Abstract
This article presents the results of scientific research on the application of growth-stimulating agents in pre-sowing treatment of seeds and soybean crops by development phases in the forest-steppe conditions of the Middle Volga region. Results of researches for 2016-2018 with estimation of indexes of saving of plants, photosynthetic activity and yield of soybean at different variants of treatment of crops with growth stimulants are resulted. The use of two-component preparations in the pre-sowing treatment of seeds contributes to better completeness of shoots, the safety of plants to harvesting 61.82%. The maximum leaf area is formed in a phase of soybean blossoming and is in the range of 38.6...51.2 thousand m2/ha. Seed treatment with MegamixSemena and its mixture with Rizotorfin only slightly increases the yield (by 0.03...0.05 t/ha). The use of stimulants in the treatment of soybean crops provides a significant increase of 0.10 to 0.18 t/ha. The maximum yield of 1.62 t/ha is formed on the variant of treatment of crops by MegamixProfi against the background of treatment of seeds by mixture MegamixSemena + Risotorfin.
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