In order to study the effects of different compound mineral passivators on soil p H and available Cd content,to discuss the effects of passivators on output and cadmium reduction of rice,three passivator sampls were selected in this paper. The experiment was carried out with the dosage of 225 g/m2 and held in filed. The results showed that compared with the blank control,the three passivators could increase the soil p H,decrease the available Cd content,and decrease the cadmium content in rice to some extent. Among them,the passivator M( medic...