Determining the Yield Level of White Cabbage Hybrids Under Integrated Cultivation Technology for Yield Forecasting and Planning

Purpose. To determine changes in growth, development, and productivity parameters of white cabbage hybrids under integrated cultivation approaches in open field conditions of the Forest-Steppe zone of Ukraine. Methods. The study was conducted under production conditions in Poltava region (Private Enterprise «Gutman I.V.», Kremenchuk district) on typical low-humus chernozem soil. The experiment involved cultivation of various white cabbage hybrids (Professor F1, Novator F1, Jintama F1, Aggressor F1) at a planting density of 33.3 thousand plants per hectare, using drip irrigation, intensive nutrient optimization, and plant protection. Results. The article presents research findings on the growth, development, and productivity parameters of plants, as well as the marketable yield of different white cabbage hybrids in the Forest-Steppe zone of Ukraine under integrated cultivation approaches. Conclusions. Phenological observations of the studied late-maturing foreign-bred white cabbage hybrids indicated minor differences in the duration of developmental phases among the hybrids. The first true leaf appeared on average 10–12 days after planting, and the second one appeared 14–16 days after planting-approximately four days after the first. The hybrids demonstrated intensive head mass accumulation. Leaf production ceased in the second ten-day period of September, with no significant differences among hybrids. The highest number of leaves was observed in the Jintama F1 and Aggressor F1 hybrids, ranging from 23 to 24 leaves per plant. During the vegetation period, intensive head formation was recorded. At harvest, head diameters ranged from 19.3 to 21.1 cm in 2023 and from 25.0 to 28.3 cm in 2024. The largest head diameters were recorded for the Jintama F1 and Aggressor F1 hybrids. The highest productivity among late-maturing white cabbage was also noted in these hybrids, amounting to 4.102–4.8 kg per plant. High yield levels were observed for Jintama F1 and Aggressor F1, reaching 135.37–155.79 t/ha and 138.66–158.4 t/ha in 2023 and 2024, respectively. These results support recommending these hybrids for cultivation in the Forest-Steppe zone of Ukraine.