الفهرس 
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Abstract
This study was conducted during 2014 and 2015 seasons in a private date palm orchard situated at Edfu district, Aswan Governorate on 9-year old Sakkoti date palms (as dry date palm cv.). These palms produced through conventional propagation by offshoots as well as characterized by regular bearing. The selected palms are uniform in vigour, healthy, good physical conditions, free from insects, diseases and damages. They planted at 7 x7 meters apart (86 palms/ feddan). The selected palms were irrigated with Nile water through surface irrigation system. The texture of the soil is sandy loam.
The target of this study was elucidating the effect of different concentrations and frequencies of potassium silicate application as a source of silicon on growth characteristics, palm nutritional status, flowering, fruit setting, yield and fruit quality of Sakkoti date palms.
Randomized complete block design (RCBD) was followed in which this experiment included ten treatments and each treatment included three replicated, one palm per each.
Under the experimental and resembling conditions, it is advised to spray Sakkoti date palms twice at growth start and before hand pollination and just after fruit setting with potassium silicate at 0.5% for improving yield quantitively and qualitatively.