Uman National University | today: 06/27/2025
| Author(s) |
Lubych V.V., Candidate of Agricultural Science, Lecturer of Department of Technology of Storage and Processing of Grain, Uman National University of Horticulture, Ukraine Стоцький О. В., , , |
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| Category | The Agronomy | ||
| year | 2025 | issue | Issue 106 Part 1 |
| pages | 126-133 | index UDK | 664.314-047.44:633.9]:631.816 | DOI | 10.32782/2415-8240-2025-106-1-126-133 (Link) |
| Abstract | Objective. To determine the formation of oil content and its yield from sunflower seed harvest depending on fertilization practices. Methods. Field experiments, measurements, comparative-calculative analysis, analytical and statistical methods. Results. The oil content in sunflower seeds showed a slight decreasing trend with the application of mineral fertilizers. However, this decrease was statistically insignificant. On average over three years, oil content in the unfertilized control was 45.5%, compared to 44.1–44.6% under mineral fertilization. Foliar application of boric acid helped maintain oil content at 45.1–45.2%. Regarding oil yield, the use of N60 in the fertilization system proved most effective. The N60P60K60 combination provided an oil yield of 2,243 kg/ha, while nitrogen-paired combinations yielded 2,089–2,175 kg/ha (4–7% less). Increasing the nitrogen dose to N90–120 did not result in a significant increase in oil yield. Foliar application of boric acid increased oil yield to 2,338–2,395 kg/ha (4–7% more), comparable to that under N90–120. Oil yield varied significantly across research years: the highest was in 2023 (2,211–2,610 kg/ha), and lower in 2024 (1,438–2,179 kg/ha), due to variations in sunflower yield. Conclusions. Phosphorus-potassium fertilization had the least impact on seed yield (4.15 t/ha). Foliar boron application increased seed yield by 9–15% compared to untreated plots. Fertilizer use slightly reduced oil content in seeds, but not significantly. Foliar boron maintained oil content at levels comparable to unfertilized variants. The N60P60K60 application resulted in an oil yield of 2,243 kg/ha, while N120P60K60 increased it to 2,323 kg/ha (+4%). Based on the findings, N60P60K60 is an effective dose in sunflower agrotechnology, with optional temporary application of nitrogen-only fertilizers. | ||
| Key words | sunflower, yield, oil content, oil yield, fertilization. | ||