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Authors:

T. V. NEUPOKOEVA, candidate of agricultural sciences, associate professor,

TYUMEN STATE OIL AND GAS UNIVERSITY (38 Volodarskogo Str. 625000, Tyumen)

Abstract. Among the factors that reduce the yield of field crops, its quality, and productivity of labor, the dominant place is occupied by weeds. One of the most important provisions increasing the production of grain is a planned and systematic weed control, because weeds consume large amounts of nutrients, moisture, light, and cause extensive damage to crops. The research is devoted to the integrated study of the effect of long-term main ways of tillage (moldboard, moldboard-less, differentiated, surface and zero ones) of leached black soil and herbicides on the dynamics of weed infestation of spring wheat. Tillage of various depth was conducted for scientific experiment: surface tillage at 14–16 cm, deep tillage at 28–30 cm, and zero tillage. Weed infestation in spring wheat crops was taken into account before an early spring harrowing; before sowing crops; before application of herbicides; one month after treatment with herbicides; before harvesting crops; before leaving in winter after the main soil treatment. The use of tank-mix herbicides Puma Super 100 and Secateur in the tillering stage of spring wheat reduced weeds by 90.0–91.0 %. Dynamics of weediness of spring wheat depend on the systems of main tillage and application of herbicides. In the conditions of forest-steppe of the Tyumen region, the differentiated deep tillage by 28–30 cm, and the chemical weeding of crops by tank-mix herbicides Puma Super 100 + Secateur (anti-cereal and anti-dicotyledonous) are recommended to decrease the weed forming young type of weed infestation. The productivity of this treatment was 3.90 tons of control items per ha in crop rotation and crop capacity 4.19 t/ha.

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