国道312线长隧道周边植物生长发育浅析

A brief analysis on plants' growth around the long tunnel of the 312th National Highway

近年来,随着山区交通状况提高,公路隧道的数量越来越多。隧道内的大气污染物分布复杂,废气大量集中排出,会对隧道周边植物的生长产生影响。随着交通量的日益增加,逸出的废气在长时间内不能有效的扩散,会持续造成危害。研究通过对312国道两条长隧道处8种植物的形貌、叶片叶绿素含量及叶片细胞膜相对透性进行实地采样以及实验检测,得出这8种植物在交通污染影响后的生长情况,并进行简要分析,给出适宜种植在隧道周边的植物种类。

In recent years, the number of highway tunnels in mountain-area is increasing with the improvement of local traffic conditions. The exhaust gas from these highway tunnels with complicated composition tends to be the emission source of concentrative atmospheric pollutants, which exerts great influence on the growth of surrounding plants. This harmful effect could be long-lasting as the increasing traffic volume leads to the failure in the effective diffusion of exhaust gas. In this study, several growth-related data including the morphology index, leaf chlorophyll content and leaf relative membrane permeability of eight kinds of resident plants were field sampled and investigated to probe into the practical influence of air pollutions from tunnel traffic on the growth of plants around tunnels in the 312 th national highway in Shaanxi Province. And botanic species suitable for planting surrounding highway tunnels in corresponding regions was also proposed based on the experimental determination and result analysis.