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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (18): 309-314.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

豚草入侵湖南对植物多样性的影响

邓旭 王娟 谭济才   

  • 收稿日期:2010-03-23 修回日期:2010-05-10 出版日期:2011-09-20 发布日期:2011-09-20

Effect of Invasion of ragweed(Ambrosia artemisiifolia L.) on Plant Biodiversity in Hunan Province

  • Received:2010-03-23 Revised:2010-05-10 Online:2011-09-20 Published:2011-09-20

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摘要： 采用样方法调查了湖南省6个豚草入侵样地中4～10月杂草的种类和数量，分析了其物种丰富度指数、多样性指数和均匀度指数。结果表明，6个样地采得本地植物83种,其中常见本地植物41种，隶属19科。豚草入侵造成6种生境条件下物种丰富度指数、Simpson多样性指数和Shannon-Wiener多样性指数下降显著或极显著，均匀度指数变化小。豚草群落在不同季节物种丰富度指数变化小，多样性指数和均匀度指数在春夏季上升。表明豚草的入侵对生物多样性有不利影响。

关键词: 番木瓜, 番木瓜, 芥子酶, RT-PCR, 表达调控, 活性测定

Abstract: A survey was conducted with the square intercept method on species and quantity of weeds in 6 kinds of habitats where ragweed (Ambrosia artemisiifolia L.) grew in Hunan Province，the species richness index, diversity index and evenness index were analyzed. Results showed that a total of 83 indigenous species were collected and among them, 41 species were common indigenous plants, belonging to19 families. Invasion of ragweed caused significant (P < 0. 05 or P < 0. 01) decline of species richness index、Simpson index and Shannon-Wiener index and little change of Pielou evenness indexes in all the habitats involved. The variation in species richness index of ragweed invasion communities in the different season was small ，diversity indexes and evenness indexes were increased in spring and summer. It was suggested that the invasion of ragweed is harmful to biodiversity.