Effects of IBA , growing Media and Certain Treatments on Rooting of Olive Cuttings Olea europaea L.

Abstract

Three different experiments were conducted in a certain nursery. The aim of these experiments is to know the effect of the different concentration of the Auxin (IBA) growing media, and treatments of olive cuttings (sliced, normal cuttings and from previously ringed origin). Two cultivars of olive (17 years old) were tested, the first was Manzinello and the second was Ashrasy and cultivated the mid of February 2003 in Baghdad. Results of this study are summarized follows" 1- Ashrasey cultivar gave a significant increase in the rooting percentage (78.56%), the average number of roots in cutting (7.39 root/cutting) and finally the average length of roots (21.97 cm) in comparison with Manzinello cultivar. Also, the percentage of giving roots and average root length sliced cutting and those taken from previously ringed cuttings was (61.05-61.93 %) and (16.08-20.28 cm) respectively compared to the control (normal cuttings). However, the same results were true for the mentioned characters when a combined treatments between sliced and ringed cuttings. 2- The percentage one peat moss: river (1:1) sand that was treated 4000ppm gave the highest rooting percentage (83.73%), average of root number (13.1 root/cutting) and root length (33.65cm). An interacted treatment between rooting media (1:1) and the two cultivars gave a high significant percentage in the three studied characters. The sand media was the weakest in giving roots, then the media of (2:1). The treatment of IBA with 4000ppm gave the highest rooting percentage (70.77%), and the treatment of IBA with 3000ppm gave the highest root length (25.85 cm). The interacted treatments of IBA 3000ppm and Ashrasy cultivar gave the highest rooting percentage (95.43 %). The treatment of IBA 5000ppm the highest root number (11.53 root/cutting). The combined treatment of IBA 4000ppm and the Manzinello cultivars gave the highest average of root length (29.87 cm). Ashrasy cuttings show an optimum way of propagation, rapid and high percentage of giving roots (90%), but Labeeb cv. Show difficulty of giving roots. Khstawi cv. May be motivated by growth regulator or using suitable growing media (80.07%).