小麦根际环境中铜和铅形态的变化  

Variation of copper and lead fractions in rhizosphere soil

作　　者：陈有 陶澍[1] 邓宝山[1] 张学青[1] 

机构地区：[1]北京大学城市与环境学系,北京100871

出　　处：《环境科学学报》2000年第3期365-369,共5页Acta Scientiae Circumstantiae

基　　金：国家杰出青年基金 (495 2 5 10 2 )

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 .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 2?mm 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.

关 键 词：根际环境 小麦 重金属 铜 形态 铅 土壤污染 

分 类 号：X144[环境科学与工程—环境科学] X530.323.1