الفهرس 
1.INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Water Shortage is a world wide problem, where 40% of the world
population is suffering from water scarcity. In Egypt, due to the existence of
semi dry climatic conditions and limited available water resources,
optimization and saving of water consumption have vital importance. The
main goal of this research was to investigate the effect of the partial rootzone
drying irrigation (PRD) on yields and other parameters, and to compare to
the conventional irrigation (CI) when applying the same amount of water.
Field experiment was carried out in the experimental farm of faculty of
Agriculture, Menoufia University, Shibin EL-Kom during (Summer Season
2015- Winter Season 2016), to evaluate the PRD irrigation regime under
Egyptian condition.Two irrigation regime ( CI and PRD), with three amount
of water under (Covering and non-Covering condition) were studied. The
measured parameters, which were affected due to the variation in the studied
factors, were soil moisture, salt distribution, plant length, leaf area, crop
yield and biomass, water use efficiency, and some properties of fruit to
evaluate the fruit quality.
The obtained results under Egyptian condition recommended PRD regime,
also covering system on winter season. The PRD treatment achieved the
best of moisture distribution in soil, decreasing of salt concentration, higher
length, higher leaf area and weight of fruit. Finally the PRD improved the
irrigation water use efficiency (WUE) and increased the percentage of
marketable yield compared to the CI methods, especially when applying it
under deficit water.
Key word: Conventional irrigation – Partial root zone irrigation –Tomato-
Water use efficiency- Deficit irrigation.