汽车尾气中铅对公路旁小麦的污染

本文报道了交通量为1900～2100辆/日的某公路旁小麦对汽车尾气中铅有一定的吸收与富集作用。其各部位铅含量水平:叶>茎>果,叶片为其主要吸收与富集部位,铅由麦叶向其它部位的运转能力有限。公路旁麦叶及土壤铅含量显著高于对照点。麦叶中铅含量随其暴露时间增长而增高,麦叶1(幼苗期)>麦叶3(成熟期)>麦叶2(中期)。公路旁麦叶中铅含量与距公路远近有明显的关系。本研究提示,汽车尾气中铅对公路旁农作物有一定污染,并可能对人体产生潜在的危害。

A Study of Lead pollution From Moter Vehicle Emissions and its Effect on Roadside Wheat In Jixian County

The Certain actions of absorp tion and enrichment of automotive emissions of lead on wheat be side highway with traffic density for 1900～2100 auto mobilees per day were reported in this study. Apparent differences were observed a mong various wheat parts for lead level. leaf>stem>fruit. The leaf of wheat is a major part of absorpti on and enrichment. The lead carring ability in the wheat leaf to other parts is definite. The difference between the concentration of lead on wheat leaf andsoil beside the highway is significant from the control point. The concentration of lead in wheat leaf increases by exposure time. The lead coacentra tion in wheat leaf is related to the distance from the highway. This study shows that the automotive emissions of lead not only causes the pollutions of the crops beside highway but also possibly has lat ent harmful effects on human bo dy. Auto mobile exh aust. Lead. Wheat. Environ mental Pollution.