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This study was conducted in a greenhouse located at the soil and water research station in karaj to investigate the effect of salt and water stress on
growth rate and crop yield of 704- hybrid corn. This study was carried out in 160 plastic containers consist of 20 treatments and each with eight replicates. A statistical factorial design was used to analyze the collected data. Irrigation water with different level of NaCI (EC= 2,4, 6, 8 and 0.5 dS/m as a control)
was applied in this study. Water stresses with constant timejnterval of 4, 6, 9 and 14 days and with approximate depletion of 30, 50, 70 and 90% of the soil
water consumption were estimated by determining the soil moisture content and weight of containers. Leaching requirement was estimated base on a 10%
crop yield reduction in order to reduce salt accumulation in the root zone. Both stresses were induced to the 4-Leaf crops and continued till crop
harvesting. Following results were obtained: both salt and water stress reduced the leaf area, dry matter weight and the height of crops. The saline water
treatments (4, 6 and 8 dS/m) reduced crop yield more effectively than the water regime treatments. Saline waters of 4, 6 and 8 dS/m reduced crop yield
about 17, 34 and 49% respectively, as compared with control treatment. In addition, increasing water stress reduced crop yield about 31 %. The maximum
crop yield was correspond to 30 and 50% depletion of soil water treatments with 0.5 and 2 dS/m of salinity.