中文摘要：

在紫茎泽兰的入侵地滇中地区,于4条公路（其中高级公路与低级公路各2条）旁共选择13个不同光水平下的样地,研究了公路旁紫茎泽兰在3种光水平下分布格局的差异.结果表明3种光水平极显著影响路旁紫茎泽兰的分布（p〈0.001）;高光水平比中、低光水平更促进路旁紫茎泽兰的入侵与向远距离扩散;同样在低光水平下,高等级公路比低级公路更促进紫茎泽兰的入侵与扩散.

英文摘要：

To study the differences of distribution pattern of Eupatorium adenophorum varies with three light level along roads, 13 sites in different light level were selected along 4 roads （Among them there were two high-grade roads and two low-grade roads respectively） in the middle area of Yunnan, which was the invaded area of Eupatorium adenophorum. The following results were obtained：light level had a very significant effect on distribution pattern of Eupatorium adenophorum along roads （p 〈 0. 001）; Eupatorium adenophorum might invade more seriously and farther in areas that had high light levels than those had medium or low light level. Plant communities adjacent to high-grade roads might be more invaded by Eupatorium adenophorum than those adjacent to low-grade roads.