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Impact of Different Zinc Levels and Benzyl Adenine Concentrations Applied as Foliar Spray on the Vegetative Growth of Two Zinnia elegans Cultivars

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Document Type : Research Paper

Abstract

ABSTRACT: This study was conducted at the College of Agriculture Engineering Sciences, Lath of Horticulture Department Nursery. To investigate the effects of varying Zn concentrations (0, 0.50, and 0.75) %, as well as varying Benzyl adenine (BA) concentrations (0.50, and 100) mgL-1 on some vegetative traits of two cultivars of Zinnia plant. The results were as follows: The mean values showed that the largest plants (90.556 cm) were recorded in the Zinnia Lavonda cultivar. Also, the same cultivar shows the highest number of branches, aerial fresh and dry weight, and total carotin reached (8.160 branches/plant, 213.194 g, 11.534 g, and 12.398 mg.g-1), respectively. While another parameter such as leaves number, internodes number, leaf area, and total chlorophyll were observed in the Zinnia rosso scarlatta cultivar and gave the maximum results reached (23.284, 10.790, 19.206 cm2, 30.561 mg.g-1), respectively. Also, data reported that leaves number, branches number, number of internodes, shoot fresh and dry weight, leaf area (cm2), and total carotin increased significantly with a 50 mgl-1 concentration of BA for the Zinnia Lavanda cultivar (26.741, 9.296, 12.556, 259.054, 13.829, 24.489, and 14.798 mg.g-1), respectively, compared to control. About the three factors, the highest plant high for two cultivars Zinnia Lavanda and Zinnia rosso scarlatta, reached 101.411 cm when spraying the plant by 50 mgl-1 + 0.50% Zn, than the control plants (77.856 and 77.356 cm) respectively, were obtained in two cultivars. While the number of leaves, number of branches, number of internodes, and leaf area (cm²) increased significantly compared to control and other treatments, the main value reached (30.889, 9.778, 15.222, and 33.230 cm²) respectively, when the Zinnia Lavanda cultivar was spraying with 100 mgl-1BA+ 0.50% Zn. Also, plant fresh and dry weight, total chlorophyll, and total carotin give the height value reached (333.080g, 15.680g, 42.714 mg.g-1, and 17.90 mg.g-1),

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References
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Kirkuk University Journal for Agricultural Sciences (KUJAS)
Volume 16, Issue 3
September 2025
Page 246-253
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