园林树木花期性状与有效积温的关系研究

2007～2009年在河北科技师范学院昌黎校区内对3科40种（品种）园林树木连续3年进行定位物候观测,结合当地气象资料,较系统地研究了河北昌黎地区园林树木始花期、花期天数年份间的变化,以及有效积温与始花期的关系。结果表明,不同年份间蔷薇科、忍冬科树木始花期有效积温存在极显著差异,木犀科树木差异不明显;同一科内不同种（品种）间始花期有效积温差异显著;蔷薇科、木犀科树木的花期天数在不同年份间没有显著差异,忍冬科树木花期天数不同年份间存在显著差异。不同科的树木始花期对年份间生态因子变化的敏感程度有差异,木犀科树木始花期年份间的变化较蔷薇科、忍冬科树木相对稳定。同一科内不同种（品种）间始花期性状变异幅度较大。不同科的树木花期天数年份间的稳定性有差异,蔷薇科、木犀科树木花期天数年份间的变化较忍冬科树木相对稳定。用有效积温预测园林树木进入始花期的早晚,具有广泛的应用价值。

Study on the correlation between florescence and related traits effective accumulated temperature of landscape trees

The research on early flowering stage and flowering days of landscape trees in different years could provide scientific advice for using landscape trees. This paper studied the effective accumulated temperature and the flowering period of landscape tree related to 3 families with 40 varieties by localized observation on phenological phase. The data were analyzed with the DPS software, SPSS software and Microsoft EXCEL. The data about effec- tive accumulated temperature and flowering days of different landscape trees grew in Qinhuangdao city Hebei province were showed. The results showed that there were significant difference in effective accumulated temperature between the trees in Rosaceae, Caprifoliaceae, but there was no significant differences between trees of Oleaceae; there were significant differences in effective accumulated temperature between these trees in the same subject different varieties at the early flowering stage; there were no significant difference in flowering period between the trees in Rosaceae, Oleaceae, but there was significant difference between trees of Caprifoliaceae. Accumulated tempera- ture was used to characterize the early flowering stage, and this method had great spread application value. The trees in different families showed different sensitivity to temperature variation, the trees in Oleaceae showed most stable variation in early flowering stage among three families; the trees in the same subject different varieties showed a wide variation in florescence - related traits at the early flowering stage ; the days of flowering changed in three families in different years, the trees in Rosaceae, Oleaceae showed a more stable variation in flowering period than Caprifoliaceae.