Uman National University | today: 12/25/2025
| Author(s) |
Гетман Н. Я., , , Данилюк Б. М., , , |
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|---|---|---|---|
| Category | The Agronomy | ||
| year | 2025 | issue | Issue 107 part 1 |
| pages | 574-582 | index UDK | 633.31: 631.8 | DOI | 10.32782/2415-8240-2025-107-1-574-582 (Link) |
| Abstract | The article examines the influence of different rates of mineral phosphorus–potassium fertilizers supplemented with microelements on the productivity of alfalfa agrocenoses. The results of two-year field studies are presented, demonstrating the effect of fertilizer doses and seeding rates on the yield of green mass during the first and second years of vegetation. Yield distribution by cuts and daily biomass accumulation dynamics were analyzed depending on the fertilization background. It was found that when alfalfa was cut at the budding stage, the distribution of green mass yield across the first, second and third cuts amounted to 56.2%, 22.2% and 21.6%, respectively. The highest biomass accumulation occurred during the first cut under long-day conditions (about 16 hours of daylight), which is typical for this light-loving species. The second and third cuts, formed within 37–38 days of regrowth, ensured an average green mass yield of 15.3–16.3 t/ha. The highest productivity (16.2–17.0 t/ha) was recorded under both seeding rates with the mineral fertilization dose N₃₅P₉₀K₁₅₀ + S23.5Ca30Mg20. Differences in biomass growth between the second and third cuts reached 10–25 kg/ha per day regardless of fertilization or seeding rate. It was established that the Radyslava variety demonstrated high adaptability under varying hydrothermal conditions of the sowing year and the second year of growth, providing stable yields in all cuts. Thus, in the conditions of the Right-Bank Forest-Steppe of Ukraine, due to the combined action of abiotic and biotic factors, the studied variety showed high adaptability, forming a total green mass yield of 74.9–76.4 t/ha in the budding phase during the second year of use under optimal seeding rate and 12.5-cm row spacing. | ||
| Key words | alfalfa, budding stage, seeding rate, mineral fertilizers, productivity, green mass | ||