Сравнительная оценка баковых смесей гербицидов при возделывании масличного льна на черноземе выщелоченном Западного Предкавказья

Abstract

Potential yield of the modern oil flax varieties is up to 2.5–3.0 t/ha, but in fact, in 2020, its average yield was equal to 0.81 t/ha in the Russian Federation and 0.86 t/ha тin the Southern federal district. One of the reasons of such low productivity of the crop is non-effective protection of sowings against weeds. We studied impact of tank mixtures of herbicides Tifi, WDG (0.025 kg/ha) + Miura, CE (1.2 l/hа); Magnum, WDG (0.01 kg/hа) + Miura, CE (1.2 l/hа); Sekator Turbo, OD (0.1 l/hа) + Miura, CE (1.2 l/hа) and Sekator Turbo, OD (0.1 l/hа) + Quickstep, OCE (0.8 l/hа) on oil flax productivity (the variety FLIZ bred at the V.S. Pustovoit All-Russian Research Institute of Oil Crops). The researches were conducted in a zone of unstable moistening on leach black soil of the Western Ciscaucasia in 2017–2020. Recommended doses of tank mixtures of the herbicides were applied in a phase of 5-6 pairs of leaves development of oil flax plants. In spite of the good water availability in years of the research, high air temperatures during flowering – seeds formation negatively influenced the crop productivity. Due to our results, on average for four years, treatment of oil flax plants with a tank mixture of the herbicides Sekator Turbo, OD (0.1 l/hа) + Quickstep, OCE (0.8 l/hа) allowed obtaining the highest yield – 1.17 t/hа, oil content in seeds – 45.5% and oil yield – 0.47 t/hа; there was fixed the high clear profit – 13,861 RUR/hа at profitability of 51%.