三、 The Juvenile period of clonal Propagated Plants 营养繁殖植物的童期 1. TThe juvenile period童期 of clonal plants 2. Shortening of the Juvenile period三、The Juvenile Period of Clonal Propagated Plants 营养繁殖植物的童期 1. The Juvenile Period 童期 of Clonal Plants 2. Shortening of the Juvenile Period