Abstract
The purpose of research is improving the technology of growing corn for grain in the farms of Western Ukraine in the direction of optimizing fertilizer system and crop protection. Research methods: hypothesis, experiment, field observation, laboratory, visual and comparative calculation method. Research results. Research conducted in the conditions of the West of Ukraine. The experimental field was characterized by sod-podzolic light loam soils. During the studies, the effectiveness of foliar fertilization with water-soluble fertilizer Rosasol 18-18-18 + IU (3 kg/ha) and plant protection systems (spraying with insecticide August Borei Neo and fungicide Amistar Extra 280 SC) was determined. The experiments studied hybrids Ajax (FAO 210), Scanner (FAO 250), Exsklam (FAO 270) and Pioneer (FAO 300). For research, 12 sites with different foliar feeding schemes and plant protection systems were established. Mulching tillage was carried out at all sites. Urea (200 kg/ha) and magnesium sulfate (150 kg/ha) were applied for pre-sowing tillage. Sowing was performed with a Väderstad Tempo 8 seeder, which simultaneously with the sowing of seeds carried out intra-soil application of polyphos fertilizer (150 kg/ha). Seed sowing rate 15 kg/ha. To protect plants from weeds, crops were sprayed with Task Extra seed herbicide (0.44 l/ha). According to the results of research, it was found that foliar fertilization with Rosasol 18-18-18 + ME fertilizer contributed to the increase in corn grain yield by 0.78-1.65 t/ha. The highest yield was observed in the hybrid Pioneer (FAO 300), which was 11.68 t/ha (yield increase of 16.0 %), and the lowest in the hybrid Ajax (FAO 210) - 8.20 t/ha (yield increase of 18.0 %). Foliar fertilization and protection of plants from pests and diseases with the use of drugs Rosasol 18-18-18 + ME (3 kg/ha) + insecticide August Borei Neo (0.7 l/ha) + fungicide Amistar Extra 280 SC (0.7 l/ha) allows to obtain an increase in corn grain yield in the range from 2.02 to 2.19 t/ha or by 20.3-29.1 % depending on the hybrid compared to the control. The highest grain productivity of 12.52 t / ha and yield increase compared to the control of 2.19 t/ha was obtained in the hybrid Pioneer (FAO 300). Conclusions. The introduction of a system of plant protection against pests and diseases against the background of foliar fertilization provides an increase in grain yield by 0.84-1.34 t/ha (7.2-12.1 %) compared to options that provide only foliar fertilization. Foliar feeding and plant protection measures increase the grain productivity of corn. The economic effect from the introduction of foliar fertilization during the growing season varied from 4626 to 8730 UAH/ha, and from - fertilization and protection systems – from 11054 to 14844 UAH/ha. Key words: research, corn, water-soluble fertilizer, insecticide, fungicide, foliar fertilization, plant protection system, yield, efficiency.
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