Methods of increasing the productivity of white mus- tard in the conditions of the Middle Volga Region

   The results of the study of the use of microfertilizers and growth regulators to improve productivity and quality indicators of white mustard are presented. The research was conducted in the forest-steppe conditions of the Middle Volga region in 2019-2021. The use of biological preparations influenced the intensity of initial growth of mustard. The highest rates of mustard seeds growth force were noted in the variants with Izagri Vita and Megamix, the length of the seedlings significantly exceeded the control variant by 0.63-0.97 cm. These preparations stimulated an increase in seed germination by 2.66-2.98 % relative to the control (94.68%). Mustard yields averaged 1.39-1.59 t/ha over three years. The studied preparations contributed to an increase in productivity by 0.02-0.20 t/ha with respect to the control variant. The most effective are Izagri Vita and Agroverm, the use of which allowed to get an increase in the mustard yield by 0.17-0.20 t/ha. The highest oil content of seeds was observed in the variants with the growth regulators Albit (26.70 %) and Zircon (26.99 %), which was higher than the control variant by 1.44 and 1.73 %. Morphometric indices of mustard plants also changed depending on the application of the growth stimulants. The application of Zircon contributed to an increase in the plant height (up to 102.6 cm) and the formation of the highest number of pods per plant (194.1 pcs). The use of Agroverm allowed the formation of the maximum number of branches (10.3 pcs). The variants treated with Megamix and Humate +7 formed the largest seeds, the weight of 1,000 seeds was 6.82 and 6.79 g. All of the studied preparations contributed to a decrease in the percentage concentration of the linolenic acid to 9.56-10.28 %. Treatment with Agrika maximizes the content of erucic acid to 36.20 %, with Zircon - oleic acid to 31.20 % and reduces the concentration of linoleic and linolenic acids by 8.0 and 1.52 %. The use of microfertilizers and growth regulators can act as methods of increasing the productivity of white mustard.

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