基于PRA入侵植物对河南省生态风险性研究

在对河南省入侵植物的种类、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12种危害严重的入侵植物对河南省生态环境的风险性进行了定量分析和排序,结果表明,空心莲子草、野胡萝卜、皱果苋、北美独行菜、反枝苋、土荆芥和王不留行的生态风险性R值为2.08到2.36,均在2.0~2.7之间,危险程度均为3级,在河南都具有中度危险性,禁止引进;铺地藜、刺苋、斑地锦、小花山桃草和无瓣繁缕在河南的危险程度均为4级,入侵危险性低,可以引进,但应采取措施以控制其风险.

Ecological Risk of lnvasive Plants in Henan Province Based on PRA

In this article,based on the survey on species,distributing area,invasion mechanism of invasive plants in Henan Province,12 kinds of invasive plants with serious harm are used to study risk of invasive plants in ecological environment by PRA(Pest Risk Analysis) method.It is discovered,the ecological risks R value of Arternanthera philoxeroides,Daucus carot,A.viridis,Lepidium virginicum,Amaranthus retroflexu,Chenopodium ambrosioides,and Vaccaria segetalis both ranged from 2.08 to 2.36,belong to 2.0～2.7,the degree of risk is the three-tier,so these species have moderate risk,and should forbid to be introduced into Henan.However,C.pumilio,A spinosu,Euphorbia maculata,Gaura parviflora and Stellaria apetala take on lower degree of risk,belong to fourth-tier in Henan,therefore,these four species can be introduced,but measures should be taken to control its risks.