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The influence of cultivation technology elements on sunflower productivity in the conditions of Western Polissia
The application of mineral fertilizers and foliar feeding with growth stimulators improves plant growth and development, indicators of crop structure, and increases sunflower productivity. The purpose of the study was to establish the peculiarities of sunflower crop formation and seeds quality in the conditions of Western Polissia depending on biological potential of the studied hybrid, different doses of mineral fertilizers and foliar application of growth stimulators. It has been established that as a result of the research conducted, the technology for growing sunflowers in the conditions of Western Polissia has been improved, which involves mineral fertilization in doses of N90P60K120 and N60P30K90 in combination with foliar application of growth stimulators Vympel 2 (0.5 l/ha) and Grow Amino (1 l/ha) in the 3–4 and 5–6 leaf stages. The largest sunflower heads diameter of 24.1 and 23.6 cm and the number of baskets of 6.1 and 5.9 pcs/m2 were found at doses of N90P60K120 and N60P30K90 in combination with two applications of Vympel 2 (0.5 l/ha) in phases 4 and 5–6 leaves, while in the variant without fertilizers these indicators were significantly lower – 18.9 cm and 4.4 pcs/m2 respectively. The weight of 1,000 seeds varied depending on the fertilizer and was highest when N90P60K120 and N60P30K90 were applied in combination with two foliar feedings of Vympel 2 (0.5 l/ha) – 52.6 and 51.8 g, and Grow Amino (1 l/ha) – 50.0 and 48.6 g, while the lowest value of the studied indicator (40.4 g) was recorded in the variant without fertilizers. The heaviest sunflower yield (Hoduvalnik hybrid) in the conditions of Western Polissia was due to mineral fertilizer in a dose of N90Р60К120 and N60Р30К90 in combination with foliar feeding of plants with growth stimulators Vimpel 2 (0,5 l/ha) and Grow Amino (1 l/ha), which amounted to 2.91-3.18 t/ha, oil yield – 1.59-1.73 t/ha.
Key words: sunflower, fertilization system, growth stimulator, foliar feeding, productivity.
https://orcid.org/0000-0002-1343-097XReference:
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