Justification of agrobiological parameters for winter garlic cultivation in organic production

The results of improving the elements of winter garlic cultivation technology in the conditions of the Ivano-Frankivsk region through the application of fertilizers to enhance quality and yield are presented.The study focused on fertilizing winter garlic varieties Lyubasha and Kharkivskyi fioletovyi.The research showed that fertilization positively influenced the phenological phases, growth, and development of plants, increased biomass, and improved yield.It was proven that achieving high yields depends on proper fertilization.In terms of crop structure, the best results were achieved with the combined application of green manure and the preparation Sizarin Ultra, which ensured a bulb weight of 95.6 g, a clove weight of 18.4 g, while maintaining a clove count of 5.2 per bulb.A similar effect was observed with the use of the growth regulator Profi-K, which increased productivity almost to the level achieved with green manure (bulb weight -89.8 g, clove weight -17.6 g, clove count -5.1 per bulb).The maximum indicators for the Lyubasha variety were obtained through the combination of green manure with Profi-K: bulb weight was 95.7 g, clove weight -18.4 g, and clove count -5.2 per bulb.For the Kharkivskyi fioletovyi variety, the indicators were lower compared to Lyubasha.In the control group, the bulb weight was only 26.1 g, clove weight -5.8 g, and the clove count per bulb -4.5.The use of green manure positively affected these indicators: bulb weight increased to 35.3 g, clove weight to 6.3 g, and clove count rose to 5.6 per bulb.It was established that the combination of green manure and Profi-K produced the highest results throughout the research period.The yield of the Lyubasha variety increased to 12.55 tha -1 , providing a gain of 3.9 tha -1 (40.4%) compared to the control, while the yield of the Kharkivskyi fioletovyi variety reached 10.11 tha -1 (+2.46 tha -1 , or 32.2%).This fertilization combination proved to be the most effective both for increasing yields and ensuring stable results over the years of research.