تأثیر چند نوع بستر ریشه‌زایی بر ریشه‌زایی قلمه‌های نیمه‌خشبی درختچه زینتی شیشه‌شور مجنون (Callistemon viminalis) در شرایط گلخانه

The current experiment was carried out to study the effect of several media including sand, sand+cocopeat, sand+perlite, cocopeat+perlite and sand+cocopeat+perlite on rooting quality of stem cuttings in weeping bottlebrush plant (Callistemon viminalis). The study was done during the late August of 2010. Statistical design was completely randomized with three replications. After wounding the bottom section of stem cuttings, they were placed in the media, under glasshouse mist system. Cuttings were taken out of the beds 45 days later and parameters of rooting percentage, viability percentage of cuttings after transfer to pots, number of roots, highest root length, average root length, number of new branches and root dry weight were measured. Results showed that the effect of rooting media on highest root length, average root length, viability percentage of rooted transplants and number of new branches was significant. The highest average root length was observed in the sand+cocopeat medium and the highest root length was obtained in the sand, sand+cocopeat and cocopeat+perlite media. The maximum viability percentage of cuttings after transfer to pots was observed in the sand+cocopeat, sand+perlite and sand+cocopeat+perlite media. According to the obtained results, the sand+cocopeat medium could be recommended for rooting of weeping bottlebrush cuttings under mist system.