| The study was conducted in the field of the College of Agriculture, University of Kirkuk, located in Al-Sayada area, Iraq, during the 2025 growing season, to study the effect of three types of mulberry cuttings (Basal or Hardwood, Meddle and Terminal) by immersion in the growth regulator IBA at three concentrations (0, 1000 and 2000) mg L-1 at depth of 3cm for 10 seconds, and planted in two ways (Open and Greenhouse). The experiment was designed according to a RCBD design with two independent experiments. The number of cuttings for each cultivation method was 270 cuttings, and the total number of cuttings included in the study was 540 cuttings. The results showed that the basal (Hardwood) cuttings were significantly superior in all the studied traits of vegetative and root growth, except for the seedling height, for both the open and greenhouse cultivation methods, compared to the meddle and terminal cuttings. The treatment with a concentration of 2000 mg L-1 of auxin IBA was superior in the percentage of rooted cuttings, root length and the average number of new leaves formed on the cuttings, while the concentrations of 1000 and 2000 mg L-1 were superior in the number of roots and the average number of new branches compared to open cultivation. As for the greenhouse cultivation method, the concentration of 2000 mg L-1 of IBA had a significant improvement in all studied traits except for seedling height, in which the concentrations of 1000 and 2000 mg L-1 had a significant effect compared to the control treatment. The two-way interactions between the two factors a significant effect on all studied traits for both cultivation methods. |
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