Water Management in Agriculture

Water Management in Agriculture

Assessment of rice yield under different irrigation treatments over a long-term weather data with CropSyst model

Authors
Narjes Zare 1
Mohammad Reza Khaledian 2
Nader Pirmoradian 3
Mojtaba Rezaei 4
1 MSc. Student, Irrigation and drainage, University of Guilan, rasht,Iran
2 Assistant professor, Faculty of Agricultural Sciences, University of Guilan, Rasht and Dept. of Water Engineering and Environment, Caspian Sea Basin Research Center, Rasht, Iran
3 Assistant professor, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran.
4 Rice Research Institute, Rasht, Iran
Abstract
CropSyst model is one of crop models that is being used by researcher in recent years. One of the unique characteristics of CropSyst model is a multi-crop and multi-year that provides long time analysis. This model is used for long time assessment after excellent calibration and validation in Rasht in 2005-2007 (measurement of CRM and NRMSE on validation year for rice were 0.11 and 9.7%, respectively). Results of running model were presented after collection data of determined years. In this study, different irrigation treatments were simulated and yield of each treatment was determined. Water productivity based on evapotranspiration was used in assessment. Because of results water productivity were variable in 0.42 to 1.01 kg m-3. Three day irrigation treatment was selected as optimum treatment after analyzing of model outputs.
Keywords
Irrigation treatments
Long time analysis
Rice
Simulation
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Water Management in Agriculture
Volume 2, Issue 1
September 2015
Pages 49-56