Productivity of new corn hybrids on leached chernozem of the foothill zone of Kabardino-Balkaria depending on the rates of fertilizers application

The article presents data on yield of the corn hybrids of different ripening periods depending on the doses of Organomix + N₃₀P₉₀, Liquid complex fertilizer + N₃₀P₁₀₀ and poultry manure in the foothill zone of Kabardino-Balkaria. In order to establish the effectiveness of new fertilizers doses for corn hybrids, field experience was laid in 2017—2018 in the foothill zone on the territory of the scientific-experimental complex of the Kabardino-Balkarian State Agrarian University. The experimental plot soil refers to leached chernozem, the humus content in the arable layer is 4—5.5%, total nitrogen is 0.2—0.31%, the absorption capacity is 30—40 mg-eqper 100g of soil, the arable layer density — 1.1—1.2 g/cm³, mobile phosphorus — 10—20 mg per 100 g of soil, exchangeable potassium — 30—70 mg per 100 g of soil, the soil solution reaction is neutral — pH-7. New perspectives corn hybrids were selected for research: Krasnodarskiy 452 AMV, simple averagae-late hybrid (FAO 450), Krasnodarskiy 507 AMV, late-ripe hybrid (FAO 530), Krasnodarskiy 575 AMB, late-ripe hybrid (FAO 570). The combined application of these organomineral fertilizers and a biopreparation was increased the yield of corn hybrids Krasnodarskiy 452AMV to 9.69t/ha, Krasnodarskiy 507AMV— 9.75andKrasnodarskiy 575AMV to 101.4c/ha — 9,75.