一、前言随着我国工业生产和交通运输业的迅速发展,环境保护工作已提到重要议事日程。生物防治是其中的一个分支。在这方面,人们愈来愈认识到造林绿化,对改善气候,净化大气污染物是有重要意义的。但是植物种类不同,对改善气候、净化大气的效能就显然不一样,甚至差异很大。有的树种能够在污染区顽强生长,表现出很强的抵抗力,而另 I. Introduction With the rapid development of China’s industrial production and transportation industry, environmental protection work has already mentioned the important agenda. Biological control is one of the branches. In this regard, people are increasingly aware that afforestation is of great significance to improving the climate and purifying air pollutants. However, different types of plants obviously have different effects on the improvement of climate and the purification of the atmosphere, and even vary greatly. Some tree species can stubbornly grow in the contaminated area, showing strong resistance, while the other