Realization of genetic potential of sunflower hybrids under the influence of nutritional conditions

The use of microfertilizers on the background of the main fertilizer helps to increase the efficiency of plant use of nutrients of mineral fertilizers and soil, which provides increased yields and improved quality indicators of the crop. The aim of the research was to establish the influence of culture conditions and selection of high-yielding hybrids (NK Diamantis, SI Kupava, NK Neoma) for specific soil and climatic conditions through the formation of their productivity. Field research was conducted during 2018–2019 on typical low-humus chernozems of the Chernihiv region. The research program provided for the establishment of a three-factor field experiment, which studied hybrids (factor A) fertilizer options (factor B) and foliar fertilization (factor C) in phase 4 and 8 sunflowers leaves with Ecoline Bor, Nertus Bor, Bast Bor. The studied sunflower hybrids are NK Diamantis, SI Kupava, NK Neoma. Studies have shown that the most productive was the hybrid SI Kupava with the maximum yield on the variant with the use of N36R56K108S28 + N23 + Ecoline Boron (in phase 4 and 8 leaves of 1 l / ha) - 3.46 t / ha. The fat content in the seeds of sunflower hybrids was determined by the morphobiological features of the hybrid and fertilizer options. The use of foliar fertilization with trace elements had a positive effect on the fat content in the seeds of sunflower hybrids, which allowed to obtain the maximum value for the option of making N36R56K108S28 + N23 + Ecoline Boron (5-6 leaves) in plants of the hybrid SI Kupava - 51.1%. The maximum content of oleic acid was found in the hybrid SI Kupava on the variant with the introduction of N27R42K81S21 + N23 + Ecoline Boron (5-6 leaves) - 77.2%. Due to the use of fertilizers containing boron, the content of this polyunsaturated acid can be increased by improving the quality of sunflower seed oil. The highest oil yield, according to the calculations, was obtained on the variant with the introduction of N36R56K108S28 + N23 + Ecoline Boron (5-6 leaves) in plants of the hybrid SI Kupava, which was 1.64 tons per 1 hectare.