Naidenko V. Productivity of Grain Sorghum Hybrids Depending on Inter-Row Spacing and Fertilizing in the Conditions of the Left-Bank ForestSteppe of Ukraine

The dissertation presents a theoretical generalization and substantiates the practical solution of the scientific problem, which consists of identifying the features of grain sorghum growth and development, yield formation, and grain quality depending on the inter-row spacing and fertilizing in the Left Bank Forest Steppe of Ukraine. ‘Brigga F1’ with inter-row spacing of 35 cm formed a yield – 7.78 t/ha; 50 cm–8.48; 70 cm–7.93 t/ha.The ‘Burggo F1’ hybrid generated the highest yields with inter-row spacing of 50 cm–7.86 t/ha. It was found that the maximum yield of all hybrids was formed at inter-row spacing of 50 cm. There is a positive moderate correlation between grain sorghum yield and level of nitrogen fertilization r=0.49. The most economically profitable was cultivation of hybrids ‘Burggo F1’ and ‘Brigga F1’, which provided yields of 8.66–8.69 t/ha and 8.03–8.07 t/ha with inter-row spacing of 50 cm and fertilizing N^60P^60K^60+N^40–60.