الفهرس 
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Abstract
This thesis was conducted to investigate the effect of garlic cloves extract (GCE) at 50 and 100 g l-1 and licorice root extract (LRE) at 25 and 50 g l-1 as foliar spray treatments on the vegetative growth and leaf anatomy of strawberry plants cultivated in different growing media, i.e. traditional soil (silt:sand 1:1 v/v), solid substrates (Peatmoss, Perlite and vermiculite 1:1:1 v/v/v), hydroponic (DFT technique) during 2017 and 2018 seasons. The growth of strawberry plants cv. festival cultivated in the three assigned growing media was significantly enhanced by the applied GCE and LRE treatments. Significant increases in the fresh and dry weights of root and shoots, root size, number of leaves and total leaves area / plant were obtained with all GCE and LRE treatments, while a significant reduction in roots / shoots ratio was occurred. In addition, both treatments caused a significant increase in the leaf content of photosynthetic pigments, nitrogen, phosphorous, potassium, calcium, magnesium and crude protein compared with the untreated plants. Anatomically, the applied concentrations of both GCE and LRE led to obvious increases in the thickness of mid vein, length and width of main vascular bundle, thickness of phloem and xylem tissues, number of xylem vessels/ bundle and thickness of lamina and its tissue components (upper and lower epidermis and mesophyll tissue). Over and above, both applied soilless culture systems significantly increased (flower longevity, relative total yield, number of fruits/ plant, fresh and dry weights/ fruit and percentage of dry matter/ fruit). Besides, the fruit yield and relative total yield/ plant as well as the fruits characteristics expressed as fresh and dry weight, dry matter/fruit were improved as affected by GCE and LRE treatments. On the other hand, a significant increase occurred in the concentrations of N, P, K, Ca, M, crude protein; reducing, non-reducing and total soluble sugars and vitaminC contents as well as total soluble solids (TSS) estimated in the marketable fruits of strawberry plants cultivated in the two soilless culture systems Furthermore, these positive effects were most pronounced with the plants cultivated in solid substrate mixture followed by the plants cultivated hydroponically then those cultivated in traditional soil. Also, LRE at 50 g l-1 was the most effective treatment in this respect followed by LRE at 25 g l-1 then GCE at 50 g l-1 while GCE at 100 g l-1 was the least effective. Accordingly, the present study strongly recommends the use of the applied soil alternative media and natural extracts as effective, safe and eco-friendly agricultural practices in the cultivation of strawberries and other vegetables to improve their growth, productivity and sanitary quality.