Studies on the occlusion of branch stubs after artificial pruning of mature stands (I)

概要

論文の詳細を見る
This report is on preliminary research conducted on pruning techniques in mature stands of Sugi, Japanese cedar (Cryptomeria japonica D. DON.). Knot analysis was conducted on five 72-year-old sample trees. Sample trees had been pruned twice with hatchets when they were 49 and 57 years old. The length of a branch stub after artificial green pruning is about proportional to the diameter of the branch stub. The radial distance for the occlusion increased as the length of branch stub and its diameter increased. It takes a long time for the annual rings to recover their uniform circular form. Discoloration of the wood was caused by the wound on the trunk brought about by the green pruning. It is presumed that the development of discoloration is influenced by the length of the wound on the trunk. Concerning these results, there were no differences between normal branches and epicormic branches. The radial distance for the occlusion of a stub formed by natural pruning was affected by the stub's length.
日本森林学会の論文