Gubar O. The productivity of pop corn according to plant density and mineral nutrition in north podzone of Steppe of Ukraine

The object is forming of the corn productivity of pop-corn depending on density of standing plants, background of basic soil tillage and mineral nutrition. Purpose of research - to set the optimum parameters of pre-harvest density of plant standing, basic soil tillage and level of mineral nutrition for the new hybrids of pop-corn in the conditions of north subzone of Steppe of Ukraine. Methods - the field, laboratory, mathematically-statistical. Theoretical and practical results. Developed and offered to the production technological receptions of growing the pop-corn hybrids Vulkan and Dniprovsky 929 in north subzone of Steppe of Ukraine, that allows to increase the productivity of grain on 0,30-0,55 t per ha and level of profitability on 70-140 %. Novelty. In the conditions of north subzone of Steppe of Ukraine was firstly established the optimum pre-harvest density of plant standing of pop-corn hybrids Vulkan and Dniprovsky 929. Scientifically grounded influence of mineral fertilizers at the different norms of their application depending on the background of basic soil tillage on growth, development of plants and corn productivity. Determined the economic and energetic indicators of models of growing technology of pop-corn hybrids. Degree of introduction. The results of researches are tested in the production terms in the Co.Ltd "Agropolimerdetal'" of Solonyansky district and Co.Ltd "Frunze" of Mezhivs'ky district of the Dnepropetrovsk region on a general area of 16,6 ha. Obtained results of scientific researches can be used in the farms of different ownership forms. Sphere (industry) of use is agriculture.