Effects of media and indole butyric acid (IBA) concentrations on hopbush (Dodoneae viscosa L.) cuttings in green house

Abstract

Hopbush (Dodoneae viscosa L.) is an evergreen bush type tree; that is used for hedges and green walls in parks, gardens and houses, in South East of Iran. Propagation by stem cuttings is quicker and cheaper than seed, if the cuttings set in convenient media and rooting hormone. In order to investigate the effects of different media and different concentrations of indole 3-butyric acid (IBA) on rooting of hopbush (Dodonea viscosa L.), cuttings an experiment was conducted using mist system in greenhouse in spring 2010. The treatments were 3 different media: sand, perlite, and sand + perlite, (1+1 by volume), with 4 levels of IBA concentrations (0 ppm, 2000 ppm, 4000 ppm, and 6000 ppm). A randomized complete block with factorial design was used with 5 replications. The average and the means were compared by Duncuns multiple range test (1% and 5%); M STAT-C was used for comparing the interaction effects. The effect of medium on number of roots, percentage survival of stem cutting, root fresh weight and dry weight was significant, but on root length was not significantly affected. The effects of different concentrations of hormone on number of roots, percentage survival of stem cutting, root fresh weight and dry weight was significant. The interaction effect of media and hormone on root length was significant, too. The best result was obtained in per-lite, with 4000 ppm IBA. The results showed that perlite medium and 4000 ppm IBA concentration can be suggested for soft wood cutting of hopbush.