不同作物根际环境对土壤重金属形态的影响  

EFFECT OF ROOT SYSTEM ON METAL FRACTIONATION IN RHIZOSPHERE OF CONTAMINATED SOIL

作　　者：陈有鑑[1] 陶澍[1] 邓宝山[1] 张学青[1] 黄艺[1] 

机构地区：[1]北京大学城市与环境学系,北京100871

出　　处：《土壤学报》2001年第1期54-59,共6页Acta Pedologica Sinica

基　　金：国家杰出青年基金!(49525102)资助

摘　　要：采用根垫法研究了玉米、大豆和小麦根际环境对污灌土壤中铜、镉、铅、锌形态的影响。研究结果表明：根际土壤中交换态铜含量呈现增加趋势，碳酸盐态和铁锰氧化物态金属则表现为减少趋势，有机态几无变化。形态变化的幅度与植物种类有关，其中大豆根际土壤中金属形态的变化比小麦和玉米显著。The effects of root system of corn, bean and wheat on the fractionation of copper,lead, cadmium and zinc in rhizosphere in farmland soil irrigated with wastewater were studied. It was revealed that the levels of exchangeable copper increased significantly in rhizosphere soil under influence of wheat, corn, or bean. For bean, metals bound to carbonate and Fe-Mn oxide decreased. No change in level of organic bound metals was detected. It is believed that the dominant transformation processes occurred in the rhizosphere were the transformation of carbonate and Fe-Mn bound metal to exchangeable fraction. The effect of root system of bean was much more notable than that of wheat and corn.

关 键 词：重金属形态 根际土壤 作物 重金属污染 土壤污染 

分 类 号：X131.3[环境科学与工程—环境科学] X530.323.1