Застосування препарату регоплант у зрошуваних умовах південного степу України на кукурудзі цукровій

Abstract

The article is devoted to the study of the influence of the growth-regulating drug Regoplant on the productivity and growth processes of sugar corn in the conditions of the Southern Steppe of Ukraine on dark chestnut soils under irrigation. The aim of the work was to formulate current recommendations for agricultural producers on the use of the growth-regulating drug Regoplant, the selection of hybrids and the scheme of sowing sugar corn, based on the results of field experiments. Materials and methods. Studies to study the effect of the Regoplant preparation, the hybrid composition and the schemes of sowing sugar corn on the productivity of the crop were carried out on dark chestnut slightly solonetzic soils in the Kherson region. The experiment was carried out in four repetitions, in full accordance with modern requirements for the implementation of field experiments in agronomy. Regoplant preparation was used at a dose of 50 ml / ha in the phase of 7-8 leaves. The modern hybrids of the MNAGOR selection - Deyneris F1, Champion F1, NBM-2020 F1 were put to the study. Sowing patterns of the culture - 70 × 10 cm, 70 × 20 cm, 45 × 20 cm, 45 × 30 cm. Growth processes were assessed by the height of the plants in the panicle flowering phase, the crop yield was determined by the mass of marketable ears in wrappers collected from the experimental plot manually and weighed on an electronic analytical balance. Statistical processing of research results was performed at 95 % confidence level in the AgroStat software product. Results. All studied factors influenced the growth processes and productivity of sweet corn. The highest height (185.50 cm) of the crop plants was reached in the variant with the Daenerys F1 hybrid, where the treatment with the Regoplant preparation was not performed, with a seeding pattern of 45 × 30 cm, the minimum plant height was recorded in the areas of the NBM-2020 F1 hybrid with a seeding pattern of 70 × 20 cm and treatment with Regoplant preparation - 125.50 cm. The maximum yield was achieved on the variant with the NBM 2020 F1 hybrid with a seeding scheme of 45 × 30 cm and treatment with the growth-regulating preparation Regoplant in the phase of 7-8 leaves of the culture with a dose of 50 ml / ha - 25, 34 t / ha. The lowest crop yield was obtained on the variant with the Champion F1 hybrid with a seeding scheme of 45 × 30 cm and without treatment with Regoplant - 6.72 t / ha. Conclusions. According to the results of the studies, we consider it expedient to recommend for sowing in the South of Ukraine on dark chestnut soils with irrigation a hybrid of sugar maize NBM-2020 F1 according to the scheme 45 × 30 cm and to process the growth-regulating drug Regoplant in the phase of 7-8 leaves of the culture with a dose of 50 ml / ha. This combination of agrotechnical factors ensured the maximum crop yield in the experiment - 25.34 t / ha of marketable ears in wrappers.