Agriculture and forestry

Serbin Yevhenii Oleksandrovych – graduate student of the Department of Plant Breeding and Horticulture of the Vinnytsia National Agrarian University (21008, Vinnytsia, 3 Sonyachna Street. email: Ap.nt1982@gmail.com, https://orcid.org/0009-0002-0731-155X).

An assessment of organic Brussels sprout cultivation technology in open ground and its productivity is presented. Scientific observations were conducted in 2023-2025 in open ground conditions on Brilliant F1, Abacus F1, Diablo F1 hybrids and Rosella and Cassiopeia varieties. Seedlings were planted in rows according to a 70x50 cm pattern in the second decade of May. During the research, organic technology for growing Brussels sprouts was used, which included the use of BTU bacterial biological products, namely: to combat bacterial diseases and fusarium wilt, Phytohelp (2 l/ha twice during the vegetative growth phase) and Mycohelp (3 l/ha twice during the product organ growth phase) were used to combat bacterial diseases and fusarium wilt, while Actoverm formula (5 l/ha every 14 days during the vegetative mass growth and product organ growth phases) and biological stimulants Organic Balance 0.5 l/ha + Liposam 0.3 l/ha (application at intervals of 10-15 days during the phase of vegetative mass growth and growth of the product organ). Plants of the Rosella variety and the Diablo F1 hybrid, which were not treated with biological products, served as controls. Organic technology affects the biometric indicators of plants: it promotes the formation of more leaves on plants of the Brilliant F1 and Abacus F1 hybrids by 8-10 pieces; positively affects the diameter of the plant rosette in the Abacus F1 hybrid and Cassiopeia variety; the height of Brilliant F1 and Abacus F1 hybrid plants increases by as much as 6 cm. With proper plant protection and appropriate growth stimulation in organic cultivation, the largest head weight can be obtained for the Abacus F1 hybrid (8.9 g) and the Cassiopeia variety (8.8 g), and the head weight of the Brilliant F1 hybrid can increase by 2%. When growing the Rosella and Cassiopeia varieties, the number of heads per plant is higher than for hybrids. Organic Brussels sprout cultivation technology ensures the formation of the largest number of edible organs, namely 50 and 33 per Cassiopeia variety and Abacus F1 hybrid, respectively. Organic cultivation contributes to the highest yield of Brussels sprouts for the Cassiopeia variety and the Abacus F1 hybrid, where the yield can be 12.5 and 8.4 t/ha. The Rosella and Cassiopeia varieties (90-95%) and the Brilliant F1 (87%) and Abacus F1 (88%) hybrids are characterized by high marketability, with marketability increasing by 3-5%.  Adherence to this technology contributes to obtaining a high dry matter content in Abacus F1 and Brilliant F1 hybrids, with a value of 15.00-15.79%. Among the varieties, Cassiopeia is characterized by a high dry matter content, which can increase by 1.2 times, and the Abacus F1 and Brilliant F1 hybrids and the Cassiopeia variety are characterized by high protein and sugar content in the edible parts of Brussels sprouts. The proposed technology increases the protein content by 0.03% and the sugar content by 0.1-0.3% during the cultivation of these hybrids, and by 1.3 and 1.2 times, respectively, for the Cassiopeia variety. 

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