１前言哈尔滨市地处高纬度寒冷地区，四季分明。一年中有半年以上为冬季，生长季短，适宜生长的植物材料贫乏，许多观赏价值高的植物种类因不耐寒而不能利用。目前哈市广泛栽培应用的花卉品种只有３０余种，花期多集中夏季，早春晚秋花卉品种少，且多数是一、二年生草花，... 1 Introduction Harbin is located in the cold high latitudes, four seasons. More than six months a year in winter, short growing season, suitable for the growth of poor plant material, many ornamental value of plant species can not be used because of not cold. At present, there are only more than 30 varieties of flowers widely cultivated and applied in Harbin, with more concentrated flowering periods in summer, less varieties of early-late autumn and autumn flower varieties, and most of them are one-year or two-year-old flower ...