The Effects Of Different Levels Of Irrigation Water Salinity And Leaching On The Amount And Distribution Pattern Of Soil Salinity And Ions In An Arid Region

Soil salinity is a major environmental factor limiting the productivity of agricultural lands. To determine the effects of irrigation water salinity and leaching on soil salinity and ion concentrations, a field experiment was conducted on a silty-clay soil. The experiment consisted of three irrigati...

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Bibliographic Details
Published in:WIT Transactions on Ecology and the Environment 2014-01, Vol.185, p.33
Main Authors: Mansouri, H, Mostafazadeh-Fard, B, Neekabadi, A
Format: Article
Language:English
Subjects:
Agricultural land
Agricultural management
Agricultural production
Arid regions
Arid zones
Calcium
Chlorine
Clay soils
Computer simulation
Crop yield
Electrical conductivity
Electrical resistivity
Environmental factors
Factorial design
Ions
Irrigation
Irrigation water
Leaching
Levels
Magnesium
Moisture content
Salinity
Salinity effects
Salts
Sodium
Soil depth
Soil layers
Soil management
Soil moisture
Soil salinity
Soil water
Sustainable agriculture
Water content
Water depth
Water management
Water salinity
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Summary:Soil salinity is a major environmental factor limiting the productivity of agricultural lands. To determine the effects of irrigation water salinity and leaching on soil salinity and ion concentrations, a field experiment was conducted on a silty-clay soil. The experiment consisted of three irrigation water salinity levels (2, 8, and 12 dS/m) with/without leaching levels of 4, 19, and 32% under two irrigation water management scenarios. Using factorial design, four replications for each treatment were used. Under leaching, more salts were accumulated at the lower depths of soil. The distribution pattern of different ions was drawn by using measured data. Then the results were simulated by a calibrated SWAP (Soil, Water, Atmosphere and Plant) model. The R-squared value showed that SWAP is usable to predict soil salinity and ion amounts. This should allow users to examine efforts aimed at sustainable agricultural production and profitable yield in arid regions.
ISSN:1746-448X
1743-3541
DOI:10.2495/SI140041