PRODUCTIVITY OF NEW CORN HYBRIDS ON LEACHED CHERNOZEM OF THE FOOTHILL ZONE OF KABARDINO-BALKARIA DEPENDING ON THE RATES OF FERTILIZERS APPLICATION

Abstract

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-eq per 100 g 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 452 AMV to 9.69 t/ha, Krasnodarskiy 507 AMV – 9.75 and Krasnodarskiy 575 AMV to 101.4 c/ha – 9,75.