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《Chongqing Environmental Science》 1993-06
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EFFECT OF CALCIUM MAGNESIUM PHOSPHAT FERTILIZER ON CHEMICAL FORMS AND TRANSLOCATIONS OF CADMIUM AND CADMIUM UP-TAKING BY RICE IN SOIL

Chao Renlin Huo Wenrui He Zonglan Zhou Yi Wan Jijun Li Yanli (Environment protection Institute of National Agricultural Department Tianjin)  
The various amount of Calcium Magnesium Phosphote fertilizer (CMPF) was incorporated in the acid paddy fields by Cadmium-polluted, The results showed that the partition coefficient of exchangeable Cd in the soil decreased with increase of the amount of CMPF. Negative correlation coefficient reached at sighificant level (r=-0.9314), Oppositely, the partition coefficient of carbonate bound Cd, Fe/Mn oxides bound Cd was evidently positive correlation (r=0.9294), The pH of the soil was close related to the amount of using CMPF (r=0.9395), The amounts of bioavailability Cd was evidently negatively related to the amount of CMPF in the soil (r=-0.8853) , A lot of CMPF was applied in rice-fields by Cd-pollution in a lump, The pH of the soil rised evidently, The partition coefficient of exchangeable Cd decreased significiently, the partition coefficient of carbonate bound Cd, Fe/Mn oxides bound Cd increased evidently. Thus results in the concentration of the bioavailaility Cd in the soil decreased by a big margin. The Cdconcentration for rice plants decreased significiently.
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