研究论文
陈有,陶澍,邓宝山,张学青.小麦根际环境中铜和铅形态的变化[J].环境科学学报,2000,20(3):365-369
小麦根际环境中铜和铅形态的变化
- Variation of copper and lead fractions in rhizosphere soil
- 基金项目：国家杰出青年基金(49525102)
- 作者
- 单位
- 陈有
- 北京大学城市与环境学系, 北京 100871
- 陶澍
- 北京大学城市与环境学系, 北京 100871
- 邓宝山
- 北京大学城市与环境学系, 北京 100871
- 张学青
- 北京大学城市与环境学系, 北京 100871
- 摘要：采用根垫法研究了小麦根际土壤中铜和铅形态的变化,研究结果表明:根际土壤中交换态铜的含量显著增加,0—5mm范围内交换态铜增加110%.碳酸盐结合态铜含量则有所下降.这样的根际影响随着距离根系距离的加大而减弱,铜形态变化主要发生在0—2mm范围内.铅的形态则没有发生这样的变化.
- Abstract：Fractionation of copper and lead in wheat rhizosphere were investigated using root-box technique.The soil samples from both rhizosphere and non-rhizosphere were extracted using a sequential extraction procedure.It was demonstrated that the availability of copper in the wheat rhizospere soil increased significantly especially within 2mm at the top layer, indicated by increase in exchangeable fraction and decrease in carbonate fraction.No such change was observed for lead at the exact same condition.
- Key words：Soil rhizosphere wheat copper fractionation
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