Examination of different leaching methods of solublesalts from saline and sodic soil profiles

Subject Areas : Irrigation and Drainage

زهرا  بهبهانی زاده رضائیان ¹ (دانشجوی دکتری، گروه خاک شناسی، واحد علوم و تحقیقات تهران، دانشگاه آزاد اسلامی، تهران، ایران.)
ابراهیم  پذیرا ² (استاد، گروه خاک شناسی، واحد علوم و تحقیقات تهران، دانشگاه آزاد اسلامی، تهران، ایران.)
ابراهیم  پناه پور ³ (خاکشناسی، دانشگاه آزاد اسلامی ،واحد اهواز، دانشکده کشاورزی ومنابع طبیعی)
نرگس  ظهرابی ⁴ (استادیار، گروه مهندسی علوم آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران.)

Received: 2017-01-09 Accepted : 2017-06-17 Published : 2017-06-01

Keywords: Desalinization, words:sprayer leaching, intermittent Ponding leaching, leaching model, آبشویی پاششی, آبشویی غرقاب متناوب, شوری&rlm, زدایی و مدل آبشویی,

Abstract :

Increasing of population in the world caused overusing natural resources and land destruction. Salinization and sodification are two effects of land destruction. Leaching of soil soluble salts is the most appropriate method to emend and reclaim saline and sodic soils. In this study, Examination of different leaching methods of saline from sodic soils has been evaluated in Veis Area in Khoozestan Province. This area with 6000 m2 is located in north east part of Ahvaz city. Most of this region soil contain clay and fine texture which salinization and sodification is clear. Canalization has been performed to irrigate the area from Karun River. Two different leaching methods including intermittent Ponding leaching and sprayer leaching in Polyethylene culms with 15 cm diameter and 1 meter height of soil have been performed. The depth of utilized leaching were 25, 50, 75 and 100 cm, also estimated soil layers were 0-25, 25-50, 50-75 and 75-100 cm. According to our results, and experimental method were found for estimation of each leaching method. Based on the higher correlation coefficient and lower standard error, the best method was exponent model in intermittent Ponding method. The results indicated that intermittent leaching method needs less water to reclaim slightly soils, also by using this method better leaching efficiency coefficient will be exhibited.

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