Revealing Grain Potential of Nur Corn Hybrid Using Foliar Feeding With Komplemet Brand Liquid Fertilizers in Middle Volga Region Conditions

Foliar feeding with liquid fertilizers during the growing season, allowing for their combined application with herbicide and insecticide sprays, reveals grain potential of universal hybrids. The study was conducted in 2024-2025 at Agrobiotechnopark research facility. The soil is gray forest heavy loamy, with a humus content of 3.0…3.2%, available phosphorus 250…260 mg/kg of soil, exchangeable potassium 145…150 mg/kg and pH of 6.5…6.6. Experimental scheme: control (N24P24K24 background without KompleMet fertilizers); 1st scheme (3-5 leaves – KompleMet Corn Impulse 2 l/ha, 6-8 leaves – KompleMet Corn Impulse 2 l/ha + KompleMet Iron 1 l/ha); 2nd scheme (3-5 leaves – KompleMet Corn 2 l/ha, 6-8 leaves – KompleMet Zinc 2 l/ha). Early-ripening hybrid Nur was sown, included in the State Register for the conditions of Middle Volga region. The maximum values in the experiment for ear length were noted with the first scheme - an increase of 7.4%, other indicators of the number of grain rows by 6.6%, grains in a row by 29.0%, grain content - 38.2%, ear weight - 8.6%, grain weight per ear - 5.7%, 1000-kernel weight - 3.7%, as well as a decrease in pre-harvest grain moisture by 1.2% with the second scheme. The increase in grain productivity from the inclusion of foliar feeding in the nutrition system of Nur corn hybrid amounted to 0.94 ... 1.60 t/ha or 20.4 ... 34.7%. A positive effect was also noted on the qualitative characteristics of grain: the protein content increased by 0.8% and starch - 2.0%. The application of KompleMet Kukuruza, KompleMet Impulse, KompleMet Iron and KompleMet Zinc at 3-5 leaf and 6-8 leaf stages also revealed the forage value of Nur hybrid in terms of silage potential. The increase in green mass yield at the milky-wax ripeness stage was 5.2–14.9%.