Nitrogen Application and Management to Hops
Volume 15, Issue 2 - December 2022
Editor: Linda Chalker-Scott
A two-year study to determine the optimum nitrogen (N) rate for Hops (Humulus lupulus) grown in Wisconsin. Seven varieties were grown under five N application rates at three locations. Secondary objectives evaluated the effect of N rate on hop quality parameters, correlated petiole sap measurements with petiole tissue nitrate concentration, and evaluated plant uptake and soil nutrient concentrations following hop harvest. Variety and nitrogen rate significantly affected both biomass and cone yield. Hop quality parameters were affected by variety. Nitrogen rate significantly affected hop storage index and total oil. Petiole sap nitrate concentrations correlated well to laboratory-determined petiole tissue nitrate concentration. Results suggest optimum N rates for hop production are variety-dependent and are lower than current state recommendations.
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