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对苗木营养繁殖,除外界的环境条件影响其生根、发芽和成苗外,繁殖材料本身所具有的许多内在因素,如树种的遗传特性、生根的抑制物质、母树的年龄、繁殖材料的发育状况和部位、插穗的大小以及其含水状况等,对育苗的质量和成败,同样有着重要的影响。 一、树种的遗传特性 各个树种在自然选择过程中,形成了各不相同的繁衍方式:一部份树种适宜于种子繁殖,另一些树种则宜于无性繁殖。由于不
The vegetative propagation of seedlings, in addition to external environmental conditions affect its rooting, germination and seedlings, the reproductive material itself has many intrinsic factors, such as the genetic characteristics of species, rooting inhibitory substances, the age of the parent tree, reproductive material development status And parts, cuttings size and its water status, the quality of seedlings and success or failure, also has an important impact. First, the genetic characteristics of species Each species in the natural selection process, the formation of different ways of reproduction: part of the tree species suitable for breeding, while others are suitable for asexual reproduction. Because no