TRICKLE IRRIGATION UTILIZATION FOR WHEAT IN SANDY SOIL

This study was conducted on a calcareous salt – affected soil at Ras Sudr area, South Sinai governorate during season of (2006&2007), to evaluate the influence of trickle irrigation systems (Surface and Sub-surface) on wheat crop cultivation under saline conditions of soil and water. Also, this work includes different water management technique, (quantities and discharges). The objective of the present work is to implement some of these discharges and water deficit in computing actual evapotranspiration of wheat under desert conditions, to maximize the yield production of wheat under trickle irrigation systems to save more water quantities and to keep the soil sustainable from degradation. Results of this study may be revealed that: 1- Highest yield (2254.3 kg/fed.) and growth parameters Leaf Area Index “LAI” of (85%), weight grain “W” of (61.6gm) and crude protein “P” of (15.4%) were obtained under subsurface trickle irrigation system at 100% applied water quantity and 8L/h emitter discharge . 2- Lowest actual evapotranspiration “Eta”, for (Initial, development, mid-season, late-season) growth stages and seasonal, (34, 103, 80.4, 48.1 and 265.3 mm) respectively, were obtained under subsurface trickle irrigation system at 100% applied water quantity and 8L/h emitter discharge. 3- Water use efficiency for surface and subsurface trickle irrigation systems at 80% applied water quantity and 8L/h emitter discharge was (1.17 and 2.25 kg/m 3 ) resp.