Wp?yw miejsca uprawy na plonowanie dzwonka ogrodowego (Campanula medium L.)

摘要

In the 1999/2000 growing season, an experiment to assess the flowering of Canterbury bells (Campanula medium L.) grown in the ground and in an unheated plastic tunnel was conducted. Two cultivars were used: ‘Einfache Blau’ and ‘Einfache Rosa’. The unheated plastic tunnel turned out to have provided very good conditions for the wintering over of the two cultivars: in comparison with the plants grown in the ground, the flowering of those in the tunnel was 9-10 days earlier and two-four times as many inflorescence shoots were harvested. Also, the cultivation in the unheated plastic tunnel ensured the plants better quality.