Influence of fertilizers on harvest yield, uptake of nutrients, and "raw" protein content in winter rye grains of Vologda region

Abstract

Based on results of the research done during 2017–2019 on the sod-podzolic medium loamy soil of the Vologda region, when applying the estimated doses of fertilizers N90P40K100-120 we can achieve 67–79% increased yields of winter rye grains compared to the control. When applying fertilizers with the dose N12P16K16, yield of winter rye straw increases by 25%. With full estimated doses of fertilizer N90P40K100-120, straw yields increase by 74–87% compared to control. Uptake of nutrients of 1 ton of winter rye with respective amount of straw when applying estimated doses of fertilizers compared to control, increases by 4 kg for nitrogen, 3–4 kg for potassium and does not change for phosphorus. With N12P16K16, the "raw" protein is increased by 0.4% in absolute units or 3% in relative units compared to control, and with N90P40K100-120 –by 1.8–2.0% in absolute units or by 16-17% in relative units.