Naser Arya Azar; Abolfazl Maajnooni Heris
Abstract
For proper use of available water resources in agricultural sector, selection of suitable irrigation system is necessary to provide the crop water requirements. Correct choosing of irrigation system is an important step in optimal application of water and soil resources. Involvement of several influential ...
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For proper use of available water resources in agricultural sector, selection of suitable irrigation system is necessary to provide the crop water requirements. Correct choosing of irrigation system is an important step in optimal application of water and soil resources. Involvement of several influential factors in selection of appropriate irrigation system has made this a relatively complex issue. In this study, application of different irrigation systems were prioritized by climate, water, soil, field, irrigation efficiency, cultural, social and economic information using analytical network process method (ANP) in the Ajichay river basin. Based on the results of the selected criteria, water quantitative and qualitative, irrigation efficiency, and soil had the most effect on the best irrigation system selection with relative weights of 0.222, 0.221, and 0.1539, respectively. Also, the results of the sub-criteria scores showed that the sum of water sub-criteria was the highest, with final score of 0.26815, among the other sub-criteria scores. Finally, the results showed that, among surface irrigation systems, the basin system with a score of 0.15544, among sprinkler systems, the classic system with score of 0.10432, and among localized systems, trickle system with a score of 0.12754 had priority over other systems. Keywords: Suitable irrigation system, Basin irrigation, Classic sprinkler system, Trickle irrigation system
Abdolhamid Mohebi; Majid Alihouri
Abstract
In recent years, larg parts of agricultural lands in the country have been at the risk of degradation because of quantative and qualitative limitations of water resources and soil salinization. Therefore, to increase plant yield per unit of consumed water, proper planning and selection of adaptable irrigation ...
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In recent years, larg parts of agricultural lands in the country have been at the risk of degradation because of quantative and qualitative limitations of water resources and soil salinization. Therefore, to increase plant yield per unit of consumed water, proper planning and selection of adaptable irrigation method for optimum use of the limited water resources is necessary. This study was carried out in randomized complete blocks design with four treatments and three replications at Haji Abad Agricultural Research Station during four years. The treatments of irrigation included surface (basin) and drip irrigation with irrigation depth equal to 75% and 100% net irrigation requirement based on cumulative evaporation from class A pan. The results showed that effects of irrigation treatments on fruit yield, leaf number, leaflet number, trunk perimeter, and plant canopy area were not significant, probably because the applied water based on pan evaporation was more than the actual plant water requirement. But, there was significant difference between water productivity, at 1% probability level. The maximum and minimum water productivity values were obtained in drip irrigation with irrigation depth equal to 75% and in the basin irrigation with a depth equal to 100% of the cumulative evaporation from the class A pan, respectively. The drip irrigation treatment with irrigation depth of 75% of cumulative evaporation from the class A pan is recommendable for date palm plantations.