الفهرس 
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Abstract
This investigation was carried out to enhance suckers rooting ability and leaf growth to some date palm cultivars through vegetative propagation by plant growth regulators injection and replanting under greenhouse conditions.
In this research, suckers of date palm cultivars Sewy, Hayani and Zaghloul weights (2 to < 4 kg and 4-8 kg) were planted in two dates, mid of March and September in each season (2007 and 2008) at nursery in Horticulture Research Institute, Agricultural Research Center, Giza, Egypt.
All suckers were treated by 9 injection treatments, before planting, by 3 ml auxin solution as follows: 1) distilled water (control treatment), 2) 1000 ppm NAA, 3) 1500 ppm NAA, 4) 2000 ppm NAA, 5) 2500 ppm NAA, 6) 3000 ppm NAA, 7) 1000 ppm IBA, 8) 2000 ppm IBA and 9) 3000 ppm IBA.
The obtained results cleared that ‘Hayani’ increased significantly roots number/suckers than ‘Zaghloul’ and ‘Sewy’. whereas, the reverse was true concerning root length. Planting at mid of March was better than that of mid September for all recorded parameters of suckers. Using auxin injection in the suckers bases significantly increased survival percentages and means of roots, number, length, diameter, moisture and leaves number, length and growth rate.
Moreover, suckers injected by IBA at 3000 ppm or NAA 3000 ppm and planted in mid of March were the preferable for survival percentages of ‘Hayani’, ‘Sewy’ and ‘Zaghloul’ cultivars and means of roots number, length and length of developed leaves.
Key words: Suckers, Cultivars, Date palm, growth regulators, IBA, Injection, NAA, Phoenix dactylifera L., Rooting, Survival percentage, ‘Sewy’,.‘Hayani’, ‘Zaghloul’