Fertilizers, plant density and nutritional properties of corn grain

Abstract

Abstract The article presents data on the influence of an increasing plant density of an early-ripening corn hybrid on the biochemical composition and fodder properties of grain, depending on the level of mineral nutrition. It is shown that the highest protein supply was noted for the grain obtained in the variants with nitrogen feeding; the increase in crude protein in comparison with the variants on the natural agrobackground was 1.56%. The use of complete mineral fertilization had no advantages over a single application of nitrogen-phosphorus fertilizers; against these nutritional backgrounds, the increase of 0.97-1.05% was obtained in relation to the unfertilized agricultural background. As the crops crowd, there is a tendency for the crude protein content in the grain to increase. Over the years of testing, the stable influence of the conditions of mineral nutrition and the plants density on the content of crude fiber, crude ash and nitrogen-free extractive substances has not been established. The grain with a higher crude fat content was obtained with the introduction of complete mineral fertilization, and the crowding of the crops led to the decrease in its content in the grain.