Yield and biochemical composition of oilflax new varieties seeds under the Sverdlovsk region conditions

The purpose of research is to compare the productivity of new varieties of oil flax, to substantiate the yield value by elements of the crop structure and to determine the quality of seeds based on their biochemical composition. The work used the method of field experiment with analysis of variance of experimental data. 10 varieties of oil flax were grown on gray forest heavy loamy soil with the agrochemical characteristics of the arable layer: pHsol. - 4.68, humus - 3.35 %, Nl.g. - 13.1 mg, Р2О5 - 17.3 mg, К2О -11.4 mg/100 g soil, Ng - 6.47 mmol/100 g, S - 22.5 mmol/100 g soil. It was established that in the dry year 2021 and favorable for oil flax 2022, the yield of the varieties Ural'skij, VNIIMK 620 FN, Avgust, Rachel and Lirina exceeded 2 t/ha. The RFN, Fliz, Severny and Serpent varieties turned out to be less productive in the conditions of the Sverdlovsk Region. With a seeding rate of 8 million seeds, all varieties provided good sowing density before harvesting - 465-498 pcs/m2. The agrophytocenosis of oil flax was dominated by plants with one stem and 9.6-13.0 pieces. boxes containing from 56.7 to 84.0 pcs. seeds, and their weight was 0.40-0.68 g. According to the main indicators of seed productivity, the varieties Ural'skij, Ural'skij zheltyj, Avgust and Lirina are distinguished. The varieties Ural'skij, VNIIMK 620 FN, Fliz, Severny and Rashel formed the largest seeds weighing 1000 pcs. more than 7 grams. There were no significant differences between varieties in the content of crude fiber, ash, phosphorus and potassium in the seeds. In 2021-2022 the oil content of the seeds was 44-47 %, and the yield of crude fat per 1 ha for the Ural'skij l, Avgust and Lirina varieties exceeded 1 ton.