果树实生苗的童期为种子萌发到实生苗具有形成花芽能力前的一段时期。果树童期的研究,一直受到果树育种工作者的重视,特别是象苹果等童期较长的树种更是如此。国内外学者曾对杂种实生苗的茎干粗度和植株高度与开花早晚的相关进行过研究,但试验结果不尽一致,本研究主要探讨苹果杂种实生苗的童程、干周与童期的关系以及童区的变化等问题。 Fruit tree seedlings of childhood germination of seed to seedlings have the ability to form flower buds before a period of time. The study of fruit tree childhood has always been valued by fruit tree breeders, especially since the longer species such as apples are older. Scholars at home and abroad have made researches on the stem thickness and plant height of hybrid seedlings and the correlation between the plant height and flowering date. However, the results are not consistent. This study mainly explored the children’s programs of apple hybrid seedlings, dry weeks and childhood Relations and changes in children’s area and other issues.