Uman National University | today: 12/25/2025
| 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 107 part 1 |
| pages | 559-565 | index UDK | 57.087.1:633.9]:631.816 | DOI | 10.32782/2415-8240-2025-107-1-559-565 (Link) |
| Abstract | Aim. To determine the formation of individual productivity of sunflower plants under different fertilizer doses and their combinations. Methods. Field, measurement, calculation-comparative, analytical, statistical. Results. Over three years of research, the 1000-seed weight was on average the lowest at 47.9 g. The application of N60 increased this indicator to 53.0–53.4 g, or by 10–11%. Similar effects were observed with the use of phosphorus and potassium fertilizers. Increasing nitrogen fertilizer doses to 90–120 kg/ha of active ingredient, conversely, reduced the 1000-seed weight to 50.4–48.5 g, although this value remained higher than in the control. On average, over three years, seed weight increased from 50.8 to 55.2 g with the application of phosphorus and potassium fertilizers. The use of N60–120 in the sunflower fertilization system increased seed weight to 67.2–70.1 g, or by 32–38% compared to unfertilized plots. Increasing potassium fertilizers to K90 increased seed weight per plant by only 1% compared to N60P60K60. Foliar application of boric acid at different plant growth stages did not show a significant advantage compared to fertilization without foliar feeding. Over three years, seed number increased to 1190–1442 per plant under 60–120 kg/ha N fertilization, or by 13–37% compared to the control (1050 seeds). Boric acid application did not significantly affect seed number per plant. The use of phosphorus and potassium fertilizers led to a reduction in seed number due to an increase in 1000-seed weight and seed weight per plant. Conclusions. Nitrogen fertilization significantly increases the individual productivity indicators of sunflower plants. Phosphorus and potassium fertilizers have the least effect on these indicators. Foliar application of boric acid does not significantly change individual plant productivity, although it shows a tendency to improve it. | ||
| Key words | 1000-seed weight, seed weight per head, seed number per head, fertilization, foliar feeding | ||