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根据2006—2012年白玉兰、日本东京樱和1990—2013年早银桂花期资料和同期气象资料,分析了上述三种园林植物初花期与季节转换的关系。结果表明:白玉兰初花期与入春时间有先有后,东京樱花则一致地晚于入春,其原因是两者初花期要求的5d滑动平均气温不同,白玉兰要求≥10℃,东京樱花要求达≥12℃;早银桂初花期平均比上海入秋日期早11d。这是因为在夏末秋初降温过程中,5d滑动平均气温在22℃以上时就能满足早银桂初花条件,其临界气温高于入秋标准的缘故。
Based on the data of Magnolia grandis from 2006 to 2012, Sakura japonica from 1990 to 2013 and the early flowering period of Osmanthus fragrans from 1990 to 2013 and the meteorological data of the same period, the relationship between the flowering season and the first florescence of the three garden plants was analyzed. The results showed that the first flowering stage of Magnolia grandiflora and the beginning of spring flowering period were the same as that of Tokyo cherry. The reason was that the 5 day sliding average temperature was different for the first flowering stage of the Magnolia grandiflora, Required up to ≥ 12 ℃; Early Silver Gui early flowering date than the Shanghai early autumn date 11d. This is because in the late summer and early fall of the cooling process, 5d sliding average temperature above 22 ℃ can meet the early silver Guihua conditions, the critical temperature is higher than the fall of the standard sake.