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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/9968

Title: Water and Salt Distribution Patterns for Different Irrigation Systems and Water Regimes under Date Palms in Central Region
Authors: A. I. Al-Amoud
M. A. Bacha
Al-Darby, A. M
تاريخ النشر: 2004
Publisher: Saudi Arabia. J. Saudi Soc. for Agric.
Abstract: Field experiment was conducted over 4 years from 1991 to 1994 in the central region of Saudi Arabia to investigate the water and salt distribution patterns under mature date palm trees (Phoenix dactylifera L.) (Seleg cultivar) grown on sandy loam (Typic Torrifluvents) soil. Three water treatments based upon evaporation (E) from class A pan (50%E, 100%E, and 150%E) were applied using three irrigation systems (bubbler, basin, and trickle). Water distribution was monitored using Neutron probe apparatus to 150-cm depth. The ECe and SAR of soil paste extract were monitored periodically by collecting soil samples at 15-cm increment up to 90-cm depth. The study showed that trickle irrigation system resulted in better soil water conditions leading to higher date palms yield compared to other systems. The soil water storage under irrigation systems ranked as follows: trickle > bubbler > basin. The soil water storage for water treatment plots ranked as follows: 150%E >100%E > 50%E . Generally, the irrigation with saline water (EC* = 6.27 dS m-1, SAR = 10) for 4 years resulted in moving the class of the soil from non-saline to saline soil under bubbler and basin irrigation systems and to sodic (SAR = 12) soil in the case of trickle irrigation system. The salt accumulation with time was more pronounced with trickle irrigation system compared to other systems, but did not reach the critical level that affect yields of date palms. However, the continuation of irrigation using this type of saline water will increase soluble salt accumulation close to the critical levels. Thus, the salt accumulation problem with time can be managed by giving heavy irrigation using basin system with good water quality every 4 years.
URI: http://hdl.handle.net/123456789/9968
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