Научный журнал

The study of productivity formation of the early-maturing Uralskiy and late-maturing LM 98 varieties was carried out in the Northern part of the Central non-Chernozem region in 2016-2019 on soddy-podzolic medium loamy soil with a high content of phosphorus, medium - potassium and boron, low - humus and zinc. The effectiveness of the application of the mineral fertilizer azofoska and new flax fertilizer sontained nitrogen-phosphorus-potassium with boron on the productivity of oil flax was evaluated. Also in the experiment, with the background of a reduced dose of azofoska, an organomineral microfertilizer based on seaweed was used for seed treatment (Sivid-Boron (B)) and seeding foliar (Sivid-Zinc (Zn)). At the time of formation of seed productivity (July) for all years of the study, hydrothermal coefficient was higher than the optimal - from 1.60 to 2.52. The use of nitrogen-phosphorus-potassium fertilizer with boron (NPKB) is more effective on oil flax. The increase in the yield of flax seeds was 0.34 t/ha for the LM 98 variety and 0.23 t/ha for the Uralskiy variety. High efficiency of organomineral microfertilizers for seed treatment (Sivid-B) and seeding (Sivid-Zn) against the background of a reduced dose of azofoska (NPK) was noted. The increase in seed yield was 0.29 and 0.28 t/ha, respectively, for varieties in comparison with variant without fertilizers. The yield of seeds and flax straw in all the years of testing of the late-maturing of the variety LM 98 was on average 0.41 t/ha higher than that of the early-maturing variety Uralskiy. The increase in seed yield in this variety was due to the larger number of seeds in the box, and flax straw due to the greater height of the plants. The Uralskiy variety in the Northern part of the Central non-Chernozem region did not show the declared productivity.