入侵植物对重庆生态环境的风险分析评价

Pest Risk Analysis and Assessment of Invasive Plants on Environment in Chongqing

在对重庆市入侵植物的种类、分布范围、入侵原因及机制、危害现状等调查的基础上,参照国际上有害生物风险分析PRA(Pest Risk Analysis)方法,将入侵植物对重庆生态环境的危害性进行了定量分析和排序,结果表明:按风险等级由高到低的前10种入侵植物依次为小白酒草、空心莲子草、野胡萝卜、牛膝菊、紫茎泽兰、凤眼莲、三叶鬼针草、钻形紫菀、野茼蒿、红花酢浆草;各物种的危险性综合评价均为三级,具有中度危险性,应引起有关部门的高度重视;并在此基础上提出了相应的风险对策.

Based on investigating the species, range, reasons and mechanism of invasion, jeopardized situation of invasive plants,this paper analyzed these plants in the fields of quantitative analysis and taxis according to the International Pest Risk Analysis Method . The result shows that. according to the level of risk from high to low ,the first ten invasive plants sequence is Conyza canadensis （L.） Cronq, Alternanthera philoxeroides （Mart.） Griseb. , Daucus carota L. , Galinsoga parvi flora Cav. , Eupatorium coelestinum L, Eichhornia crassipes （Mart.） Solms, Bidens pilosa L. , Aster subulatus Michx. , Crassocephalum crepidioides （Benth.）S. Moore（Gynura crepidioides Benth. ）and Oxalis corymbosa DC; the risk level of all these ten plants is of the third, and these plants have middle fatalness, so the related government departments should attach importance to these invasive plants; then on the ground of that this paper proposes the relevant risk strategy.