Study of The Effect of Saline Water on Rice Yield under Water Stress Conditions

The aim of this study is to assess the consequences of coincidence of water and salinity stress on yield of a popular local rice variety. A factorial pot experiment using a randomized complete blocks design with three replications was carried out at the Rice Research Institute of Iran, Rasht. Five different levels of water salinity and five irrigation regimes were considered in this study i.e. water salinity treatment: fresh water (1 dS/m, as control), 2, 4, 6 and 8 dS/m and irrigation regimes: full irrigation, AWD (Alternative Wetting and Drying), and irrigation at 100, 90 and 80 percent of field capacity (FC). Yield and yield components were determined at the end of the season. The result showed that salinity stress has a severe effect on rice yield and yield components. The results showed that when the irrigation water salinity is lower than 1 dS/m, intermittent irrigation is relevant.