الفهرس 
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Abstract
This study was conducted during 2016 and 2017 seasons in a private date palm orchard situated at El-Khatara Village, Aswan district, Aswan Governorate on 20-years old offshoots Bartemuda date palms. They planted at 7 x7 meters apart (86 palms per fed.). The selected palms were irrigated with Nile water through surface irrigation system. The texture of the soil is silty clay.
All the selected Bartemuda date palm cvs were subjected to the common horticultural practices that already applied in the orchard except those dealing with potassium silicate and vitamin E applications.
The objective of the study was examining the effect of spraying silicon and Vitamin E on some vegetative growth aspects, leaf chemical composition, yield as well as some physical and chemical characteristic of the fruits of Bartemuda date palms.
Under Aswan environmental and the resembling conditions, it is recommended to spray Bartemuda date palms four times (last week of March, April, May and June) with a mixture of vitamin E at 20 ppm plus K-silicate at 0.05%.