The quality formation of hop

The effect of the weather condition and fertilization and planting stock of hop that was got by vegetative method and by biotechnological method on a-acids in hop cones was researched. These condotions have important effect on bitter compounds accumulation in stage of cones formation and in stage of cones ripening. The a-acids content in cones was different in years of investigation. The a-acids content in a plant that was got vegetative method were increased to 3.6-4.6 % under fertilization effect. This index in plants that was got in vitro was optimized to 4.3-7.1%.