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Paper Information

Journal:   IRANIAN JOURNAL OF SOIL AND WATER RESEARCH   FALL 2015 , Volume 46 , Number 3; Page(s) 487 To 498.
 
Paper: 

EVALUATION OF AQUACROP VS SALTMED MODELS TO ESTIMATE CROP YIELD AND SOIL SALINITY

 
 
Author(s):  HASSANLI MOHAMMAD, AFRASIAB PEYMAN, EBRAHIMIAN HAMED*
 
* DEPARTMENT OF IRRIGATION AND RECLAMATION ENG., COLLEGE OF AGRICULTURE AND NATURAL RESOURCES, UNIVERSITY OF TEHRAN
 
Abstract: 

Application of simulation models is a strategy in agricultural water usage management and in predicting the effect of saline water on crop yield and as well on soil salinity. Recently, FAO has introduced a new version of Aqua Crop model through which one can calculate the effect of irrigation water salinity on crop yield and on soil salinity. In the present study, Aqua Crop and SALTMED models were evaluated under alternate application of saline vs fresh water for maize as a forage crop. The required field experiments were carried out in nine treatments (under different conditions of using non-saline vssaline water) in Karaj region. In SALTMED model, R2 values were obtained 0.843 and 0.733 for soil salinity and crop yield, respectively, while these values amounted to 0.758 and 0.846 respectively, for Aqua Crop model. Relative error in Aqua Crop model varied between 2.9 and 30.8% in crop yield estimation and between 5.9 and 45.8% in soil salinity estimation. The relative error in SALTMED model ranged from 0.9 to 24.7% to estimate crop yield while ranging from -2.2 to 38.2% in estimation of soil salinity.

 
Keyword(s): SIMULATION, CYCLIC USE OF SALINE WATER, DRIP IRRIGATION, FORAGE MAIZE
 
References: 
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