Formation of the Yield of Flax Seeds of the Oilseed Variety LM 98 during Inoculation with New Strains of Microorganisms of the Rizobakt Biological Product of the RZhF Brand in the Conditions of the Leningrad Region

Abstract

In 2019 and 2020 on a small experimental field of the Department of Plant Industry named after I.A. Stebut FGBOU VO St. Petersburg State Agrarian University, studies were carried out to study the effect of new strains of microorganisms of Rizobakt biological products of RZhF brand on the growth, development and productivity of oil flax (Linum usitatissimum L.) variety LM 98. The research results showed that in the conditions of the Leningrad region on soddy-calcareous soil and with natural moisture, in order to obtain a stable seed yield at the level of 3.0 t / ha, it is recommended to inoculate oil flax seeds with the preparation Rizobakt of the RZhF brand (strain M) or Rizobakt of the RZhF (strain Sl), which will increase this indicator by 0.4 t/ha or 17%. The studied agrotechnical method stimulates seed germination, increases field germination by 8-30%, adaptation of crops planting to extreme environmental conditions is manifested, increasing the survival rate of plants for harvesting by 10-12%. This contributes to creation of flax stalks with a large (by 22–42%) number of plants per unit area before harvesting. In thickened agrophytocenoses, which are formed under the influence of biological products, in flax plants of the LM 98 variety, 18-19% fewer bolls are formed, seeds–by 15–17% and their weight is less by 10–18%.