Effects of heavy metal (Cu/Cd) with and without Si (1.0 mM) application on physiological parameters of rice plants. Surveys of all the physiological parameters were recorded after 1, 5 and 10 days treatments (DAT). In the figure, number indicated different treatments (1- Control; 2-Si; 3- Cu; 4- Cd; 5- Cu + Si; 6- Cd + Si). A - chlorophyll contents; B - Shoot length; C - Root length; D - Shoot fresh weight; E - Root fresh weight of the rice plants. Bars represent means of 81 plants that is the sum of three replications per treatment ± standard error. Means denoted by the same letter were not significantly different at P > 0.05 by Duncan Multiple Range Test (DMRT).