Efficiency of herbicides application on barley depending on the soil tillage

Abstract

The effect of the use of herbicide mixtures on the reduction of weeds and preservation of barley yield was studied. The experiment (2018–2019) was carried out on dark gray forest soil in the foreststeppe conditions ofTyumenregion. The experiment included two types of basic tillage: moldboard (plowing with a Lemken rotary plow at 20–22 cm) and non-moldboard (tillage with a Smaragd unit at 12–14 cm). The object of research was spring barley, Abalak variety. Biological effectiveness of herbicides, regardless of the soil tillage system, was 94–97% against dicotyledonous weeds, and 80–100% – against cereal and perennial weeds. Efficiency against the entire weed component reached 95–97.5% in 1 month after the application of herbicides, and 96–99% at the end of the growing season. The effectiveness of the use of preparations against cereal weeds was 80–90%, and the effectiveness of herbicides against dicotyledonous weeds – 97–99%. The reduction in the mass of weeds was 90–99%, mostly due to non-moldboard soil tillage. The yield level in the years of research largely depended on the soil tillage with a difference of 0.3–0.4 t in favor of moldboard system and the complex of herbicides applied. A high increase in the yield was provided by a mixture of herbicides Esteron, Speaker + Avantix Extra, Primadonna + Granat + Ovsyugen Super, which amounted to 1.16–1.22 t/ha. The application of comprehensive protection means increased the grain harvest by 1.7 t/ha.