Determining the Optimal Irrigation Amount and Salinity in Quinoa by Surface-Response Method

Articles in Press

Document Type : Research Paper

Authors

1 phd student, Department of Water Engineering, College of Water and Soil, University of Zabol, Zabol, Iran

2 Department of Water Engineering, College of Water and Soil, University of Zabol, Zabol, Iran

3 Department of Water Engineering, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Ahvaz – Iran

4 Department of Water Engineering, Islamic Azad University of Ahvaz, Ahvaz, Iran

Abstract

Quinoa has been introduced as one of the crops to ensure food security in the world, which can tolerate water and drought stress. . To achieve this goal, the present research was conducted in a research farm located in Baghmelk city, in the east of Khuzestan province, . In this research, the quinoa was grown under pulse drip irrigation. Irrigation water was supplied between 60% and 100% of the water requirement (code -1 to +1) in different plots. Applying salinity treatment with two water sources with salinities of 0.5 and 0.6 dS.m-1. Thus, in the absence of salinity stress (code +1), pulse irrigation was done with three fresh water pulses. In the conditions of full salinity stress (code -1), pulse irrigation was done with three pulses of saline water. Response-surface method was used to determine the optimal amounts of these parameters. The results showed that in the optimal state, the dry weight of fodder was equal to 684.5 and the wet weight of fodder was equal to 2482.7 kg.ha-1. In addition, the percentage of fiber and soluble sugars of fodder reached 0.15 and 10.4%, respectively. The optimal amount of irrigation water was equal to 60% of the water requirement and the pulse method code was equal to zero. In fact, if the pulse irrigation method is done in the form of fresh water-salt water-fresh water and by providing 60% of the water requirement of the quinoa; optimum values for quantitative and qualitative parameters of quinoa fodder are obtained.

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Iranian Journal of Soil and Water Research

Articles in Press, Accepted Manuscript
Available Online from 24 September 2024

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