干旱区污灌土壤作物系统Cu、Zn的行为特性

Behaviors of Heavy Metals (Zn,Cu) in Crops Crown in Wastewater Irrigated Land in Arid Zone

通过对干旱区污灌农田主要作物体中重金属 Cu、Zn生态行为的调查研究得出 :1不同作物对所选研究元素吸收累积的顺序为 :玉米 >小麦 ;不同元素在作物体内迁移能力为 :Zn>Cu。 2作物不同部位研究元素的累积态势为 :根 >茎 >籽。

The behaviors of selected heavy metals (Zn and Cu) in crops grown in wastewater irrigated land were discussed through the field investigation of the toxic metals in arid zone. The paper obtained the following findings: ①The absorption sequence of selected heavy metals in different crops was corn (Zea Mays L.)>spring wheat(Triticum aestivum L.),and the transfer ability of element Zn is better than that of element Cu; ②The accumulation order of the toxic and essential metals in different part of selected crops was: root>sten>graim; ③There is a significant difference in accumulation magnitude of same element in crops grown in the land with different trace metal content.