In order to find the relationship between road and distribution of invasive species,the study was carried out to research the relationship between the 201 road and the distribution of Ambrosia artemisiifolian in the area of Jingpo Lake National Park.The results showed that with the road distance increasing,the frequency and coverage of Ambrosia artemisiifolia was decreasing,the areas which far away from the road 0-20 m were the central distribution of Ambrosia artemisiifolia; the plant height,density of the inside comer were significantly higher than the outside comer,but the straight stretches of mad along the highway on both sides of Ambrosia artemisiifolia is no significant difference; the study showed that the road play an important role in the spread of Ambrosia artemisiifolia,therefore,for prevention and control the invasion of Ambrosia artemisiifolia,we should focus on the roadside,especially mad curve in the future.%为揭示公路与外来入侵植物分布格局及扩散的关系,对镜泊湖国家地质公园附近201国道豚草沿公路两侧的分布格局进行研究.结果表明:随着与公路距离的增加,豚草的频率和盖度都呈下降趋势,距离公路0～20m处为豚草的集中分布区;微生境对豚草分布有显著影响,弯道内侧豚草的株高、密度明显高于弯道外侧,但是沿公路直路两侧的豚草则差异不显著;说明公路在豚草的扩散过程中起到重要作用,在防治豚草时应以公路沿线为主要防治区域,尤其是公路弯道处.
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