小叶丁香开花习性的观测与分析

摘要

Syringa microphylla Diels that cultivated in Changchun was taken as materials to observe flowering phenology characters ,the results indicated that flowering changes of different years were be-tween 14~16 d ,full-bloom stage was 8~9 d ,the discrepancy of first -flowering dates was 6 d .Flow-ering phenology had a significant correlation with winter and spring temperature ,phenology of first -flowering dates was ahead of time by high temperature drift in winter and spring ,on the contrary ,it was delayed .Syringa microphylla Diels had secondary flowering characteristics ,the first flowering phase was in May ,and the second was from the mid July to early September .%以长春市栽培的绿化树种小叶丁香为材料，观测花期物候特征，结果表明：不同年份的花期变化在14～16d之间，盛花期为8～9d，始花期相差6d。花期物候与冬季温度和春季温度之间有极显著的相关性，冬季、春季温度偏高的年份始花期物候提前，反之始花期物候延迟。小叶丁香具有二次开花特性，第一次花期为5月份，第二次开花为7月中旬～9月上旬。