T先生,您的风信子出现的这种形态,我都没有经历过.我种的是在露地,还没试过盆栽的.
看了好多个论坛(英文),都没有相似的问题和解答.最后看到这篇专业的文章,我觉得应该比较能说明您的问题:
作者是美国北卡罗莱纳州立大学园艺系的教授A. A. De Hertogh, Professor
Department of Horticultural Science.
题目是:Home Forcing of Hyacinths
文章提到:强迫提前开花的风信子,(forced Hyacinths)球根的冷冻期为10-13周,冷冻期越长,花越高.如果少于10-13周,会产生矮小甚至不正常形态的花或无花(aborted)
After a minimum of 10 to 13 weeks of cold (Table 1), the first bulbs may be placed in the house. Longer cold storage will result in taller flowers, while storage periods shorter than the required 10 to 13 weeks will result in smaller plants and sometimes aborted or malformed flowers.
看了这文章,我猜测,可能是您的风信子的预先冷冻期不够(pre-chill)
故此有这种状态.回想我的郁金香,种了若干年以后,越来越接近地面,也曾出现过类似的现象.另外,这文章也提到,盆栽强迫开过花的风信子,花后可以种回地里,1-2年后可以再开花:
Spring flowering bulbs that have been forced indoors are usually of little value for outdoor plantings. Hyacinths, however, can be placed outdoors as soon as spring arrives. Many of them will flower after 1 to 2 years in the garden.
另外,看资料得知,风信子开花后,最佳的室温是15-19度C,晚上10度或更低.
附:冷冻处理(Cold Treatment):放冰箱1-6度C,最少10-13周. |