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作 者 ：张中信;张小平;刘慧君;邵剑文

期 刊 ：武汉植物学研究 2010年 28卷 2期 页码：191-198

关键词：加拿大一枝黄花；入侵种；一枝黄花；本地种；化感作用；

Keywords:Solidago canadensis L., Invasive species, S.decurrens Lour., Native species, Allelopathy,

摘 要 ：

比较研究了入侵物种加拿大一枝黄花(Solidago canadensis L.)与本地物种一枝黄花(S.decurrens Lour.)开花期水浸提溶液对6种受试植物的种子萌发和幼苗生长的影响.结果表明:两种一枝黄花的水浸提溶液对受试植物均有化感作用,但是加拿大一枝黄花地下部分的化感作用比其地上部分强,而本地一枝黄花则相反.两种植物相比较,加拿大一枝黄花地下部分的化感作用比一枝黄花强,而地上部分则相反.本研究表明,加拿大一枝黄花地下部分具有较强的化感作用,通过化感作用对本地植物产生较强的抑制作用,从而形成单一优势群落.化感作用是其成功入侵的重要机制之一.豆科植物对加拿大一枝黄花的化感作用不敏感,因此它们可以作为生物替代控制中优先选择的物种.

Abstract:A comparative study was conducted on the allelopathic effects of water extracts from an invasive species (Solidago canadensis L.) and native species (S.decurrens Lour.) on seed germination and seedling growth of six native plants.The results showed that the allelopathic inhibitory effects of the extracts from both below and above ground parts of S.canadensis were enhanced with increasing concentration.Native S.decurrens showed the same trend as S.canadensis,but in the extracts of S.canadensis from below ground had stronger allelopathic activity to seed germination and seedling growth of native plants compare to S.decurrens.Extracts of S.decurrens from above ground,however,showed stronger inhibition.Our results suggest that S.canadensis may become the monodominant community in invasive areas due to allelopathy,which may play an important role in the successful invasion of S.canadensis in China.Since species of Fabaceae were not sensitive to the water extracts of S.canadensis,they could be used as the priority species in biological replacement control.

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