الفهرس 
coverOnly 14 pages are availabe for public view
 |  | from | 136 |  |  |
| | | from | 136 | | |
Abstract
This study was carried out during two successive seasons (2004/2005) and (2005/2006) on four years old peach trees cv. Florida Prince budded on Nemagard rootstock grown in sandy soil of a private orchard at Wadi El-Furegh region, El-Giza governorate. The present investigation aimed to verify the possibility of supplying peach trees with its nutritional requirements from different sources of fertilizers (organic, bio-organic, and chemical fertilizers), and to examine three levels of each type to determine the optimum dose of each source. Results showed that the highest level of the different fertilizers improved all the vegetative growth measurement including (new shoot length, trunk circumference, leaf area, and total leaf chlorophyll content) and the nutritional state. Also it appeared that organic and bio-organic treatment significantly improved the nutritional status compared with the chemical fertilizers. Also the highest level of the different fertilizers significantly improved flowering, fruit set, fruit quality and tree yield.
Meanwhile the present study concluded that organic and bio-organic fertilizers were more effective in improving fruit quality, and yield compared with the chemical fertilizers. Thus it can be recommended to replace the chemical fertilization with organic and bio-organic nutritional sources in order to improve vegetative growth, flowering, fruiting characteristics and yield of Florida Prince peach orchards.
Moreover to produce healthy and high fruit quality crop fitted for safe local consumption and fulfill the expanding exportation demand.
Thus it can be recommended to use the natural sources of fertilizers instead of chemical fertilizers.