عنوان مقاله [English]
Considering the limited water resources, optimum use of water is necessary. With the use of some materials such as superabsorbent polymers, irregular rainfall and other limited water resources can be used for preservation and storage of water in the soil. Superabsorbent hydrogels with absorption of water and fertilizer minerals and alternating expansion and contraction, improved the physical and chemical properties of soil. To evaluate the effect of superabsorbent polymer on the Lettuce yield and its water productivity, experiment was conducted in a completely randomized design factorial with two treatments of irrigation regime at three levels (60, 80 and 100 percent of crop water requirement) and four superabsorbent hydrogel application (0, 4, 6 and 8 g per kg of soil) in three replication in the research field of Faculty of Water Science Engineering, Shahid Chamran University of Ahvaz. The results showed that the use of superabsorbent and drought stress has a significant effect on yield and water use efficiency and the highest performance (572.3 g) and water use efficiency (63.59 kg/m^3 ) was obtained in non stress conditions (100 percent crop water requirement) and application of 6 g superabsorbent hydrogel per kilogram of soil. Using the above conditions for the production of more yields is recommended.