Symbiotic activity of chickpea plants depending on the technological methods of cultivation

Purpose. Establishment of the effect of seed inoculation with bacterial preparations and foliar dressing with micronutrient fertilization on the symbiotic productivity of chickpea varieties in the Right-Bank ForestSteppe. Methods. During the research, the following methods were used: field; statistical. Results. The results of the research on the effect of bacterial preparations as well as foliar microfertilizer application at different stages of organogenesis on nodules formation, their mass and nitrifying ability of chickpea Pegasus and Triumph varieties are presented. As a result of foliar fertilization, the mass of nodules in chickpea varieties gradually increased, which was caused by the process of photosynthesis intensification and, accordingly, an increase in the amount of assimilation elements in the formed nodules. It has been established that high indicators of symbiotic productivity in chickpea plants were observed when seeds were inoculated with the bacterial preparation Rizoline + Rizoseiv in combination with two foliar feeding with microfertilizer Urozhay Bobovi. Observation of the dynamics of accumulation of the number and weight of nodules showed that the maximum indicators during the growing season of chickpea were recorded in the phase of complete flowering. During the formation of the indicators of the number and mass of nodules, the varietal differences of chickpea were established. Maximum rate of knobs formation, their mass and nitrogenase activity (in the variety Pegasus – 41.3 pcs/plant, 0.92 g/plant, 4573 nmol ethylene/plant, in the variety Triumph – 37.9 pcs/plant, 0.72 g/plant, 4301 nmol ethylene/plant) were observed in the variant with the presowing treatment of seeds with the bacterial preparation Rizoline + Rizoseiv with two foliar feedings with microfertilizer Urozhai Bobovi. Conclusions. For the maximum realization of the genetic potential of chickpea Pegasus and Triumph varieties, the technology of its cultivation should envisage sowing with seeds, treated with biological preparations in combination with bioconstructor and carrying out two top dressing with microfertilizer application to plants in the phase of intensive growth and budding.