Plant and Soil Science

The article presents the results of the study of the influence of foliar nutrition by microfertilizers “Ecolyst Monozinc”, “Sprout of Corn”, the plant growth regulator “Vympel” and the bacterial drug “Biomag” on manifestation of the linear size of corn hybrids of the early-ripe group Kharkivskyi 195MV, DKS 2960, DKS 2949, DKS 2971, the mid-early group of ripening Pereyaslavskyi 230SV, DKS 3871, the mid-ripe group DK 391, DK 440, DKS 4964, DK 315. Results of the conducted researches have noted significant influence of climatic conditions of the year on manifestation of height of the studied corn hybrids . The most favorable conditions, on moisture and temperature, for growth and development of plants have developed in 2011 and 2013. Increase in duration of the vegetative period promotes increase in the linear sizes of the plants, and hybrids of mid-ripe group (276,2-304,2 cm) were the most tall. The greatest value of the height of the planty was in hybrids DKS 2971 and Kharkivskyi 195MV (the early-ripe group), DKS 3472 - 292.6 cm, DKS 3420 - 287.7 cm (the mid-early group of ripening), DK 391 - 299.2 cm, DKS 4964 - 293.5 cm. When carrying out of foliar nutrition the height of the plants increase on 1,0-13,5 сm,in comparison with control (without nutrition). The greatest value of the height of the plants was in variants where two-time of foliar nutrition by microfertilizers "Ekolist Monozink" and " Sprout of Corn" was carried out in the phase of 5-7 and 10-12 corn leaves. The greatest value of the height of the plants (231,4-303,9 сm) was in variants where two-time of foliar nutrition by microfertilizer "Ekolist Monozink" was used in the phase of 5-7 and 10-12 corn leaves. Growth of plant height, in comparison with control, is 5.4-16.2 cm. 

corn, hybrid, plant height, microfertilizer, bacterial drug, nutrition, maturation group, growth regulator