›› 2010, Vol. 49 ›› Issue (增刊01): 80-82.

• 论文 • 上一篇    下一篇

入侵植物薇甘菊与其本地同属种蔓泽兰的叶构建因子比较研究

邓 雄   

  1. (环境保护部华南环境科学研究所,广东 广州 510655)
  • 收稿日期:2010-01-26 修回日期:1900-01-01

Leaf Construction Traits of Invasive Species Mikania micrantha and Its Indigenous Congener M.cordata (Asteraceae) in South China

DENG Xiong   

  1. South China Institute of Environmental Sciences, Ministry of Environmental Protection (MEP),Guangzhou 510655,China.
  • Received:2010-01-26 Revised:1900-01-01

摘要: 研究了华南地区外来入侵种薇甘菊Mikania micrantha H.B.Kunth和它的本地同属种假泽兰Mikania cordata (Burm. f.) B.L.Robinson的叶构建特性因子构建成本(Construction Cost,CC)、叶N含量以及叶面积干质量(Specific leaf area, SLA)。两个种的叶性因子表现出以下的形式:本地种假泽兰的构建成本(CC)和单位叶面积的氮含量比外来种薇甘菊更高,比叶面(SLA)以及单位干质量的叶氮含量显著低于后者。无疑,低CC显示其低能耗及高资源利用率,这也可能是其快速生长并广泛传播的主要机理,因此,植物叶构建成本也可能是评价其入侵潜力的重要因子。

关键词: 薇甘菊, 构建成本, 比叶面, 叶氮含量

Abstract: In South China, the leaf traits of Construction Cost (CC), Leaf Nitrogen Content (Leaf N)、Specific leaf area(SLA)of an invasive exotic weed Mikania micrantha H.B.Kunth and its indigenous close congener Mikania cordata(Burm. f.) B.L.Robinson were studied. The leaf traits of the native and invasive Mikania species followed the patterns: higher construction cost (CC), lower specific leaf area (SLA), as well as lower massbased leaf N for the native species, but M.micrantha had lower areabased leaf N. Undoubted, lower CC indicates the lower energy cost while higher resource use efficiency,and can explain the mechanism of its fast growing and spread. Hereby, CC may be an index for access of invasive potential of

Key words: Mikania , invasive species, construction cost, specific leaf area, leaf nitrogen content

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