Effect of nitrogen fertilizers on the grain productivity of vetch and wheat mixture

Abstract

Relevance and Methods. The effect of three doses of nitrogen fertilizers (N₃₀, N₆₀, and N₉₀) on the formation of a crop of vetch seeds mixed with spring wheat was studied in a field experiment in sod-podzolic sandy loam soil.

Results. In average for the study years, the yield of vetch seeds under the influence of nitrogen fertilizers decreased at the dose of mineral nitrogen 30 kg/ha by 12,7% at a dose of 60 kg/ha by 26,4% at a dose of 90 kg/ha by 36,4%, and grain yield of spring wheat increased, respectively, 1,8; 2,5 and 2,9 times. A significant decrease in the yield of vetch was observed at doses of mineral nitrogen N₆₀ and N₉₀, the yield of wheat grain significantly increased at all doses of mineral nitrogen. Nitrogen fertilizers were most effective in drought conditions, when the symbiotic fixation of air nitrogen in the crop area was weakened. Under conditions of increased moisture, nitrogen fertilizers did not provide an increase in the grain yield of the mixture, but increased the resistance of the crop to lodging, which made the mixture more technologically adapted to harvesting.