南充市区绿化植物叶片重金属元素含量及其大气污染评价

通过对南充市区交通流量大的路口区和相对清洁对照区（西华师大新校区）不同植物叶片重金属元素（Pb、Cu、Cd、Zn）含量分析，研究了植物大气环境污染指数，探讨了重金属含量与城市大气污染之间的关系．结果表明，植物叶片中的重金属元素富积量和大气中污染指数正相关．植物叶片的重金属元素富积量可较好和客观地指示市区大气的重金属污染状况．该研究为城市规划和环境保护提供了科学依据．

Contents of Heavy Metal in Leaves of Plants and Air Pollution Evaluation in Nanchong Region

Choosing heavy traffic roads in Nanchong region and new districts of China West Normal university as control sites,the content of heavy metals(Pb,Cd,Cu and Zn) in leaves of different plants was analyzed.The index of air environmental pollution of plants was studied.The relationship between content of heavy metals in leaves of plants and air environmental pollution was discussed.The results show that the heavy metal concentration of Pb,Cd,Cu and Zn in the leaves of plants is significantly related with the index of pollution.The concentration of heavy metals Pb,Cd,Cu and Zn in the leaves of plants can objectively and better indicate the air environmental pollution of heavy metals.It has been proved that this method is a good way in city program and environmental protection by means of using the content of heavy metals in leaves of plants.