中文摘要：

【背景】空心莲子草是难以防除的恶性入侵杂草,因此,探索高效无毒的化感防治方法具有重要意义。【方法】利用水浸提法研究了博落回、苦瓜、樟树、柳杉、凤尾蕨、柑橘、夹竹桃、洋葱及大蒜9种植物不同器官对空心莲子草的化感作用。【结果】与对照相比,博落回叶、苦瓜果肉与种子、凤尾蕨、樟树叶和柳杉叶的水浸提液对空心莲子草具有较强的化感作用,主要表现为空心莲子草叶片数和茎节数减少,株高与生物量的增长受到抑制。【结论与意义】不同植物水浸提液对空心莲子草的化感作用有所差异。本研究为利用植物的化感作用控制空心莲子草提供了依据。

英文摘要：

[Background]Alternanthera philoxeroides（Mart.） Griseb,an invasive exotic weed,is difficult to control.Using allelopathy as a potential control method could provide a solution.[Method]Allelopathy of water-based extracts from different organs of nine plant species,Macleaya cordata（Willd.） R.Br,Momordica charantia Linn.,Cinnamomum camphora,Cryptomeria fortunei Hooibrenk ex Otto et Dietr,Pteris multifida Poir,Citrus reticulate Blanco,Nerium oleander L.,Allium cepa Linn.,Allium sativum L.,was assessed on the alligator weed,Alternanthera philoxeroides.[Result]The extracts from leaves of Macleaya cordata,pulp and seed of Momordica charantia,P.multifida appeared to significantly affect Alternanthera philoxeroides.The number of leaves and nodes of Alternanthera philoxeroides decreased,plant height and biomass of Alternanthera philoxeroides was reduced after treated with water-based extracts from leaves of Macleaya cordata,both pulp and seed of Momordica charantia,P.multifida.[Conclusion and significance]The research provides options to develop control methods against Alternanthera philoxeroides via the use of allelopathy.