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在1974年繁殖苹果矮化中间砧果苗过程中,观察到以山定子为基砧春季切接M_2、M_4和M_7,其成活率分别为61.0％、36.5％和46.9％,夏季芽接成活率分别为60.8％、73.1％和70.6％。这说明嫁接时期的适宜与否和成活率有关。而嫁接后能够成活的主要原因,除了亲和力因素之外,便在于形成层的作用。那么不同型号的果苗在不同生长时期的维管形成层活动与变化情况如何,它与嫁接成活率的关系怎样,便成为我们进行本项观察研究的主要目的。在多年生产繁殖的基础上,对不同型号矮砧的一年生枝条进行了两年的解剖观察,以探求维管形成层的活
During the seedling emergence of apple dwarfing intermediate anvil in 1974, the survival rate of M_2, M_4 and M_7 was 61.0%, 36.5% and 46.9% respectively in spring, and the survival rate of budding in summer was 60.8%, 73.1% and 70.6%. This shows that the appropriate grafting period and survival rate. The main reason for survival after grafting, in addition to affinity, lies in the role of formation. Then the different types of fruit seedlings in different growth stages of the vascular layer of activity and changes in how it relates to the graft survival rate, we have become the main purpose of this observation and research. On the basis of years of production and reproduction, the annual branches of different types of dwarf anvil were dissected for two years for the purpose of exploring the survival of the vascular cambium