Influence of irrigation management and drip irrigation laterals on water use, yield and net benefits in greenhouse cucumber

Document Type : Research Paper



The present research was carried out within the two growing seasons of 2010 and 2011 in Jiroft City, aimed at investigating the effect of different irrigation water levels as well as the pattern of drip irrigation system on the production of greenhouse cucumber. The research was carried on as a split-split-plot design of 16 treatments and three replications by combining the main vs sub-main factors. The main factor included four potential thresholds  of 45 (I1), 55 (I2), 65 (I2) and 75 (I4) centibars for starting irrigation while the sub-main factors included four system patterns as surface (S1) or subsurface (S2) drip irrigation with either one lateral for each cropping row (L1) or alternate laterals (L2). In addition to determining water use and yield, the net return and final output rate was calculated as based on the partial budgeting method, using all ten determined costs and benefits. Results showed that the increase in the potential threshold for irrigation decreased the number of irrigation events and the volume of water use. The minimum (136.36) and maximum (269.11 Mg ha-1) yields were attributed to I4S1L2 and I1S2L1 treatments. Nevertheless, considering a decrease of 11.7% in the volume of water use as compared with  I1S2L1 treatment, I2S2L1 treatment led to only one percentage reduction in yield bringing about the highest net income. Thus, considering the savings of water  and the economic interest of farmers, applying this method for greenhouse production of cucumber in Jiroft would result in an increase in water use efficiency and as well in the final output rate. 


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