A pot experiment was conducted to study the effects of four modes of water managements on soil Eh values, bioavailability of soil Cd, migration and accumulation of Cd in rice. These four modes of water managements were moistening throughout the entire period of rice growth (M), moistening before filling stage and flooding after filling stage (M-F), flooding before filling stage and moistening after filling stage (F-M), and flooding throughout the entire period of rice growth (F). The results indicated that the exchangeable contents of Cd increased firstly and then declined with the soil Eh val...
