RESPONSE OF FREESIA (FREESIA REFRECTA L.) PLANT TO DIFFERENT GROWTH MEDIA, CALCIUM CHLORIDE AND GIBBERELLIC ACID

HAJAR FAESAL  MOSA; YOUSIF ALI  ABDULRAHMAN

doi:10.26682/ajuod.2022.25.2.13

HAJAR FAESAL MOSA Dept. of Horticulture, Akre Technical College, Duhok Polytechnic University/Duhok, Kurdistan Region-Iraq
YOUSIF ALI ABDULRAHMAN Dept. of Horticulture, College of Agricultural Engineering Sciences, University of Dohuk, Kurdistan Region-Iraq

DOI: https://doi.org/10.26682/ajuod.2022.25.2.13

Keywords: growth media, calcium chloride (CaCl2), gibberellic acid (GA3), freesia plant

Abstract

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

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