Tomashuk O. Productivity of corn hybrids depending on agrotechnical methods of cultivation under conditions of the right-bank Forest-Steppe

The thesis presents theoretical substantiation and experimental results of researches on the peculiarities of growth, development and formation of grain productivity of corn hybrids of different maturity groups depending on the method of soil tillage and application of anti-stress preparation Ratchet under conditions of the right-bank Forest Steppe. The highest corn grain yield was obtained under conventional technology of cultivation on the sites with mid-early hybrids of the foreign breeding ‘Adeway’ and ‘LH 3232’. Under No-till technology, the maximum rate of grain productivity was provided by ‘Adeway’ hybrid of 7.63 ± 1.13 t/ha and ‘Khorol SV’ hybrid of 6.97 ± 0.67 t/ha. At the same time, the cost-effectiveness assessment shows that the hybrids of the mid-early group ‘Khorol SV’ and ‘Adeway’ provided relatively net profit ranging within 18.07-20.33 thousand UAH/ha under No-till cultivation technology. It has been found that the influence of elements of the cultivation technology on the indicators of quality and nutritional value of corn grain remained within the error of calculation of the mean values, and the coefficient of complex assessment of No-till technology competitiveness compared to the conventional one was 1.3.