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Warning: count(): Parameter must be an array or an object that implements Countable in bootstrap_table() (line 238 of /var/www/html/sites/all/themes/bootstrap/templates/system/table.func.php).Formation of yield of winter rapeseed varieties depending on seeding rates under the conditions of LLC «Agrosland», Bila Tserkva district, Kyiv region
The article presents the results of two-year field experiments (2024–2025) conducted at LLC «Agrosland» in Bila Tserkva district, Kyiv region on typical medium loamy black soil. The aim of the study was to perform a comparative evaluation of the winter rapeseed variety Atlant and the hybrids Mercedes and Exaited under different seeding rates (0.4, 0.6, and 0.8 million seeds per hectare) in order to determine optimal productivity parameters and ensure maximum oil yield per hectare. The experiment was established according to a twofactor design with four replications. Field emergence averaged 88.8–91.6 % and depended mainly on weather conditions. The highest winter hardiness was recorded for the hybrid Exaited. The maximum leaf area (110.4 thousand m²/ha) was formed by Exaited at a seeding rate of 0.6 million seeds/ha. Seed yield in 2024 exceeded that of 2025 due to spring frosts and lower precipitation in the latter year. On average over two years, the highest yield (3.98 t/ha) was obtained from Exaited at a seeding rate of 0.6 million seeds/ha, while the variety Atlant showed maximum productivity at 0.8 million seeds/ha. Oil content was only slightly affected by seeding rate and was higher in the hybrids (up to 45.5 %). The erucic acid content met the standards for food-grade rapeseed. The highest economic efficiency (net profit of UAH 28,830 per ha; profitability of 137 %) was achieved when growing Exaited at a seeding rate of 0.6 million seeds/ha. Under the soil and climatic conditions of Bila Tserkva district, the hybrid Exaited at this seeding rate is recommended for cultivation.
Key words: winter rapeseed, hybrid, seeding rate, yield, oil content, economic efficiency.
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