【摘要】 对湘西外来入侵植物进行了初步调查,结果表明:湘西地区共有外来入侵植物56种,隶属24科.其中菊科最多,为18种,占32.14%.入侵植物中有35种来自美洲,其它种则分别来自欧洲、亚洲、大洋洲和非洲.56种中有意引种、无意引种、自然扩散分别为32种、20种、2种.草本最多,有50种,占89.29%.属的区系成分可划分为9个分布类型,热带成分所占比重最大,有22属,占47.83%.湘西地区的入侵植物的危害可能暂未爆发,但仍需引起相关部门的注意,加强宣传,做好预防和综合控制.更多还原

【Abstract】 56 species of alien invasive plants belonging to 24 families have been found in Xiangxi of Hunan Province through preliminarily investigation.The most abundant family is Compositae including 19 species(32.14%).Among those species,35 species originate from America and others originate from Europe,Asia,Oceania and Africa.The invading paths include intentional(32 species),unconscious(20 species) and natural(2 species),50 species of Herbs account for 89.29% of the total species.Based on their geographical distribution,46 genera are classified into 9 areal-types,and most of them belong to the tropical distribution(22 generas,47.83 %).Although harms of the alien invasive plants have not broken out,government must pay attention to it.Finally,some preventable strategies are suggested.更多还原