In Ukraine, a sunflower is the main oil crop from which more than 90% of vegetable fats are produced. An increase in production is due to the expansion of cultivation area, which necessitates research on sunflower hybrids adaptability in the northern regions of Ukraine, where in recent decades, there has been a significant change of weather conditions and which may be favorable for its cultivation. The research was carried out in the Northern part of the Forest-Steppe of Ukraine on light loam chernozems. Reaction to growing conditions of four hybrids was studied by establishing the stability and plasticity of hybrids in terms of yield formation due to changes in morphological characteristics of plants. Yield potential realization is high enough, which is provided by sufficient amounts of positive, active, effective temperatures and precipitation. Calculation of the coefficients of plasticity and stability allows identifying stable sunflower hybrids, hybrids with a high level of plasticity, and recommending them to production. The yield of early-maturing hybrid Ukrainskyi F1 increases rectilinearly with plant density increasing (r = 0.977 -0.998), while hybrids P63LL06 (r = 0.651 -0.882); NK Ferti (r = 0.589 -0.846), and NK Brio (r = 0.689 -0.804) form a higher yield at standing densities up to 60 thousand plants per hectare, and with further thickening, the yield decreases. With the thickening of sowings, the height of all hybrids plants increases (r = 0.97 -0.99), and there is a decrease in the number of seeds per anthode, and the weight of 1000 seeds. Sunflower hybrids can be divided into the groups according to the peculiarities of yield formation due to morphological features: 1) yield increases only due to sowings' thickening-Ukrainskyi F1; 2) combined efficiency-increasing sowings' density to 60 thousand plants/ha and generative organs formation-NCKBrio; 3

Ìåòà. Âèâ÷èòè âïëèâ íà ôîðìóâàííÿ ïðîäóêòèâíîñò³ ã³áðèä³â ñîíÿøíèêó ð³çíèõ âàð³àíò³â îñíîâíîãî óäîáðåííÿ òà ïîçàêîðåíåâèõ ï³äaeèâëåíü íà éîãî ôîí³ çà âèðîùóâàííÿ íà ÷îðíîçåìàõ îï³äçîëåíèõ. Ìåòîäè. Äîñë³äaeåííÿ ïðîâîäèëè ó 2016, 2017 ðð. â óìîâàõ Õìåëüíèöüêî¿ îáëàñò³ íà ïîñ³âàõ ã³áðèä³â ñîíÿøíèêó Òàëñà, Ïðîíòî, Ãîëäåí â³äïîâ³äíî äî çàãàëüíîïðèéíÿòèõ ìåòîäèê. Çáèðàííÿ ïðîâîäèëè ïðÿìèì êîìáàéíóâàííÿì. Óðîaeàéí³ñòü âèçíà÷àëè ïîä³ëÿíêîâî ç óðàõóâàííÿì çàñì³÷åíîñò³ òà âîëîãîñò³ 14 % (ÄÑÒÓ 7011:2009). Âì³ñò î볿 âèçíà÷àëè ìåòîäîì çíåaeèðåíîãî çàëèøêó çà ÃÎÑÒ 10857-64, ïðîòå¿íó -çà ÃÎÑÒ 30131-96. Ðåçóëüòàòè. Âíåñåííÿ ì³íåðàëüíèõ äîáðèâ ïîçèòèâíî âïëèâàëî íà âðîaeàéí³ñòü íàñ³ííÿ äîñë³äaeóâàíèõ ã³áðèä³â. Âíåñåííÿ N 40 Ð 40 Ê 60 çàáåçïå÷èëî ïðèð³ñò óðîaeàéíîñò³ ã³áðèäó Òàëñà íà 53 %, Ïðîíòî òà Ãîëäåí -íà 58 %, òîä³ ÿê âíåñåííÿ N 80 Ð 80 Ê 120 çá³ëüøèëî âðîaeàéí³ñòü öèõ ã³áðèä³â ïîð³âíÿíî ç êîíòðîëåì â³äïîâ³äíî íà 75, 73 òà 81 %. ϳäaeèâëåííÿ êîìïëåêñíèì äîáðèâîì ßðèëî Îë³éíèé (2 ë/ãa) ó ôàç³ 3-4 ïàð ëèñòê³â òà ôàç³ óòâîðåííÿ êîøèêà çà îñíîâíîãî óäîáðåííÿ N 40 Ð 40 Ê 60 òà N 80 Ð 80 Ê 120 ï³äâèùóâàëî âðîaeàéí³ñòü íà 5,4-9,1 % ïîð³âíÿíî ç ôîíîâèìè âàð³àíòàìè óäîáðåííÿ. dz çá³ëüøåííÿì íîðì àçîòíèõ äîáðèâ çìåíøóâàâñÿ âì³ñò î볿 â ÿäð³ ñ³ì'ÿíîê äîñë³äaeóâàíèõ ã³áðèä³â ñîíÿøíèêó. Òàê, ó ã³-

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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.

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