EFFECTS OF DIFFERENT MODIFIERS ON DECREASING THE CADMIUM CONTENT OF RICE GRAIN
Deng Boer Liu Tongchou (Huazhong Agricultural University. Wuhan 430070)
Under the pot culture condition. both the inhibitory effect of modifiers such as lime, calcium magnesium phosphate, turf, burned coal ash and green manure modifiers et al on the absorption of cadmium by rice and differences between rice varieties in absorbing cadmium were studied. The results showed considerable variations between rice varieties in enriching cadmium and between modifers in decreasing cadmium content of rice grain. The cadmium content of rice grain was decreased 19.9, 26.6, 35.4 percent by lime of 18.7, 37.5, 75kg/100m~2, respectively, and 30.9, 37.7 percent by the burned coal ash and turf, respectively. Application of calcium magnesium phosphate 150kg/100m~2 was, however, the most effective measure for decreasing the cadmium content of rice grain, meeting the standard of food hygiene. Therefore, application of calcium magnesium phosphate is recommedded for improving cadmium pollution in Daye and decreasing the cadmium content of rice grain.
【CateGory Index】： X45.23