【摘要】 通过列举对我国国民经济和生态环境产生重要影响的外来植物及其来源,阐述了外来植物与外侵植物的区别,并对外来植物的利与害加以辨析,分析了外来植物产生危害的机理,提出了相应防范措施。更多还原

【Abstract】 Some adventitious plants which have important effects on national economy and ecological environments are cited,and the origins of them are given.Some distinctions between adventitious plants and alien plants are elaborated as well.The gains and losses of adventitious plants are discussed.The harm mechanisms are analyzed and some relevant precautionary measures are provided.更多还原