The Phenolic Composition of Hops (Humulus lupulus L.) Was Highly Influenced by Cultivar and Year and Little by Soil Liming or Foliar Spray Rich in Nutrients or Algae

The interest in expanding the production of hops outside traditional cultivation regions, mainly motivated by growth craft brewery business, justifies intensification studies into its adaptation to local growing conditions. In this study, four field trials were undertaken on a twenty-year-old hop garden, over periods up three years assess effect important agro-environmental variation factors phenol and phenolic composition establish relationship with elemental cones. All arranged as factorial designs exploring combined of: (1) plots different vigour plants × year; (2) plant vigor algae- nutrient-rich foliar sprays (3) plot liming (4) cultivars (Nugget, Cascade, Columbus) year. Total phenols hops, significantly influenced most experimental factors. Foliar spraying that least measured variables. year had greatest accumulation total cones may have contributed interactions often occurred between under study. average for concentrations ranged from 11.9 mg g−1 21.2 g−1. Significant differences quantity compounds also found cultivars. identified flavonols (quercetin kaempferol glycosides) carboxylic acids (p-coumaric caffeic acids).