The dissertation provides a theoretical substantiation of experimental material of the existing methods of accelerated seed reproduction of new varieties of soft winter wheat and a practical solution to the scientific problem of optimizing the system of their main and additional nutrition in the soil and climatic conditions of the Western Forest-Steppe zone on gray forestal surfacial gleyed soils.
6 The structure of the thesis is determined by the logic of the research, the tasks and consists of an introduction, six chapters, conclusions to sections, conclusions to the dissertation, recommendations for agricultural production, a list of sources and applications used. The relevance of the topic is highlighted as well as the importance of the delivery of pre-basic seeds of new varieties of various originating institutions in Ukraine due to the lack of breeding programs in the studied soil-climatic zone and the feasibility of producing basic seeds to provide farms in the region. The connection of work with the corresponding thematic programs, plans, tasks of the Institute of Agriculture of the Carpathian Region of the NAAS is reflected. The goals of dissertation research, the main tasks, research methods for their implementation are formed and the scientific novelty of the results obtained is reflected. The personal contribution of the applicant is highlighted, publications and approbation of research materials on the topic of dissertation work are given. The factors of influence on the formation of productive properties and sowing qualities of seeds of soft winter wheat have been analyzed. It is noted that the least costly and environmentally friendly factor in the intensification of the seed industry is the efficient use of varietal resources, which significantly increases the level of crop yields without large expenditures of funds. To obtain a high yield of grain and seeds, it is necessary to scientifically substantiate the use of mineral fertilizers and microfertilizers by the stages of organogenesis. The characteristics of the soil and climatic conditions of the Western ForestSteppe, in particular the peculiarities of the weather conditions in the years of the research, are given. The physicochemical and agrochemical characteristics of the soil of the research sites are given also. The research scheme, techniques and methods are described. The characteristics of varieties, mineral fertilizers and micronutrients are given. On the basis of biological requirements and the manifestation of abiotic factors, the adaptive characteristics of new varieties of soft winter wheat were substantiated and the insignificant phenotypic variability of the genotypes of the forest-steppe
7 ecotype and their priority for implementation in the agricultural production of the region were determined. The change in weather factors during the growing season of winter wheat due to higher air temperature and less precipitation has been confirmed, which contributes to high field germination of seeds (92.4-97.2%), provides lengthening of the autumn growing season to 56-65 days, accumulation of a sufficient amount (30.7-32.3%) of sugars in the tillering nodes, allows the formation of a welldeveloped root system and aboveground mass, which contributes to a high percentage of overwintering of plants (90.4–91.7). Revealed the relative resistance of varieties to diseases. And higher by 8.1-16.4 °C temperature regime with less precipitation during the formation-harvesting of grain contributed to productivity at the level of 5.44 t/ha (Hratsiia bilotserkivska)– 5.62 t/ha (MIP Vyshyvanka), seed productivity - Spivanka Poliska (4.18 t/ha) – MIP Vyshyvanka (4.30 t/ha), with a high yield conditioned seeds – 74 – 76% and the multiplication factor – 16.5-16.9 units.
