Enrichment Rules of Heavy Metals Cd and Ni in Brassica juncea Treated with EDTA

Pot experiment was conducted to study the enrichment rules of heavy metals Cd and Ni in different growth periods of Brassica juncea treated with EDTA.The results showed that with the growth of Brassica juncea treated with EDTA,the concentration of Cd and Ni was higher than the control group.It was indicated that the transfer effect could be improved by EDTA.After analyzing the 6 different growth periods from 28 d to 63 d,the total Cd content in 49 d in the shoot of Brassica juncea accounted for more than 90 % of the whole growth periods,and Ni content was above 80 %.Therefore,49 d was the appropriate time to harvest Brassica juncea.