Uman National University | today: 12/25/2025
| Author(s) |
Cherno O.D., Candidate of Agricultural Science, Associate Professor of Department of Agricultural Chemistry and Soil Science, Uman National University of Horticulture, Ukraine Сутик О. В., , , |
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| Category | The Agronomy | ||
| year | 2025 | issue | Issue 107 part 1 |
| pages | 439-444 | index UDK | 631.547.2:633.9]:631.81 | DOI | 10.32782/2415-8240-2025-107-1-439-444 (Link) |
| Abstract | Objective. To determine sunflower plant growth under different scenarios of micronutrient application against the background of base nutrient supply. Results. The study results indicate that the application of base nutrients and micronutrients influenced the height of sunflower plants. On average, over three years of research, the plant height in the control variant without fertilizers was 155 cm and increased to 159 cm with the application of N30P30K30 (+3%) and up to 166 cm (+7%). It should be noted that the use of micronutrients and the Vimpel 2 preparation, applied separately or in combination, resulted in plant heights of 164–165 cm, comparable to the variant with complete mineral fertilization. Sunflower plant height varied throughout the years of study. The tallest plants were recorded in 2023 (175–186 cm), in 2025 (166–178 cm), and in 2024 (125–135 cm), depending on the experimental variant. Seed mass per plant varied even more significantly. On average over three years, this indicator increased from 63.3 g in the control variant to 79.3–86.2 g with the application of N30–60P30K30 (+25–36%). When micronutrients and Vimpel 2 were applied, seed mass increased to 78.7–83.2 g (+34–34% compared to control). The highest seed mass per plant was observed in 2023 and 2025 (67.2–96.0 g) and in 2024 (51.6–72.2 g), depending on the fertilization scenario. Seed mass per 1 cm of stem length also increased with fertilizer application. In the control variant, it was 0.41 g/cm, whereas with fertilization it reached 0.49–0.52 g/cm. When micronutrients were applied, the seed mass per 1 cm of stem was comparable to the N30P30K30 variant. Conclusions. Sunflower plant growth depends on the weather conditions of the growing season. Plants respond well to the application of various types of fertilizers. Plant height can range from 125–175 cm to 128–186 cm, and seed mass per plant from 51.6–71.0 g to 68.2–96.0 g, depending on fertilization scenarios and weather conditions. The seed mass per 1 cm of stem ranges from 0.38–0.54 g/cm depending on the experimental variant. | ||
| Key words | sunflower, micronutrients, base nutrients, complete mineral fertilizer, foliar fertilization | ||