The regeneration system of Tateyama sugi (Cryptomeria japonica) [in Japan]
1994
Taira, H. (Toyama-ken. Forestry and Forest Products Research Center, Kosugi (Japan))
The author investigated the regeneration system of Tateyama sugi (Cryptomeria japonica D. Don) growing in secondary broadleaf forests consisting mainly of Quercus mongolica Fisch. var. grossrrata Rehd. et Wilts. Under adequate light conditions, the sugi grew rapidly into large individual trees although they are repetitiously prostrated by snow. Under inadequate light conditions, the sugi stems laid on the ground as the recovery of stems after prostrating snow pressure was lost. It changed the form from seedlings to layering as roots emerged from the layering stems and grew along the ground. The sugi stems remained in the layering form as long as there were inadequate lighting conditions. During the layering growth process, twigs grew from layering stems. These twigs continued to grow and formed a colony. Some of the sugi stems grew up quickly in spaces created by the distraction of the upper layer crown, while other layering stems continued to grow along the ground. In adult sugi trues, shoots emerged from the trunks but stayed on the ground due to snow pressure. These shoots took root and resulted in more sugi trees
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