Abstract
The results of research on the influence of plant stand density and different doses of mineral fertilizers on the formation of grain yield of early-maturing maize hybrid on dark-gray forest medium-loam soil are presented. It is established that with increase in planting rates decreased indices of grain yield, grain mass of one cob and number of grains in one cob, and a mass of 1 000 grains. The use of fertilizers increased the weight of grain from the cob by 55.0-84.4 %, the lake content of the cob – by 24.9-40.9 %, and the absolute weight of grain-by 23.1-31.8 % compared to the variants without fertilizers. At the same time, the best indicators were obtained when N90 and N120 were added to the NQC. The application of mineral fertilizers increased the grain yield, on average, by 76.4-112.8% in relation to the control (2.97 t/ha). The largest increase was provided by the introduction of N90P30K30 and N120P30K30-2.95 and 3.35 t / ha. the highest efficiency of fertilizers was noted against the background with a density of 65 thousand plants/ha-an increase relative to the control of 80.1-121.5 %.
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