1. In the distribution region of nature

the Amygdalus ledebouriana multiply normally through sexual and non-sexual reproduction. The essential reason which limited expausion of distribution region is the spread factors of seeds. 2. The average life-span of plant bodies above the ground are 10.6 years. The diameter and height increment in the early five years is faster than the latter

so that the useful value of the short stock is limited. 3. The rhizome of the Amygdalus ledebouriana can not be harmed by fire or other natural calamities

and its vegatation can renew and rejuvernate from the rhiz- ome on the fire slash.