前言Hartmann(1953年)曾经指出,油橄榄假如在冬天得不到低温条件是不可能开花的。他曾报导过,种在盆内的油橄榄,在温室条件下(60℉以上)经过秋天和冬天,则不能开花,而只能继续保持枝条的长度与粗度的营养生长。而同样一些树,当冬天暴露在加里福尼亚州台维斯地区自然条件下,则能在翌春繁盛 Foreword Hartmann (1953) once pointed out that it is impossible for olive to flowering if it is unable to get cold in winter. He has reported that the olives planted in the pots can not flowering under the greenhouse conditions (above 60 ° F) through autumn and winter, but only to maintain the vegetative growth of the branches’ length and thickness. And the same trees, when exposed to natural conditions in Davis, California, during the winter, thrive in the following spring