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Evaluation of irrigation scheduling and yield response for wheat cultivars using the AquaCrop model in an arid climate

Yield, soil water balance components and evapotranspiration-based water productivity (WPET) of three winter wheat cultivars were investigated using the AquaCrop model under arid conditions in Shiraz, Iran, for two consecutive years. The irrigation treatments were non-stressed (I1) and post-anthesis...

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Published in:Water science & technology. Water supply 2022-01, Vol.22 (1), p.602-614
Main Authors: Amiri, E., Bahrani, A., Irmak, S., Mohammadiyan Roshan, N.
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description Yield, soil water balance components and evapotranspiration-based water productivity (WPET) of three winter wheat cultivars were investigated using the AquaCrop model under arid conditions in Shiraz, Iran, for two consecutive years. The irrigation treatments were non-stressed (I1) and post-anthesis water stress (I2) with three wheat cultivars. Evaluation of the model was performed using the coefficient of root mean squared error (RMSE), normalized RMSE and R2. The AquaCrop model performed well in simulating grain yield and final biomass production with R2 > 0.90, and RMSE and normalized RMSE values less than 10. The I1 treatment resulted in higher grain yield and biomass productivity than the I2 treatment. The I2 irrigation resulted in yield reduction of 21 and 24% in the 2006–2007 and 2007–2008 growing seasons, respectively, as compared with I2. Using the measured grain yield and AquaCrop-simulated water balance, the amount of WPET was found to vary from 0.68 to 0.95 kg m−3. The AquaCrop model was able to predict winter wheat biomass and yield production with a good accuracy in the arid conditions of this study and its ability to simulate these variables for different wheat cultivars' was especially notable. The AquaCrop model can be used to explore management scenarios to improve wheat water management in the study region.
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subjects Accuracy
Agricultural production
Agricultural research
aquacrop model
Arid climates
Aridity
Biomass
Corn
Crop yield
Crops
Cultivars
Evaluation
Evapotranspiration
Food
Growing season
Growth models
Irrigation
Irrigation scheduling
Moisture content
Potassium
Productivity
Root-mean-square errors
Seasons
Simulation
Soil fertility
Soil water
Testing laboratories
Triticum aestivum
Water balance
Water management
water productivity
Water stress
Wheat
Winter wheat
title Evaluation of irrigation scheduling and yield response for wheat cultivars using the AquaCrop model in an arid climate
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