Abstract
The author critically reviewed existing researches on soil-plant transfer coefficients or soil-plant relation equations for environmental fate model that estimating transferring metals and metalloids. Although soil-plant relation equations were available for some crops, the equations on staple foods for Japanese were not existed. Soil factors affecting phytoavailability were critically reviewed. Metal concentration in soil, pH in soil, organic carbon contents in soil, and cation exchange capacities (CECs) in soil were often used for dependant variables of soil-plant relation equations, however, another factors should play an important role for explaining variance. Finally, as for a case study, the factors that affect soil-rice transfer of cadmium (Cd) were analyzed. Results showed that a difference of water management condition in a paddy field was a critical factor. The soil-plant relation equation including water management condition successfully estimated Cd concentration in rice from Cd concentration in soil, pH in soil and CECs in soil.
