ROLE OF ROOT FEEDING IN MODERN TECHNOLOGY OF CULTIVATING GRAIN CORN

The article presents the results of studying impact foliar fertilization with Ekolist Mono Zinc microfertilizer on complex economically valuable traits and productivity maize hybrids different maturity groups. research has been conducted for dependence timing level corn. Field was established during 2019-2020 in field Department Plant Breeding, Breeding Bioenergy Crops SE "Kordelivske" IC NAANU Vinnytsia National Agrarian University. soil experimental site - dark gray is characterized by following agrochemical parameters: humus content 3.27%, nitrogen supply (by method Cornfield) low 116 mg / kg soil, mobile phosphorus compounds Chyrykov method) average 95 , high potassium 137 pH 6.5. A two-factor experiment corn split plots. study performed quadruplicate. sown area plot 50 m2, accounting 25 m2. Observations crop were according to generally accepted methods. Studies have shown that largest increase plant height (11-18 cm) attachment cobs observed variants two feeding Ecolist Zinc. Application phase 5-7 10-12 leaves provides highest value cob length: DKS 2971 (FAO 200) 22.0 cm, 3476 260) 25.2 cm 3511 330) 26.0 increases weight 1000 grains 7.5-12.4%, protein 0.07-0.15%, reduces fat 0.01-0.20% compared control. yield studied obtained double application corn, years it was: 7.5 t ha, 9.8 ha 10.4 while control 6.6; 8.8 9.0 respectively. Taking into consideration analysis economic indicators cultivation hybrid 330), gross production per 1 41.44 thousand UAH option lowest cost grain set 156.5 c. final indicator efficiency profitability amounted 254.5%. Thus, groups, improves quality terms chemical composition optimizes traits.