【摘要】 在316国道华容至鄂州临江段，通过对不同绿带后0～20 cm土层的土壤铅、铜。锌含量的测定，结果表明：①0～150 m范围内 3种重金属元素含量的平均值为双行绿带区＜单行绿带区＜元绿带对照区。绿带对公路旁土壤中的重全属污染有根好的防护作用，可有效地降低污染程度、缩小污染范围，双行绿带的防护作用优于单行绿带必上壤中铅、铜、锌的含量均随距公路距离的增加而降低，其中锌含量与采样距离呈极显著的负相关关系。③3种重金属元索间均呈正相关关系，其中铜与锌呈极显著的正相关关系。更多还原

【Abstract】 This paper studied Pb.Cu and Zn concentration in roadside soil of National highway 316.The results showed: (1 )The mean values of concentration of Pb,Cu,Zn within 0-150m were:double - greenbelt<single- greenbelt<non-greenbelt.The range of heavy pollution behind greenbelt was smaller than that behind non-greenbelt. (2)Pb,Cu,Zn levels in roadside soils decreased when the distance from highway increased. The concentration of Zn decreased very significantly. (3)there were also correlation among the concentrations of Pb,Zn and Cu. There was very significant correlation between Cu and Zn.更多还原