北京4个玉兰种花期物候观测及其分析

Observation and analysis on flowering phenology of four species of Magnolia in Beijing

对北京4个常见玉兰种进行了花期物候和花形态观察、记录并拍照,同时对观测结果进行分析。结果表明:北京市4个玉兰种开花的先后顺序为:望春玉兰(Magnolia biondii)、白玉兰(M.denudate)、二乔玉兰(M.×soulange-ana)、紫玉兰(M.lilifllora);花期由长到短的顺序为:白玉兰、二乔玉兰、望春玉兰、紫玉兰;而低温和干旱是影响玉兰开花规律和花期长短的主要气候因子。

This paper gives some statistics and analyzes the relationship between atmosphere factors and initiated flowering stage of 4 species of Magnolia in Beijing. The experiment was carried out as follows ： observed and noted every sample tree＇ s flowering stages and screened the dissected flowers. The results show that Magnolia biondii is the earliest blooming species,followed by M. denudate,M. × soulangeana and M. lilifllora ; M. denudate has the longest florescence, followed by M. × soulangeana and M. biondii, M. lilifllora has the shortest florescence;lower temperature and drought can affected the florescence rules of Magnolia evidently.