Korshevniuk S. Formation of lentil grain productivity depending on pre-sowing treatment of seeds and foliar fertilization in the conditions o of the Right-Bank Forest-Steppe of Ukraine.

The dissertation work is devoted to the study of the processes of growth and development of lentil plants, the formation of the assimilation surface and symbiotic potential, with the search for optimal options for the implementation of the said processes in the size and quality of the formed crop with the pre-sowing treatment of seeds with inoculant and microelements and the implementation of a system of foliar fertilization. The dissertation studied the peculiarities and regularities of the growth of the vegetative mass of plants in relation to the development and formation of their assimilation surface and the species structure of symbiotic potential. The activity of the photosystem of lentil plants was studied based on its response to the application of technological measures to optimize lentil nutrition in view of the basic and indicator indicators of the chlorophyll fluorescence induction curve. The peculiarities of the formation of the individual structure of grain productivity, qualitative indicators of the chemical composition of grain are determined. Based on the application of correlation and regression analysis, optimal hydrothermal regimes of lentil vegetation were formulated, which, in interaction with the applied technological measures to optimize plant nutrition, will ensure the maximum realization of the yield potential of this agricultural crop. The dissertation presents specific ways of solving the scientific problem of stabilizing and increasing the realization of the yield potential of zoned lentil varieties due to a comprehensive approach to improving its nutrition in the system of both pre-sowing seed preparation and due to its technological correction in the option of selecting optimal options for foliar feeding during the growing season. The history of the origin and national economic importance of lentils and its importance for Ukraine to ensure the food security of the country as a strategic niche culture are detailed. Modern approaches to the system of its fertilization and technologies for the use of its alternative options are considered, taking into account modern approaches and the assortment of agrochemicals. Peculiarities of the hydrothermal conditions of lentil vegetation have been investigated based on the fertility potential of gray forest soils from the point of view of providing sufficient resources for the physiological implementation of the processes of growth and development of lentil plants and the formation of appropriate levels of bioproductivity. Based on this, favorable and stressful years and weather regimes were determined from the point of view of their influence on the formation of both individual blocks of growth processes, and their interaction with technological factors put to study according to the scheme of the experiment. The optimality of the option of combining Anderiz-r seed inoculation (2 l/ha) with pre-sowing seed treatment of Oracle seeds (1 l/t) with foliar fertilization in combination with Yarylo active start PRO (2.0 l/ha in the phase of the beginning of stemming) + Avangard Bean Complex (2.0 l/ha in the budding phase) against the background of pre-sowing application of N30P30K30. This variant contributed to the optimization of the general phenological development of lentil plants with the extension of the total duration of the growing season by an average of 10 days while the most productive interphase periods were extended by 2–3 days compared to the variant where only background pre-sowing fertilizer was present. Taking into account the fairly short vegetation of lentils, this contributed to a significant increase in the overall bioproductivity of plant morphogenesis, while increasing the preservation of plants by 6.3% compared to the control. The last factor ultimately ensured the maximum levels of plant preservation, which guaranteed the optimal placement of plants per unit area and high rates of photosynthetic characteristics of the plant assimilation surface. The linear growth of the stem was studied with the determination of the interphase average daily growth of the stem height, the formation of such signs as the formation of the number of stems on the plant, the level of its foliage, the value of the position of the lower bean by height was evaluated. The processes of formation of the assimilation surface are detailed both in terms of area parameters and indicators of photosynthetic active potential and net productivity of photosynthesis. The factors of chlorophyll fluorescence induction when applying technological options for optimizing lentil nutrition are analyzed separately. The analysis was carried out in view of hydrothermal conditions and determination of their role in the morphogenesis of lentil plants in interaction with the studied options for the use of inoculation, treatment of seeds with trace elements and the use of foliar feeding.