Document Type : Research Paper
Authors
1 Former M.Sc. Student, Department of Horticultural Sciences, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran.
2 Professor, Department of Horticultural Sciences, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran
Abstract
In order to evaluate the effects of gibberellic acid and vermicompost on growth and flowering of daffodil flower, a factorial experiment has been conducted under greenhouse conditions, based on completely randomized design with 12 treatments and three replications and four samples in each replication. The first factor involves vermicompost in four levels, namely 0 (control), 10%, 15%, and 20% of potted soil (V/V) and the second factor, three levels of gibberellic acid, 0 (control), 150, and 300 mg/L, all applied by dipping the bulbs for 48 hours. Results of analysis variance of the data show that the impacts of gibberellic acid and vermicompost on most traits such as leaf area, vase life, number of leaves, chlorophyll index, TSS, leaf phosphorus, and leaf potassium have displayed significant effects (P<0.01), compared to the control. Also gibberellic acid and vermicompost have had significant impacts (P<0.01) on carotenoid (0.28 mg.g-1Fw), leaf nitrogen (2.07%), root fresh weight (11 g), root dry weight (1.1 g), and stem diameter (8.11 mm). Also, the duration of flowering stem appearance has had significant effects (P<0.05). This study’s results show that the application of vermicompost at 20% level and gibberellic acid with a concentration of 300 mg/L have improved the growth and accelerated flowering with an average of 10 days, increasing the vase life of flowers with an average of four days with a noticeable difference, compared to the control.
Keywords
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