A pot experiment has been conducted in a plastic house at the Department of Protected Cultivation, Technical Institute of Zakho, Duhok Polytechnic University during the fall season of 2021–2022 to investigate the effects of three growth media (peat moss, loam + peat moss (1:1) and clay + peat moss (1:1)), foliar spraying of calcium chloride (CaCl2) at three concentrations (0, 500 and 1000 mg. L-1) and Gibberellic acid (GA3) at three concentrations (0, 200 and 400 mg. L-1) on vegetative growth, flowering and corm yield of freesia (Freesia refrecta L.) plant. The experiment was laid out in a Randomized Complete Block Design (RCBD) of three factors with three replicates. The obtained results displayed that the peat moss medium surpassed other media in giving the highest vegetative growth traits (plant height, leaf area, and number of leaves per plant) as well as enhancing flowering traits (number of florets/spike, and vase life of cut flower) and corm yield traits (number of produced corm/plant, and corm volume). The same significant impact was exhibited by CaCl2 at concentrations of 500 and 1000 mg. L-1. Whereas GA3 at concentrations of 200 and 400 mg. L-1 improved most studied traits except number of florets per plant and vase life of cut flowers. The maximum vegetative, flowering, and corm harvest traits were obtained from grown plants in peat moss medium and by spraying them with increased concentrations of CaCl2 and GA3. Therefore, the peat moss medium in combination with increased concentrations of GA3 and CaCl2 is recommended for the improvement of freesia production quality and vase life
The study was conducted in the plastic house of Horticulture Department -College of Agricultural engineering sciences. Duhok University -Iraq during spring season of 2020 to investigate the effect of electric current severity and shock timing of cuttings on the vegetative and rooting characters of two olive (Olea europea) cultivars. Three levels of electric current severity AC 2, 4, 8, Ampere and three timing of electric shock 1, 2, 4 minutes were tested on cuttings of two olive cultivars (Dogel and Basheqi). A special electric apparatus was designed for this purpose. The cuttings were soaked before treatment for 3hrs in a 1% NaCl solution, and then soaked in fresh water for the same period 3hrs before planting. The experiment was applied using randomized complete block design (RCBD) of three replications and the means comprised by Duncan's Multiple Ranges Test under 5%. Cuttings of Basheqi cv. which were exposed to medium current for a high period (T16) 4 A × 4 mins significantly increased rooting percentage 73.33%, roots number per cutting 36.25, fresh weight of roots 1.77 g, dry weight of roots 0.66 g, shoots number per cutting 4.25, leaves number 46.00, fresh weight of vegetative growth was 2.44 g and dry weight of vegetative growth was 1.15 g. While high current treatment (T8) 8 A × 2 mins of Dogel cultivar caused the superiority in obtaining the longest roots 17.17 cm and largest leaf area 3.77 cm 2 .
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