城市行道树pH值和电导率与交通环境

The pH Value and Electric Conductivity of Urban Roadside Trees' Bark and Traffic Environment

对南方 18种常见的城市行道树的树皮pH值和电导率进行了测定。研究表明 ,不同的行道树的树皮pH值和电导率不同。对同一树种来说 ,靠近汽车道的行道树的树皮的pH值小于靠近人行道的一侧的树皮的pH值 ;而电导率表现为离汽车道越近或离工厂的污染源越近 ,树皮的电导率越高的规律。树皮pH值和电导率二者可以定性表示交通环境污染的程度。

The pH value and electric conductivity of bark of urban roadside trees grew in the South of china were measured. The research indicated that the pH value and electric conductivity of roadside tree bark changed with the different roadside trees. For the same tree, the pH value of the roadside trees'bark which faced against traffic way was smaller than that faced against pavement; But the larger the electric conductivity of the roadside's bark was, the closer to the traffic way the roadside tree was. The pH value and electric conductivity of tree bark can show the environmental pollution level.