浙贝引种到北京，因气候影响，南北两地同期温差大，致使出苗晚，生长期缩短，地下鳞茎逐年变小，因此产生了退化。今介绍促成栽培，可使浙贝出苗期提前，生长期延长，正常开花结实，结合福尔马林浸种，可明显降低鳞茎的病虫为害指数，促使鳞茎增产，大鳞茎比例逐年增高。

Owing to climate influence, mean daily temperature in north China differs greatly from that of the southern regions during the same season. The introduction of Fritillaria thunbergii to Beijing for cultivation was hampered by delayed emergence of seedling and a shortened period for their growth, resulting in degeneration with the underground bulb becoming smaller year after year. With forcing culture as described in this paper, the emergence of seedling came earlier and growth period prolonged. The blossom and fruit became normal.By combining the method with formalin treated seed, diseases and pest index of the bulb were reduced distinctly and the yield increased with increased proportion of larger bulb year after year.