1. Effect of Regulating Water Deficit On Some growth Properties of Young Peach Trees

2. Team Members Zeinab, H. Behairy Department of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, Egypt. z_behairy@yahoo.com Mahmoud, M. Hegazi Department of Agriculture Engineering, Faculty of Agriculture, Ain Shams University, Cairo, Egypt Ahmed, El-Gazzar Department of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, Egypt. Noha, A. Hassan Department of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, Egypt. Mohamed, A. Shehata Ministry of Water Resources and Irrigation, Cairo, Egypt.

3. Why Water Saving? Egypt is one of the countries facing great challenges due to its limited water resources represented mainly by its fixed share of the Nile Water and its aridity as a general characteristic. Egypt is the only country in the world that depends on irrigation 100%

4. Why water saving? Cont Current Water Resources in Egypt (Millar m3) Nile Water 55.5 Drainage Reuse 5.5 Ground Water 7.5 Treated Sewage 0.7 Rain Harvesting 1.0 -------------------------------- Total 70.2 Current Water Requirements in Egypt (Millar m3) Irrigated Agriculture 59.0 Industrial 7.6 Municipal 6.5 Nile Transfer 0.3 Evaporation Network 2.2 ------------------------------------- Total 75.6 Future Water Requirements in Egypt (Millar m3) (2017) Irrigated Agriculture 65.1 Industrial 10.5 Municipal 7.5 Nile Transfer 0.4 Evaporation Network 2.1 ------------------------------------- Total 85.6

5. Why water saving? Cont The per capita share of water is less than 900 m 3 /year which is considered "the water poverty limit The value may even decrease to 500 m 3 /capita is the year 2025 due to the growth population

6. So the formulated policy focuses on: Developing new water resources Harvesting rainfall and desalination Improving water use efficiencies

7. About Peach Peach trees, officially known as Prunus Persica, got their start in China before spreading in another parts of the World A variety of Fruit trees are native to China tend to require a lot of sun. They also tolerate partial shade but usually would not produce as much as fruit. They prefer soil that is rich and moist but not saturated with water.

8. Peach Origin The peach originated in China and has been cultivated at least 1000 years B.C It has special significance in Chinese culture: the peach tree is considered to be the tree of life, and peaches are symbols of immortality and unity Peach blossoms are carried by Chinese brides. True wild peaches are only found in China, the wild fruit is small, sour and very fuzzy.

9. Global Peach Production Globally, China is by far the largest producer of peaches and Nectarines accounting for approximately 50% of the World production, followed by Italy (10%), Spain (7%), USA (6%), Greece (6%) and France (3%) (FAO 2009). Total production 1.3 Million Tons produced from 3.5 Million acres

10. Peach in Egypt Peaches, Pears, Almonds and Cherries were not introduced to Egypt until the Roman Period (117 – 138 AD) Peach is considered one of the most important fruit crop in Egypt with 79,199 Fed. [Feddan = 4200 m 2 ] dedicated to its cultivation produced 425000 Tons (2009)

11. What is the problem? Traditionally, peach cultivation used to be dominant in Egypt's rainfed areas 80% of the peach cultivation is rainfed while the rest is irrigated farms Despite of the high productivity characterizing the irrigated lands, limited water availability is well known

12. Aim of the study This induces the development of studies focusing on the optimization and efficiency of irrigation water. One of the options proposed for that purpose is the use of regulated deficit irrigation (RDI) (Behboudian and Mills, 1997).

13. Materials & Methods The trial was conducted at the Experimental Farm, Faculty of Agriculture-Ain Shams University, Egypt. Peach trees were two and three years old, growing in loamy soil, with a field capacity 36,25%and welting point 19.50% under drip irrigation system. The source of irrigation is the River Nile with EC 0.3 ds/m. Trees were spaced 2.00 x 1.25 apart, high density farm, and trained to Y shape system

14. The experiment included 5 irrigation treatments

15. For calculating the daily irrigation amount for each treatment for the two growing seasons the following formula recommended by Awady et al (1975) was used

16. Different estimations and measurements: Reference evapotranspiration Eto (mm) Water use WU (mm)Crop coefficient KcIrrigation water saving %Some growth parameters

17. Experimental design and statistical analysis The complete randomized block design was used with four replicates. Each replicate was represented by one tree. Statistical analysis was carried out using SAS Computer Program (1998) Duncan's multiple range tests was used for comparison between means.

18. Results

19. Water use WU Table 2. Water use WU (mm/stage) of young peach trees during 2003 and 2004 seasons.

20. Crop Coefficient Crop coefficient "Kc" Fig. 2. Crop Coefficient Kc of young peach trees during 2003 and 2004 seasons.

21. Fig. 3. Water use percentage for the different growth stages of young peach trees during 2003 and 2004 seasons.

22. Irrigation water Saving The initial stage that took place during the first two months (February and March) consumed the lowest irrigation water percentage (5.16% and 5.55%) for each growing season respectively. This stage could be considered a phenological stage tolerant to water deficit (non critical period) and RDI can save irrigation water during this stage. On the other hand, comparing these results with what has been done in the private farms without controlling irrigation. Water saving could reach to about 20%.

23. Growth measurements Fig. 4. Effect of different irrigation treatments on the net increase rate of shoot extension of young peach trees during 2003 and 2004 seasons. Net increase rate (cm)

24. Table 3. Effect of different irrigation treatments on leaf area (cm 2 ) of young peach trees during 2003 and 2004 seasons

25. It is recommended to use the crop coefficient Kc 0.28 for scheduling the irrigation program for the initial stage, Kc 0.88 for the Mid stage and Kc 0.65 for the final stage to obtain vigorous growth and efficient water saving under the same circumstances. Farmers should be advised to follow the indicative cropping pattern Recommendations

26. Recommendations Cont Increasing water association supervisors who will facilitate and coordinate between farmers to insure that they work as one team. Research as a dynamic process, is considered the key action of the policies success.