Effect of planting date and IBA concentration on rooting ability of stem cutting of fraser's photinia (Photinia x fraseri)‎

الملخص EN

This study was carried out in the Agricultural College/ Salahalden University during the period between 1st March, 2010 to 1st August, 2010, to investigate the effect of planting dates (1st Mar, 1st Apr, 1st May), and IBA concentrations (0, 2000, 4000, 6000, 8000) mg.l-1 on rooting ability of stem cuttings of Fraser's photinia (Photinia x fraseri).

Results show that the best rooting percentage 60.93% and roots number are for cutting propagated in 1st Apr, while the best superior increase in shoot growth number, leave number, and shoot dry weight was in 1st May.

6000 and 8000 mg.l-1 IBA causes significantly increase in rooting percentage 67.11, 68.33% compared to control (39.00%).

Also roots number increased significantly by IBA using 2000 , 4000, 6000 and 8000 mg.l-1 with increasing percentage 23.81, 33.33, 47.62 and 50.00% when compared with control; the highest significantly increase in mean length of longest roots reach 485.43% for 8000 mg.l-1 than control.

Although 2000 and 4000 mg.l-1 IBA causes significantly increase in shoots growth number, all IBA concentration show significantly increase in leave number and root dry weight, while the 4000, 6000 mg.l-1 concentration had significantly effect on shoot dry weight.

The interaction between planting dates and IBA concentrations cause significantly variance in all rooting parameters and the highest rooting percentage was72.00% for cuttings treated with 4000, 6000, 8000 mg.l-1 and planted in 1st Apr , and the highest shoots growth number and leave number 4.67, 13.33 from cuttings treated with 2000, mg.l-1 and planted in 1st May.

Keywords: planting dates, IBA concentration, Fraser’s photinia .

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