The article presents the results of field studies to study the effectiveness of biological preparations based on associative microorganisms in the crops of winter triticale on ordinary chernozem in 2012-2015 years. The method of application of biological preparations is pre-sowing inoculation of seeds. The experimental design included studies on a natural background and when nitrogen fertilizers were applied at a dose of 30 kg/ha of the active substance. According to the results of four years of research, the high efficiency of the use of biological products for presowing treatment of seeds of winter triticale in the conditions of the southeast of Central Chernozemic Area is shown. The productivity of winter triticale increased on average by 1.5-5.5 c/ha. The maximum yield growth was detected using strain 18-5. Mineral fertilizers in the form of nitrogen at a dose of N30 in combination with presowing inoculation of seeds did not contribute to a stable increase in the productivity of cultivated crops. In the technologies of cultivation of winter triticale, it is possible to exclude presowing introduction of nitrogen at a dose of N30 and replace it with biological products based on associative microorganisms.
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