Influence of Cutting Position with IBA Hormone for Different Dipping Times on Rooting of Cassia tree Cassia surattensis Burm. Stem Cuttings

Abstract

The present study was carried out in the experimental in the nursery at Al – Dorah (Baghdad). During spring 2015 under natural environmental conditions in plastic house to evaluated the effect of different concentrations of IBA (100, 300, 500, 700 and 1000( mg/1 on different cutting position (basal, sub terminal and terminal) for different dipping times (24, 48) hours, on Cassia surattensis Burm. stem cuttings rooting. After 2 months of planting the results demonstrated that the basal cutting treated with 1000 mg/l IBA in 48 hours dipping time showed the earlier rooted period (4) weeks compared with control treatment 8 weeks. The same treatment also gave the highest mean rooting numbers 1.56per cutting and the highest mean rooting lengths 2.88 cm compared with other treatments. The 1000 mg/l IBA treatment with basal and sub terminal gave the highest mean value of rooting percentage 55.5% in both dipping times compared with control treatment that gave 0.0%.