中文摘要：

利用1980—2012年南京市8种常见观赏树木的花期物候资料,系统分析了这些树种的初花、盛花和末花期以及花期等的长期演变规律,结果发现：1）在南京市常见观赏植物花序中,开花较早的有绿萼梅、杏梅等,其次为日本樱花和广玉兰等,而紫薇和喜树开花较晚;花期最长的是紫薇,其次为合欢和广玉兰,日本樱花、绯红晚樱花期则较短;2）南京市观赏植物初花、盛花和末花期有明显的年际变化,积温可能是影响南京市植物花期年际变化的主要影响因素之一,并且对春季开花的植物影响要更大一些;3）利用有效积温可以很好地模拟南京地区观赏植物初花、盛花和末花期,以及花期长短等。该研究可有助于系统了解南京地区主要观赏植物花期的演变特征,为开展花期预报提供背景资料,为南京园林绿化树种的选取提供一定帮助。

英文摘要：

Based on the data of 8 common ligneous plants in Nanjing, the variation of inflorescence of plants was analyzed. The results showed that： 1） the inflorescence of Armeniacamume Sieb. cv. Viridicalyx and Armeniacamume Sieb.var. bungo（Mak.） Yu et Lu appear earlier which can be found on March, while the blooming date of Lagerstroemia indica L. and Camptotheca acuminate Decne. was found late which always occurs in summer.. And the Lagerstroemia indica L. has a longer flowering phase while Prunusyedoensis Matsum. and Cerasuslannesiana Makino var. hatazakura Wils. have a short flowering phase; 2） The variabilities of florescence of ligneous plants vary greatly and the accumulated temperature has a great impact on florescence of ligneous plants in Nanjing, especially for the florescence in spring; 3） Accumulated temperature can be applied to the prediction of florescence of ligneous plants in Nanjing. The study might make a contribution to researching the evolution rule of ligneous plants in Nanjing, as well as provide data for forecasting florescence when people are choosing tree species in urban landscaping.