Estimation the actual amount of wheat irrigation water using the NIAZAB system and compare with the farm measurement

Document Type : Research Paper

Authors

1 Associate Professor of Irrigation and Soil Physics, Soil and Water Research Institute, Agricultural Research and Education Organization, Karaj, Iran

2 Assistant professor, Department of irrigation and soil physics, Soil and Water Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran

3 Professor of Irrigation and Drainage Department, Agricultural Engineering and Technical Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran

4 Javad Baghani, Scientific Broad Member, Agricultural Engineering Research Institute (AERI), Agricultural Research Education, and Extension Organization (AREEO), Karaj, Iran

Abstract

Relatively accurate estimation of the amount of irrigation water, water productivity and efficiency of irrigation water application of cultivated wheat in the Iran are important and key indicators in agricultural sector planning. The purpose of this study was to investigate the results of field and farm measurements of irrigation water and wheat yield under farmers' management and compare it with estimating NIAZAB system in 37 township during a crop season (2016-2017) as well as determining wheat water productivity and application efficiency. The results showed that the average amount of wheat irrigation water in the method measured in farms and systems were 5710 and 5894 cubic meters per hectare, respectively, and the average grain yield of wheat in the method measured in farms and systems were 5215 and 4949 kg, respectively. The average water productivity of wheat in the field measurement method and NIAZAB system was 1 and 0.9 kg / m3. The results showed that the NIAZAB system with normal root mean error of 0.19% and agreement coefficient of 0.93 estimates the amount of wheat irrigation water in the township scale and wheat grain yield with normal root mean error of 0.17% and agreement coefficient of 0.95. 0 and estimates the productivity of wheat water with root mean normal error 0.24%, the efficiency of irrigation water application with normal root mean error 0.19% and the coefficient of agreement with 0.93. The values of the efficiency coefficient of the model show that the model provides acceptable results in determining the amount of irrigation water and wheat water productivity in the country's farms. Therefore, the NIAZAB system can be used to estimate the volume required for irrigation of plants in the country and also in farm water management.

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