The effect of nitrogen nutrition on winter wheat yield
1995
Vnuk, L. | Lozek, O. (Vysoka Skola Polnohospodarska, Nitra (Slovakia))
In 1990-1993 a small-plot field trial was carried out to study the effect of optimization of nitrogen rates on production and qualitative dressing of winter wheat (the Vlada variety) grown after pea based upon information on anorganic N content in soil and nitrogen taken by plant. Differentiated nitrogen nutrition influenced the grain yield, crude protein and starch contents statistically significantly. Changes in wet gluten content were insignificant. Higher nitrogen rates raised crude protein content and reduced the starch content. In the given soil-climatic conditions positive economic effect from applied nitrogen nutrition was obtained only with the lowest nitrogen rates (32 or 38.4 kg/ha, resp.), profitability of nitrogen fertilization was 68.7 % or 32.2 %, resp. Nitrogen rates of 98 and 130 kg/ha from the point of view of economic effectiveness, profitability of fertilization and profit per area unit were inefficient.
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