Liskovskyi S. Seed production formation in spring wheat depending on the elements of cropping practice in the Forest-Steppe of Ukraine

The dissertation presents a theoretical generalization and practical solution of an important scientific problem, which is to improve the elements of seed cropping practice for growing bread (Triticum aestivum L.) and durum (Triticum durum Desf.) spring wheat aimed at increasing productivity and improving sowing qualities and yielding properties of seeds of modern varieties. For the first time in the Forest-Steppe of Ukraine the peculiarities in formation of seed yield, sowing qualities, and yielding properties of modern varieties of bread spring wheat (MIP Zlata, Bozhena) and durum spring wheat (MIP Raiduzhna, Diana) depending on the application of agricultural techniques have been established. The peculiarities of the duration of the period of post-harvest ripening for varieties belonging to different types of spring wheat have been revealed. The basic technology of growing spring wheat seeds in the Forest-Steppe zone has been improved thus providing additional 0.22–0.47 t/ha of seeds with high sowing qualities and yielding properties. Provisions for the formation of quality indicators of seeds depending on the biological characteristics of spring wheat species and varieties, as well as the use of plant protection products and biological microfertilizer in the Forest-Steppe of Ukraine have been further developed. The results of experimental research were summarized in guidelines “Seed production of winter and spring wheat”, they were tested and implemented in seed farms of various forms of ownership in the Forest-Steppe zone of Ukraine.