A field experiment was carried out at El-Sirw Agriculture Research Farm at Damietta governorate, Egypt in 2018 and 2019 seasons. This investigation aimed to be study the effect of foliar application of three silicon sources at three rates for each, i.e. nano silica at 50, 100 and 150 ppm and potassium silicate as well as magnesium silicate at 500, 1000 and 1500 ppm for both of them on the productivity of rice plants grown in saline soil. Foliar application of Si at different tested sources and rates significantly increased each of physiological characters (chlorophyll content and stomatal conductance), morphological characters (plant height, number of tillers/ m², leaf area index and dry matter production/ m²), chemical composition in the leaf (K %, K / Na ratio and Si %), yield components (number of panicles/ m², panicle weight and length, number of filled grains/ panicle and 1000 - grain weight), yields/ ha (grain and straw), grain quality characters (hulling % , milling % , head rice %, protein and amylose %), while significantly decreased Na % in the leaf, number of unfilled grains/ panicle and chalkiness grains % as compared with untreated plants (control treatment) in both seasons. Spraying of nano silica at 150 ppm and potassium silicate at 1500 ppm were found to be more efficiency in increasing most abovementioned traits of rice plants grown in saline soil than the other tested silicon sources and rates.