METHOD OF PRODUCING ROOTED CUTTINGS OF TREE BELONGING TO THE FAMILY OF <I>PINACEAE</I>

摘要

It is intended to provide a method of producing rooted cuttings which is applicable to a tree belonging to the family of Pinaceae. More specifically, a method of producing rooted cuttings of a tree belonging to the family of Pinaceae which comprises the following steps A and B is provided. A. The step of externally adding a cytokinine to the shoot apex of short branches of a tree belonging to the family of Pinaceae and thus inducing the formation of new leaves and/or primary leaves. B. The step of trimming short branches in which new leaves and/or primary leaves have been formed in the above step A, pressing these trimmed branches, that are employed as cuttings, to a rooting bed having been moistened with a liquid medium containing nitrogen, phosphor and potassium as the essential elements but being free from a carbon source, and culturing in a culture container at a humidity of 80% or higher while controlling the carbon dioxide gas concentration in the culture container, thereby allowing the cuttings to root.