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Journal of Applied Sciences
Year: 2009  |  Volume: 9  |  Issue: 22  |  Page No.: 4020 - 4025

Leaching Saline and Sodic Soils Along with Reclamation-Rotation Program in the Mid-Part of Khuzestan, Iran

F. Rajabzadeh, E. Pazira, M.H. Mahdian, S. Mahmoudi and M. Heidarizadeh    

Abstract: The objective of this study was to study the desalination and desodification of sugarcane fields in Khuzestan plain. Leaching experiments were conducted on seven sites and intermittent ponding method was implemented for an applied water depth of 100 cm. Among four models fitted to desalinization and desodification estimations, an exponential model with a correlation coefficient of 0.735 and significance level at 1% was selected. In the second model, initial, final and equilibrium salinity, leaching efficiency and moisture content were considered and the fitted exponential model with R2 = 0.758 was determined as the best desodification. A simulation model called leaching process was developed to determine the amount of water and time needed for reclamation of the whole soils of the study area. Two scenarios were presented: scenario I contained initial leaching, barely cultivation and leaving plant residual during warm seasons, scenario II proposed initial leaching and heavy disk operation and then a pre-irrigation operation. Considering lowering consumed water depth for the soil reclamation and also higher yield in the first scenario, scenario I was selected as a best choice.

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