Rice plants in the closed system percolation with paddy field model showed better vegetative growth and
grain yield than those in the open system percolation. In experiment ①, plant height, number of stems and
dry matter weight of rice plants were higher than for experiment ② but no difference was found for heading
time. The weight of grains and filled grain ratio were also higher in experiment ① than experiment ② (Table
2). High cadmium uptake in rice plant might have an adverse effect on growth and yield of the rice plant as
Zhou et al. (2003) found that rice plant height and grain yield were decreased by about 4 to 5 cm and 20 to
30 %, respectively due to the effect of Cd.