Effects of water table management on soil salinity and alfalfa yield in a semi-arid climate |
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| Authors: | Hamideh Noory Abdol-Majid Liaghat Mohamad Reza Chaichi Masoud Parsinejad |
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| Institution: | (1) Department of Irrigation and Reclamation Engineering, University of Tehran, Tehran, Iran;(2) Department of Agronomy, University of Tehran, Tehran, Iran;(3) Department of Irrigation and Reclamation Engineering, Agriculture and Natural Resource Campus, University of Tehran, Tehran, Iran |
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| Abstract: | A lysimeter experiment was conducted to investigate the effect of water table management (WTM) on distribution of soil salinity
and annual alfalfa (Medicago scutellata) yield. Subirrigations with three levels of water table namely, 0.5 (WT0.5), 0.7 (WT0.7), and 1.0 m (WT1.0) and a free drainage
(FD) conventional irrigation treatment were selected for this study. All treatments were arranged in a complete randomized
block design with three replicates. The results of this study indicated that the average soil electrical conductivity of the
saturated extract (ECe) in the root zone gradually increased and exceeded the designated crop threshold value (4 dS/m) after
the first forage harvest in subirrigated lysimeters. A higher salt accumulation was observed at the WT0.5 treatment. The average
dry matter yield of annual alfalfa in WT0.5 and WT0.7 treatments was found to be 52 and 73% higher compared with the control
treatment, respectively. |
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