Influence of nitrogen nutrition in topiary of Chrysanthemum (Chrysanthemum grandiflorum)

Document Type : Full Paper


1 Assistant Professor, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

2 M.Sc. Student, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

3 Professor, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran


An experiment based on randomized complete block design with 3 replications performed in order to find the best levels of nutrition with 4 nitrogen levels 0, 100, 150 and 200 mg per kg soil using ammonium nitrate as a fertilizer source to increase the beauty performance in topiary of chrysanthemum. For each experimental plot, two pots (one plant per pot) were used. Rooted cuttings of Chrysanthemum (Chrysanthemum grandiflorum) code 288, cultivated in substrate consisted of equal volume of loam soil, peat and sand. The pyramid-shaped frames made using a metal wire with a wooden base to form a given topiary type for chrysanthemum. The effect of nitrogen fertilization on plant growth capability in the current condition with regard to the plant height, leaf number and area, root length, fresh and dry weight, total chlorophyll content, tissue nitrogen content and reproductive traits evaluated. The results showed that total chlorophyll content increased with increasing nitrogen levels. Most of the growth traits were higher at the level of 200-150 mg N per kg of soil and maximum nitrogen levels of 150-100 mg kg was suitable for reproductive traits. Therefore, to ensure proper growth of chrysanthemum branches in topiary form, furnishing of 200 mg N per kg of soil on vegetative growth stage and feeding reduction to 100 mg per kg of soil for the flowering process is appropriate and advisable.


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