Uman National University | today: 12/31/2025
| Author(s) |
Kononenko L.M., Candidate of Agricultural Sciences, , Uman National University of Horticulture, Ukraine Михайловин Ю. М., , , Poltoretska N.M., Candidate of Agricultural Sciences, , Приходько В. О., , , |
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| Category | The Agronomy | ||
| year | 2025 | issue | Issue 107 part 1 |
| pages | 611-619 | index UDK | 633.854:631.527 | DOI | 10.32782/2415-8240-2025-107-1-611-619 (Link) |
| Abstract | The aim of the study was to determine the effect of varietal characteristics and sowing dates on the productivity of winter turnip rape cultivars Ramira and Oriana under the conditions of the Right-Bank Forest-Steppe of Ukraine. The research was conducted during 2020–2024 at Uman National University of Horticulture. Two winter turnip rape (Brassica campestris var. oleifera f. biennis D.C.) oil-type cultivars, Ramira and Oriana, bred by the M. M. Gryshko National Botanical Garden of the National Academy of Agrarian Sciences of Ukraine, were studied (factor A). The cultivars were sown at four sowing dates (factor B): the first decade of August, the third decade of August, the first decade of September, and the third decade of September. The experiment was arranged in three replications. The results of the study showed that sowing the winter turnip rape cultivar Ramira in the first decade of August ensured high yields of green biomass (42.00 t ha⁻¹) and seeds (3.50 t ha), high oil content (40.0%), oil yield coefficient (38.5%), oil yield per hectare (1340.0 kg ha⁻¹), as well as increased contents of crude protein (3.0%) and lipids (5.2%). Shifting the sowing date to the third decade of September led to a significant decrease in all productivity indicators of both winter turnip rape cultivars Ramira and Oriana, while providing a statistically significant increase in crude fiber content (16.8–17.5%). The cultivar Oriana was characterized by significantly lower productivity parameters (seed yield 2.00–2.40 t ha, thousand-seed weight 2.28–2.35 g, oil content 32.5–35.0%); however, it demonstrated a clear tendency toward increased productivity when sown in the first decade of August. Early sowing dates ensured maximum seed yield, whereas varietal differences were manifested in the absolute level of productivity and stability of the traits. Sowing in the first decade of August provided the highest seed yield, greater thousand-seed weight, and optimal moisture content, which contributed to improved product quality. | ||
| Key words | yield, oil content, green biomass, protein, lipids, fiber. | ||