Research is devoted to the study of the assortment of lettuce seeded under hydroponics conditions. The survival rate of lettuce plants depended on the type and variety, and also differed to a certain extent by the terms of sowing. Plants of the Aficion variety of leaf lettuce (control) had the highest percentage of engraftment - 98.1%, which is 0.6 and 3.7% more compared to other variants of the experiment. Plants of the Raphael variety had a higher survival rate in romaine lettuce – 97.9%, which is 1.4% more than the control variant. Among the varieties of romaine lettuce, plants of the Maximus variety (control) had a higher height – 16.1 cm, which is 3.8 cm more than the Raphael variety. Comparing leaf lettuce plants, the highest height was noted in the Aficion variety (control) – 13.3 cm, which is 0.9 and 1.8 cm more than the other tested variants. In romaine lettuce, a larger diameter of the rosette was noted in the Maximus variety – 25.2 cm, which is 9.1 cm more than the Raphael variety. Among the leaf-type lettuce varieties, the largest diameter of the rosette of leaves was characterized by plants of the Aficion variety (Batavia type) – 28.3 cm, which is 4.0 and 7.9 cm more than the other studied variants of the experiment. In romaine lettuce, plants of the Maximus variety were characterized by a greater mass of the above-ground part – 210 g, which is 80.0 g more than the Raphael variety. Among the varieties of leaf lettuce, the Kirinia variety had the largest mass – 200 g, which is 60.0 more than the control variant. Mr. Maximus variety romaine lettuce had the highest yield – 9.3 kg/m2, and in terms of rows – 37.0 kg/m2, which is 14.1 kg/m2 more than the Raphael variety. Among the leafy types of lettuce, plants of the Kirinia variety were characterized by a higher yield – 8.8 kg/m2, in terms of rows – 35.2 kg/m2, where the increase compared to the control was 10.6 kg/m2. The yield of different types of lettuce ranged from 158.4 t/ha to 369.6 t/ha, taking into account the rows of racks. The highest yield, taking into account the tiering of racks, was obtained by growing Maximus (romaine type) – 369.6 t/ha and Kirinia (oak type) – 352.0 t/ha with an increase of 42.9 t/ha compared to the control variant
type, variety, cultivation, biometric parameters, yield
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