摘要
为揭示喜旱莲子草在城市生态系统中随河流扩散格局,以成都市作为典型的河流城市生态系统,对垂直河道40 m内进行样方调查,以群落郁闭度和人为干扰作为环境因子,调查喜旱莲子草在垂直河道不同距离内的扩散格局。结果表明,成都市河道两侧喜旱莲子草呈向外扩散格局;河道两侧喜旱莲子草入侵程度极高,大量其他外来入侵植物也被发现,成都市外来植物入侵形势极为严峻。植物群落郁闭度对喜旱莲子草的扩散过程影响不明显,但人为干扰阻碍了喜旱莲子草的扩散过程。建议成都市利用人工物理防除配合少量化学防除对喜旱莲子草进行清除。
To reveal the invasion patterns of Alternanthera philoxeroides along riverside in city ecosystem,Chengdu was selected as a typical city ecosystem with rivers, and a quadrat survey of plant communities within40 meters vertical along the rivers was conducted. Canopy density and artificial disturbance were studied as environment factors which influence A. philoxeroides invasion patterns at different distance from the rivers in Chengdu. The results show that A. philoxeroides invasion in land ecosystem is associated with distance and shows an outward spread pattern. The invasion degree of A. philoxeroides at riverside is heavy and more alien species are found with A. philoxeroides, the situation of alien species invasion in Chengdu is serious. The canopy density does not influence invasion patterns of A. philoxeroides, but artificial disturbance could prevent A. philoxeroides invasion. It is suggested that artificial disturbance combined with less herbicide should be used to prevent A. philoxeroides invasion in Chengdu.
作者
樊华
苟小林
李玲
李森
涂卫国
罗雪梅
Fan Hua;Gou Xiaolin;Li Ling;Li Sen;Tu Weiguo;Luo Xuemei(Sichuan Provincial Academy of Natural Resource Sciences,Chengdu 610015)
出处
《中国农学通报》
2021年第31期78-85,共8页
Chinese Agricultural Science Bulletin
基金
四川省科技计划重点研发项目“成都市周边外来入侵植物防控与资源化利用技术研究与示范”(2018SZ0312)
四川省外国专家项目“成都市重点入侵植物防控技术研究”(SYZ202034)
四川省省级科研院所基本科研业务费项目“川渝港口外来入侵植物现状调查及风险评估”(AB2109)。
关键词
喜旱莲子草
城市
河流
入侵
环境因素
Alternanthera philoxeroides
city
river
invasion
environment factor
