University of Khartoum

Effect of Different Growing Media, Light Intensity and Spacing on Three Zinnia (Zinnia elegans) Cultivars

Effect of Different Growing Media, Light Intensity and Spacing on Three Zinnia (Zinnia elegans) Cultivars

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Title: Effect of Different Growing Media, Light Intensity and Spacing on Three Zinnia (Zinnia elegans) Cultivars
Author: Hassan, Balgees Sabir Osman
Abstract: This study was conducted in the nursery of the Department of Horticulture, Faculty of Agriculture, University of Khartoum at Shambat from February to September of 2017. The objective was to assess the effect of four growing media (“Peat”, “Silt+ Sand” (1:1), “Silt+ Peat” (1:1) and “Silt”), light intensity (Sun and shade) and three planting spacing (25, 30 and 40 cm) on growth and development of three zinnia cultivars namely, ‘Lilliput’, ‘Dwarf Pepito’ and ‘Peppermint Stick’. Seeds were sown in trays and the seedlings were transplanted into plastic bags (15×17 cm) and after four weeks planted in the ground. Growth and flowering parameters, measured weekly or at the end of the experiment, were leaf number, plant height, number of branches, number of flower buds, number of flowers, flower diameter, leaves fresh and dry weight, shoot fresh and dry weight, root fresh and dry weight, flower fresh and dry weight, total fresh and dry weight and leaf area. A factorial experiment in a completely randomized design with three replications was used and data were statistically analyzed using SAS. The results indicated that significantly (5%) higher values of growth and flowering parameters were obtained with “peat” and “peat+silt”; there were no significant differences among the other media used (“Silt” and “silt+sand”) regardless of cultivars or light intensity except with the cultivar ‘Peppermint Stick’ in both the “silt +sand” and the “peat +silt” mixes which resulted in better flowering outcome. Plants grown under sun gave higher parameters values than those under shade. Plantingix spacing had no significant effect under sun. Thirty and 40 cm spacing under shade gave better results than 25 cm. It was concluded that peat and peatcontaining media were the best for growing Zinnia elegans under direct sun regardless of planting spacing
URI: http://khartoumspace.uofk.edu/123456789/27032


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