黄檗幼树根韧皮部和茎干基部的韧皮部中主要药用成分含量很高，而叶片、木质部和周皮很低。
The alkaloid contents were highest in root and stem base phloem of Amur corktree saplings, and lower in leaves, xylem and periderm.
结果表明，保留木质基部的嫩枝插穗和摘去花苞的硬枝插穗其生根能力显著高于对照。
The results of experiment showed that the rooting capability of young ramulus cuttings with the xyloid basis and old cuttings with the flower buds removed was stronger than that of the control.
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