Effect of complex growth regulating preparations on yield of winter wheat (Тriticum aestivum L.) grown after different precursors

This is the first time in conditions of Semisavanna of Ukraine when mutual effect of winter wheat precursors and three complex growth-regulating preparations on the growth, development and yield of winter wheat grain has been studied. It has been determined that Antistress, Mars-EL and four amino acid complex preparations can be used for winter wheat growing technology with the aim to increase its yield both during the naked fallow sowing, and after a grain precur- © Позняк В. В., 2019 sor. Greater effect is provided by preparations at winter wheat re-sowing - the yield increase made 0.32-0.81 t/ha. The less significant but stable increase in yield of 0.27-0.59 t/ha is provided by complex growth-regulating preparations during sowing wheat over wheat. Use of the studied complex preparations with a wide range of action throughout the growing season had a positive effect on indicators characterizing growth, development and formation of winter wheat yield. The most effective was the joint use of Antistress and Mars-EL preparations (0.5-0.71 t/ha increase) and all the three drugs together (Antistress + Mars-EL + amino acid complex) when additional 0.59-0.81 t/ha of grain was obtained. Thus, our research has shown that use of new promising growth-regulating agents for winter wheat growing technology makes it possible to implement its genetic potential and increase yield more efficiently, which undoubtedly is of a great importance for agricultural farms specializing in production of this crop.

winter wheat, precursors, autumn fallow, re-sowing of winter wheat, plant growth regulators, crop structure, number of plants per area unit, number of productive stems per area unit, productive tilling capacity of plants, 1000 grain mass, grain mass per spike, yield

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