Journal of New Approaches in Water Engineering and Environment
Scientific Journal

Simulating the yield and water use efficiency of quinoa using the AquaCrop model

Document Type : Original Article

Authors

Bijan Haghighati 1
Atefeh Sayadi Shahraki 1
Mohammad Reza Emdad 2

1 Soil and Water Research Department, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shahrekord, Iran

2 Department of Irrigation and Soil Physics, Soil and Water Research Institute, Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran

https://doi.org/10.22034/nawee.2025.484349.1110
Abstract
Objective: Nowadays, optimal management of irrigation water is very essential issue and valuable tools calls irrigation management models to improve for this optimizing and facilitating.

Methods: For this purpose, aresearch was conducted with the aim of simulating the yield and water use efficiency of quinoa plant using the AquaCrop model at the Shahrekord Chahartakhteh Research Station located in the Agricultural and Natural Resources Research Center of Chaharmahal and Bakhtiari Province during two crop years (2019-2020). The data of the first year were used for calibration and the data of the second year were used for validating the model. In this regard, 3 water treatments were selected as 30, 50, and 70 percent of usable water discharge in three replications and three stages of initial growth (I), development (D), middle (M), and final (F).

Results: The results showed that the highest and lowest yield and water use efficiency of quinoa were observed in full irrigation treatments and 70% water draining treatment of the plant, respectively. Also, water stress at the rate of 50 and 70 percent of usable water discharge in different stages of quinoa growth has led to a decrease in yield and water use efficiency. Also, the calculated statistics show the high efficiency and accuracy of the AquaCrop model in simulating the yield and water use efficiency of quinoa; So that the values of RMSE, EF and d statistics were obtained for yield 0.33, 0.85 and 0.9 and for water use efficiency 0.4, 0.89 and 0.92 respectively.

Keywords

Biomass
grain yield
Dificit Irrigation
Modeling
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Journal of New Approaches in Water Engineering and Environment
Volume 4, Issue 1
March 2025
Pages 28-39

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