H. Sadrghaen; M. Akbari; H. Afshar; M.M. Nakhjavanimoghaddam
Abstract
Abstract
This study was conducted to determine the impacts of different drip irrigation method and amount of water on yield and water use efficiency of tomato in Varamin Agricultural Research Center, Iran. The study was done during two years. Experimental design was randomized complete blocks design ...
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Abstract
This study was conducted to determine the impacts of different drip irrigation method and amount of water on yield and water use efficiency of tomato in Varamin Agricultural Research Center, Iran. The study was done during two years. Experimental design was randomized complete blocks design (RCBD) in split plot with three replications. Three different drip irrigation method; surface drip irrigation with in-line emitter tubes, surface drip irrigation (tape), and subsurface drip irrigation (tape) as main plot and three different amount of water (50, 75 & 100% water requirement) were as sub-plot. The result showed that subsurface drip irrigation (tape) and 100% water requirement treatment has the highest yield, but there was no significant difference between it and surface drip irrigation with in-line emitter tubes and 75% water requirement treatment. Water use efficiency in surface drip irrigation with in-line emitter tubes with 75% water use and subsurface drip irrigation (tape) with 100% water use were greater than other treatments. According to the results, under no limitation on water resources, the best option is subsurface drip irrigation (tape) with using 100% water requirement and under water limitation the best option is surface drip irrigation with in-line emitter tubes using 75% water requirement.
Keywords: Micro Irrigation, Water Use Efficiency, Tomato, Varamin
M.M. Nakhjavanimoghaddam; H. Dehghanisanij; M. Akbari; H. Sadrghaen
Abstract
Abstract
In order to evaluate the effects of different depths of irrigation by sprinkler irrigation system on water use efficiency (WUE) of new early maize cultivar KSC302, an experiments was carried out in Karj during 2006 and 2007. Experimental design was split plot based on randomized complete blocks ...
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Abstract
In order to evaluate the effects of different depths of irrigation by sprinkler irrigation system on water use efficiency (WUE) of new early maize cultivar KSC302, an experiments was carried out in Karj during 2006 and 2007. Experimental design was split plot based on randomized complete blocks with three replications. Main plots were three irrigation levels: 75%, 100% and 125% ETc (estimating by Penman Monteith model) and sub plots were three plants densities: 80000, 90000 and 100000 plants per hectare. The results showed that increasing in the levels of irrigation from 75% ETc to 125% ETc, has a significant effect on yield. Yield increase in 125% ETc treatment indicated that water requirement has not fully supplied in 100% Etc treatment, and the effect of deficit irrigation was intensified in 75% ETc treatment. Maximum maize WUE was (1.159 and 1.044 kg m-3) for 100% ETc treatment in the first and second years, respectively. Maize WUE of 1.1 kg m-3 was recommended as optimum level to be considered in cropping system for Karaj. Applied irrigation depth for optimum level of maize WUE was 900 mm.
Keywords: Single cross 302 maize, Sprinkler irrigation, Yield , Water use efficiency
