Abstract
The paper presents results of studying the effectiveness of a complex of organic fertilizers (straw, green manure, biological product) in the technology of winter wheat cultivation. Experimental field studies were carried out on the experimental field of Ulyanovsk State Agrarian University in 2018 - 2020 in a five-field grain-green manure crop rotation: green manure fallow - winter wheat - millet - spring wheat - barley. The experiment scheme included 6 variants: 1. Control, 2. Forecrop straw (barley) + green manure (vetch-oat mixture), 3. Straw + 10 kg N / t straw + green manure, 4. Straw + biological product + green manure, 5. Biological product + green manure, 6.N64P32K54 (NPK). The experiment was carried out in a 4-fold repetition with a randomized placement of plots, the record area of which was 72 m2 (4x18), total - 120 m2 (6x20). Mineral fertilizers are calculated for the planned yield of winter wheat of 4.5 t / ha. “Biocomposite-correct” product produced by AO Shchelkovo Agrokhim was used as a biological fertilizer. The experiment focused on the change of soil agrochemical parameters (typical medium-thick medium-loamy black soil) depending on application of fertilizers, grain yield, its quality and environmental safety; economic assessment of winter wheat cultivation technology with application of fertilizers was conducted. A significant improvement of the soil nutrient regime was found in case of application of a complex of organic methods, which was slightly inferior to the variant with full fertilization. The yield increase of winter wheat grain in case of combined usage of straw, green manure and a biological product was 0.67 t / ha (control - 5.83 t / ha). The usage of a complex 80 of biological techniques for winter wheat cultivation is environmentally safe and cost effective.
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