Abstract
This experiment was conducted in a private nursery in Mosul city, Nenava Governorate, with aim to improve growth characters of N. exaltata (L.) Schott by spraying the plants with Paclobutrazol at concentration 0.0 (control), 5.0 and 10.0mg.l-1 and Micronutrient at three concentration of Micronate 15 fertilizer 0.0, 0.25 and 0.50 gm.l-1 and the interactions. The results can be summarized as follows: Spraying plants by PZ at 10 mg.l-1 caused a significant increase in frond number 31.06 leaves, frond length 32.33 cm, leaves area 1474.2 cm2, leaves dry weight 4.01 g., roots and rhizomes dry weight 4.55 g. compared with control. On the other hand, the treatment above caused significantly decrease of leaflets number, chlorophyll content and concentration of Fe, Zn, Mn, in leaves tissues. Spraying plants with Micronate fertilizer at concentration 0.50 gm.l-1 caused a significant increase of fronds number, frond length, leaves area, dry weight of vegetative growth, root and rhizome dry weight, in addition of chlorophyll content, but these treatment caused a significant decrease in concentrations of Fe, Mn and Zn. In general, to obtain lest values of growth characters the plants must sprayed with 10 mg.l-1 PZ and 0.50 g. l-1 of Micronate fertilizer.
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