Light media selection trial was conducted for cultivating micro-propagated seedlings of Betula alnoides. It was indicated that the media, clones and their interactions had significant (P (PP>0.05). The three light media were remarkably better than soil for the growth of B. alnoides seedlings. The flexibilities of five clones to these light media were also quite different, for example, the clone B5 adapted to all the media. As a whole, the medium with 25 percent of pine skin and 75 percent of carbonized sawdust was the best for cultivating micro-propagated seedlings of B. alnoides, and was recommended to be used in practice.

The cuttings from scion plucking orchard were used to test the combinations of cutting shoots with root-inducing regulators, media and cutting seasons in order to study the effects of different root-inducing regulators (ABT6 and IBA) and their concentrations, the lignifying degree of cutting shoots, the media types and propagation seasons on rooting ability, rooting number per shoot and rooting length of Betula alnoides. The result showed that tremendous significant differences were observed among different treatments, and the rooting percentage could be higher than 96.67% under the optimal cutting measure when conducted in the season of summer or autumn by using young shoots with apical bud as cutting shoots, treated with a higher concentration of ABT6 and IBA (800-1 000 mg·kg-1), and planting in the organic light medium which consisted of 80% carbonized pine bark.