加拿大一枝黄花为菊科一枝黄花属多年生草本植物,上世纪30年代中期作为观赏植物引进到上海、江苏一带。其种子经风、鸟传播和人为因素扩散蔓延,目前已在慈溪地区大面积发生。由于它具有很强的生长优势,与其它植物强力争光、争肥和争水,压倒其它植物生长,因此已成为重要的外来有 Solidago canadensis is a perennial herb of Solidago canadensis. It was introduced to Shanghai and Jiangsu Provinces as ornamental plants in the mid-1930s. Its seeds spread by the wind, bird transmission and human factors have spread to a large area in Cixi. It has become an important alien species because of its strong growth potential, its ability to compete with other plants for glory, fighting for fertilizer and fighting over water and overcoming the growth of other plants