中文摘要：

以沈阳地区栽培的天女木兰为研究对象，详细观察测定了该树种的物候期、芽萌发形态变化、开花习性以及枝、叶、果的生长动态等生物学特性。结果表明：天女木兰芽在4月上旬开始萌动，生长期约为150d，旺盛生长期从5月上旬到6月中旬，大约50d；5-6月枝、叶、果生长量最大，此期间新梢生长量占当年新梢总生长量（18．3cm）的81％；天女木兰具有“二次开花”现象，第1次开花（主花期）在5月下旬至6月中旬，持续约20-30d，第2次开花在7月末至8月初，花数量少，持续时间短；果实从生长到发育成熟约需90d，成熟期在9-10月。

英文摘要：

Taking Magnolia sieboldii cultivated in Shenyang area as material, the phenophase, morphological changes of buds, flowering habits and branches, leaves and fruits growth dynamics and other biological characteristics were detailed. The results showed that M. sieboldii buds began to sprout in early April,growth period about 150 days,vigorous growth period lasted about 50 days from early May to mid-June;growth amounts of branches,leaves and fruits was the largest in May to June,new shoots growth during this period accounted for 81% of the new shoots total growth （18. 3 em） that year; M. sieboldii had a ＇second flowering＇ phenomenon, the first flowering （the main flowering） in late May to mid-June,lasted about 20-30 days,the second flowering in late July to early August, small number of flowers, short duration;the fruits from growth to mature need about 90 days,maturity in September to October.