PRODUCTIVITY OF HETEROGENEOUS COM HYBRIDS DEPENDING ON FERTILIZERS

The article presents the results of studies effect different doses mineral fertilizers N90P90K90 and N120P120K120 on productivity corn. We studied formation green mass yield corn in following groups maturity: medium-early hybrid Svityaz FAO 250, medium-ripe Aquazor 320 late-ripe Hetera 420. During growing season, plants were exposed to adverse weather conditions. best conditions observed 2018 (SCC 1.34) worst 2016-2017 0.64-0.81). Such affected growth processes crop height, indicators which differed over years had form a sinusoidal depending phase development. In ejection phase, height maize 250 was 197 cm, - 199 cm 420 203 wax grain ripeness increased 262 263 276 respectively, against N120P120K120. One that characterize is percentage cobs stems structure biomass. According our data, largest share variants without fertilizers, 40.6-43.1 37.3-42.1% maximum background fertilizers. this case, by weight heaviest reached 197.0-216.7 g per plant using at dose increase 1.29-1.58 times compared 1.33-1.48 times, with harvesting panicles. highest dry matter found applying N120P120K120, 22.46 t / ha, hybrids 25.13 28.03 respectively. High digestibility from panicles milk ripeness, where content feed units 1 kg increases 0.93 1.04.