摘要
研究了闽西某钢铁厂附近污染农田上水稻对土壤镉、铅、铜、锌的富集规律。结果表明,①糙米对各元素的富集系数依次为镉(0.25)>锌(0.18)>铜(0.11)》铅(0.0006)。②在土壤一根系、根系一茎叶、茎叶→糙米这几个部分之间,镉和铜从根系向茎叶的迁移最困难;从土壤到糙米,铅的迁移能力逐渐降低;土壤锌比较容易进入水稻根系,但从根系向地上部迁移则较难。③不同田块水稻糙米对土壤镉的富集系数变异比锌和铜大得多,说明影响糙米对土壤镉富集的因素比较复杂。
The enrichment of Cd, Pb, Cu and Zn by rice in the heavy-metal polluted soils near a smelting plant was investigated. The enrichment coefficients of the metals absorbed by brown rice ranged in the order of Cd>Zn>Cu >>Pb. The migration of Cd and Cu was found to be more difficult from root to stem and leaf to compare with those from soil to root and from stem and leaf to brown rice. Zinc and lead were absorbed more easily from the soil to root, but difficulty migrated from root to brown rice. The enrichment coefficients of Cd from soil to brown rice differed more greatly than those of Zn and Cu among the different sampling sites, indicating that the migration of Cd was affected by more factors than the other two elements.
出处
《福建农业学报》
CAS
2003年第3期147-150,共4页
Fujian Journal of Agricultural Sciences
基金
福建省教育厅资助项目(K98025)
