Study on Accumulation and Partition of Cd2+ and Pb2+ in Zizania latifolia
Change of the Cd2+ and Pb2+ accumulation in leaves, culms, roots and galls of Zizania latifolia were studied on single-harvested cuhivar Jiangshujiao and double-harvested cultivar Fenghongzao which cultured in soil with Cd2+ 100 rag/L, Pb22+ 1 000 mg/L and their combined stress. The accumulative coefficient of roots Zizania latifolia of were also de-termined. The results showed that, the Cd2+ and Pb2+ accumulation in different tissues of Zizania latifolia were in the order of root>culm>leaf>gall. Accumulation of Cd2+ and Pb2+ in different tissues of Zizania latifolia was lower when treated with organic fertilizer than with inorganic fertilizer. Treated with single stress, it was also lower than with combined stress. The Cd22+ accumulation in Fenghongzao tissues was higher than those in Jiangshu, but the Pb2+ accumulation was lower. The accumulative coefficient of Cd2+ and Pb2+ in toot of Zizania latifolia was lower when treated with organic fertilizer than with inorganic fertilizer. Treated with single stress, it was also lower than with combined stress.