通过天然林优良林分的表型选择,选出优良单株和林分作为固定的采种基地,是在短期内取得遗传品质优良种子的一条多快好省的途径。但是,这些优良单株和林分所具有的优良品质,能否通过种子传给下一代是我们所关心的一个问题。种子活力可以理解为:种子播后,能在范围很广的环境条件下,迅速而整齐地萌发的健壮程度。而这种程度的大小,主要是内部基因和外部环境造成的,因而在一定的相同的环境控制下,通过活力测定可以说明种 Through the phenotypic selection of excellent stands in natural forests, the selection of excellent single plantations and stands as a fixed seed-picking base is a way to achieve a much faster and better province in the short term with superior quality seeds. However, the good qualities of these fine individuals and stands are one of our concerns, whether they are passed on to the next generation. Seed vigor can be understood as: seed sowing, in a wide range of environmental conditions, the rapid and neat germination degree of robustness. And this degree of size, mainly caused by the internal genes and the external environment, so under the same control of the environment, through the determination of vitality can be described