近年来,白果已成为国际市场上的紧俏商品。随着庭院绿化、四旁植树活动的开展,尤其是在推选“国树”、“省树”、“市树”时,许多专家都积极热情地为银杏投选一票,这样一来,银杏苗木实感不足。然而用传统的播种法育苗,则幼苗出土晚,生长期短,苗木不整齐且细矮,产苗量低,病虫害也严重。因此,应迅速采取必要的技术措施,使银杏苗木达到速生丰产。一、精细选种选带外种皮或不带外种皮每公斤320～340粒的大粒种子作为育苗用种。据试验,用每公斤400粒的种子比用每公斤600粒的种子育苗,一年生苗高生长量增加60％,根茎生长量增加40％,单株生物量增加105％。前者每株叶片为12～15枚,后者每株叶片为 In recent years, ginkgo has become a tight commodity in the international market. With the greening of the courtyard, the activities of planting trees on four sides are carried out. Especially in the selection of “national tree”, “provincial tree”, and “urban tree,” many experts enthusiastically vote for the ginkgo. In this way, Real feeling inadequate. However, with the traditional sowing seedling, the late emergence of young seedlings, the growth period is short, irregular and thin seedlings, seedling output is low, pests and diseases are also serious. Therefore, we should promptly take the necessary technical measures to achieve fast-growing ginkgo seedlings. First, the fine selection of species with or without the outer seed coat 320-340 grains per kg of large seeds as seedlings. According to the experiment, the growth of annual seedling height increased by 60%, the growth of rhizomes increased by 40% and the biomass per plant increased by 105%, compared with 400 seeds per kg and 600 seeds per kg. Former leaves per plant for 12 to 15, the latter for each leaf