摘要
以连霍高速中牟段三断面表层土壤为对象,探讨了不同林带对重金属扩散的防护效果差异。结果表明:路旁表层土壤已经受到不同程度的污染。无防护林带断面的6种重金属扩散能力,基本上都明显大于有防护林带的断面。不同重金属的扩散能力是不同的。不同宽度、郁闭度的防护林带在抑制重金属扩散能力方面存在差异。对于Zn、Ni和Cr,林带越宽、郁闭度越大,防护效果也越好。
Three soil sections of Lian-Huo expressway were studied in Zhongmou county.Each sampling section is of different plant barriers character.The results show that roadside soil has been polluted in varying degrees.The dispersion capacity of six kinds of heavy metals in the section,which is no plant barriers nearby expressway,is higher significantly than other two sections,and the capacity of each metal is different to each other.The effect is different of each plant barrier in prevention adjacent soil from pollution,the thicker plant barriers and higher forest closure,the better protective effect for Zn,Ni and Cr.
出处
《水土保持学报》
CSCD
北大核心
2011年第1期105-109,共5页
Journal of Soil and Water Conservation
关键词
高速公路
土壤重金属
林带
防护效果
expressway
soil heavy metal
plant barriers
protective effect