemical composition soybean seeds and versatility using this crop, need for it will continue to grow, which makes necessary improve existing develop new technologies its cultivation, considering local agroclimatic resources. Therefore, study, aiming investigate agroecological foundations use chemical biological techniques in modern growing soybeans, is relevant. The purpose study was identify features formation symbiotic productivity soybeans under influence bacterial mineral fertiliser conditions Right-Bank Forest-Steppe Ukraine. A field method laid down according developed scheme achieve goal. positive effect inoculation on apparatus soy established. smallest increase number root nodules noted introduction N45P60K60 – 24.7-27.3%, depending variety. Small initial doses nitrogen were more effective within limits N15–30 they provided an active bulbs by 51.2-106.9%. Bacterisation with complex preparation Phosphonitragine increased roots 106.8-138.6%, interaction technological methods fertilisation contributed both leghemoglobin 128.5-198.6%, their mass 111.1-147.6%. maximally interacting seed factors a containing Br. japonicum B. Mucilaginosus strains applying N30P60K60 +N15 budding phase. This model crop cultivation highest legume-rhizobial symbiosis plants terms volume accumulation symbiotically fixed early-ripening variety Vilshanka 124.2 kg/ha, medium-ripening Suziriia 130.3 kg/ha. practical importance obtained results improvement varietal based application fertilisers retail against background phosphorus-potassium