Effects Of Organo-neutralization On The Cd, Pd Uptake Of Crop

The field plot experiments conducted on a Cd~Pb polluted soil with three seasons of rice paddy\peanut with eight treatments including lime(L), calcium magnesium phosphate(G), peat(P), hog manure(M), 1 ime and peat(LP), lime and hog manure, calcium magnesium phosphate and peat(GP), calcium magnesium phosphate and hog manure(GM), nearby steel plant in Xinluo strict Longyan city Fujian province. It showed: each treatment could improve the soil PH, organic matter, alkalized-nitrogen, CEC, rapidly available phosphorus. Treatment G, GP, GM significantly stimulated the growth of the paddy, peanut. The increasing in the paddy was higher than in the peanut. Treatment L, GP could significantly inhibit the uptake of the heavy metals in paddy and peanut. But the contents of Cd in paddy and peanut were far above the guide value of grain crop. Pb in the soil was far above the guide value of soil. But Pb in the rice was accord with the guide value in the first season. In the third season, pb in rice was above the guid value by different variety. Every treatment can significantly inhabiting the uptake of Zn in paddy and peanut, and the contents in the first and third season were accord with the guide value. The effect was complex in inhabiting the uptake of Cu, but the content in the paddy and peanut was very low and accord with the guide value of grain crop. By statistical analysis, the uptake of Zn in paddy, Zn and Cd in peanut was significantly negatively correlated with soil PH. This experience showed that changing the available heavy metals in soil by adjusting soil PH was the main mechanism.The above results showed that the organ-neutralization could inhibit the uptake of Cd, Zn, Pb and adjusting the soil nutrient. However, for the serious polluted with Cd and Pb, the ameliorative measure was not effective enough to depress the Cd and Pb uptake.