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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。
This paper reports that wheat on a highway with a traffic volume of 1900-2100 vehicles / day has a certain absorption and enrichment effect on lead in automobile exhaust. The content of lead in all parts of its leaves: leaf> stem> fruit, leaf as its main absorption and enrichment sites, lead from wheat leaves to other parts of the limited ability to operate. The lead content in wheat leaves and soil around the road was significantly higher than the control point. The content of lead in wheat leaves increased with the increase of exposure time. The content of lead in wheat leaves 1 (seedling stage)> wheat leaf 3 (mature stage)> wheat leaf 2 (middle stage). The lead content of wheat leaves along the highway is obviously related to the distance from the highway. This study suggests that lead in automobile exhaust may cause some pollution to crops beside the road and may cause potential harm to the human body.