利用优树建立种子园,再从种子园采取优良种子育苗造林,这是目前各国快速发展优质丰产林的有效途径。但这一方法仍有一些缺点。首先是时间长。例如从采穗嫁接到开花结实大约需要10年。其次是从一株优树上采取的接穗也是有限的,不能满足生产的需要。第三是从种子园采收的种子育成的苗木,不一定都具备亲本的所有优良特性。采用组织培养法育成的幼苗不但数量多、质量好,而且时间可以大大缩短。据试验,从一棵优树的组织可以培养100万株幼苗,其优良特性完全和母本优树相同,而且从初取组织进行培养到成为小苗前后 The use of excellent trees to establish seed orchard, and then from the seed orchard to take good seedling and afforestation, which is currently an effective way to rapid development of high-yielding forests in various countries. However, this method still has some shortcomings. The first is a long time. For example, it takes about 10 years from grafting to flowering and fruiting. Followed by the scion taken from a tree is also limited, can not meet the production needs. The third is seedlings harvested from seeds orchards that do not necessarily possess all the fine qualities of their parents. Tissue culture method of breeding seedlings not only a large number, good quality, and time can be greatly reduced. According to the experiment, from a tree organization can cultivate 1000000 seedlings, its excellent characteristics and maternal tree exactly the same, but also from the beginning to take tissue culture to become before and after the seedlings