Fundyrat K. Seed productivity of winter triticale varieties depending on fertilization on the irrigated lands of the Southern Steppe of Ukraine

Object of study – processes of formation of seed productivity of winter triticale varieties depending on fertilizer on irrigated lands of the Southern Steppe of Ukraine. Aim – to study and determine the formation patterns of seed productivity of new varieties of winter triticale depending on their biological potential, fertilizer system and develop a set of technological measures for seed production with high varietal, sowing qualities and yield properties on irrigated lands of the Southern Steppe of Ukraine. Methods – general scientific methods - analysis, synthesis, modeling. Special - field (assessment of seed germination, determination of biometric indicators and elements of agrocenosis formation, grain and seed crop yield); laboratory (agrochemical analysis of plants, soil moisture, determination of elements of crop structure and sowing, yield and technological qualities of seeds); comparative and calculated (determination of economic efficiency); statistical (assessment of the reliability of experimental data obtained, determination of correlations). Results – It is established that in the irrigated dark-chestnut lands of the Southern Steppe of Ukraine, in order to obtain the yield of conditioned seeds of winter triticale varieties at the level of 5.0 t/ha, with better sowing properties and high production profitability, it is necessary to: use high-yielding varieties of medium-ripe group Bogodarske, Raritet and Buket. Preference should be given to the Bogodarske variety, which provides the highest grain yield, seeds and reproduction rate; for accelerated propagation of seeds of winter triticale varieties it is necessary to apply N60P60 in the system of pre-sowing tillage with the subsequent early fertilization N30 (urea ammonia mixture (UAM)); carry out spraying of crops at the end of the "tillering" phase with microfertilizer Nanovit micro (2 l/ha). Novelty – for the first time оn the irrigated lands of the Southern Steppe of Ukraine the regularities of seed productivity formation, sowing, yield and technological properties of seeds are scientifically substantiated and the reproduction coefficient of winter triticale depending on the genetic characteristics of varieties and elements of cultivation technology is determined. The scientific value – an economically feasible fertilizer system has been established, theoretical and practical results of scientific research have provided an opportunity to develop a patent for a utility model and scientific and practical recommendations on agro-technological methods of caring for winter triticale crops on irrigated lands of the Southern Steppe of Ukraine. Sector – agriculture.