兰友们都熟知春兰盛花期在2～3月,早花品种可早至11月,晚花品种可迟至4月。这是因为春兰花芽的形成必须经历春化(即一段5℃左右的低温阶段),才能开出正常花。这就是兰界普遍公认的“春化理论”。总之,这一理沦限定了春兰花期仅在冬春二季。但是现实中就有这样一些春兰品种,能一年多次开花,花期甚至在夏秋二季。这不由使人对“春化理论”的普遍适用性提出质疑。我这盆春兰采于2003年3月上旬,当时带有3～4箭花,清香可人。我见其为行花,就随便放于屋顶的一株柏树旁任其生长,从未多加照顾。8月1日晨,它绽放出一箭双花,上一朵刚开放(如照)。本人居住贵州遵义地区,此花开前10多天天气持续高温,均在30℃以上,开花日室温更高达36℃,室外骄阳似火,如此酷暑伏天,此春兰居然再次开花,实在让我惊异。到8月5日上一朵花全开,姿、色、香以及大小(两副瓣跨度6.5厘米)都与春季花品没有任何变异。下一朵花蕾紧闭,花期略迟,但大小、色泽也没有任何不同。遗憾的是因叶芽、化芽在5月同时出土,我未能详加 Lan friends are familiar with Chunlan flowering in February to March, early flowering varieties can be as early as November, late flower varieties as late as April. This is because the formation of Chunlan flower buds must undergo vernalization (ie, a low temperature stage of about 5 ℃), in order to open a normal flower. This is commonly recognized in the blue world “vernalization theory ”. In short, this theory limits the flowering season only in winter and spring. But in reality, there are such Chunlan varieties that bloom many times a year, even in summer and autumn. This can not help questioning the universal applicability of the “theory of vernalization.” My pot Chunlan mining in early March 2003, when with 3 to 4 Arrow flowers, fragrance pleasant. I see it as a flower, just casually placed on the roof of a cypress tree to grow, never take care of. On the morning of August 1, it bloomed twice as fast as the last one (pictured). I live in Zunyi, Guizhou, the bloom of more than 10 days before the weather continued to high temperatures, are above 30 ℃, flowering day temperatures as high as 36 ℃, outdoor scorching sun, so cool summer days, this Chunlan actually blossom again, it really surprised me. To August 5 a flower on a full, posture, color, smell and size (both sides of the span of 6.5 cm) are with the spring flowers without any variation. The next flower buds closed, flowering a little later, but the size, color and no different. Unfortunately, due to leaf buds, buds unearthed in May at the same time, I did not elaborate