In non-stress conditions, silicon enhanced the growth of shoots of all three rice cultivars in culture solution. As shown in Table 1, added silicon increased the plant height and shoot dry weight. Silicon addition had no effect on the root dry weight, although the root (seminal root) length was slightly decreased. Salt stress decreased the biomass of both shoot and root, and added silicon improved the growth of shoot, as shown by the plant height and shoot dry weight (Table 1). However, silicon addition had no effect on the root length or root dry weight.