Effect of different IBA concentrations and types of cuttings on rooting and flowering Poinsettia pulcherrima L (original) (raw)

One of the problems with commercial cultivation of poinsettia is damage to the plant during propagation. In this research the propagation process has been examined to help to facilitate better rooting. This project was conducted in the form of factorial test in a randomized complete block design with 12 different treatments and 3 replications. In this experiment 3 forms of cutting were applied; top cutting, middle cutting, lower cutting. After the insertion of IBA (Indole 3-Butyric acid) at four different densities; 0, 1000, 2000, 4000 mg/L in 2.5 centimeters of the lower part of the cuttings for 5 seconds, they were planted in washed sand then the planted cuttings were put under a mist system, so that after 5 weeks they were rooting. The results showed that the plants produced from lower cutting had the maximum level of rooting, evident from the data for; number of bracts, number of leaves, number of buds and size of bract. The highest increases in length of root, number of bracts, number of cyathium, number of leaves and size of bract were recorded with applications of an IBA density of 1000 mg/L. The tests showed that the most rooting was from top cutting and IBA for rooting was not necessary, and that the IBA density of 2500 mg/L was suitable for increasing the speed of rooting and uniformity of root growth, but according to the results of this research, IBA with density of 1000 mg/L caused longer roots and the most rooting was from the lower cutting.