干支の選日の一つである「八専」期間における伐採が木材・竹材の耐久性に与える影響―３年間の非接地暴露試験による腐朽・カビの発生度―

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タイトル別名
  • Effect of felling time related to a lunar calendar on the durability of wood and bamboo-Fungal and mould degradation during an above ground exposure test for 3 years-
  • エト ノ センジツ ノ ヒトツ デ アル ハッセン キカン ニ オケル バッサイ ガ モクザイ タケザイ ノ タイキュウセイ ニ アタエル エイキョウ 3ネンカン ノ ヒセッチ バクロ シケン ニ ヨル フキュウ カビ ノ ハッセイド
  • 3年間の非接地暴露試験による腐朽・カビの発生度

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The aim of this study was to elucidate the effect of felling time based on a lunar calendar on the natural durability of trees and bamboos. Six sets of sugi trees (Cryptomeria japonica) and moso bamboos (Phyllostachys heterocycla) were felled in a day during "Hassen" period appeared 6 times in 2003, and the other 6 sets of them were also felled in a nearby non-"Hassen" day. There is a belief that "Hassen" should be avoided to perform destructive works such as cutting trees. After felling sample trees and bamboos, these specimens were subjected to the outdoor exposure at above ground level for 3 years. Properties of specimens such as mould and fungal resistance were examined periodically. There was no clear difference in the degree of mould growth on the surfaces between specimens felled in a "Hassen" day and those felled in a "non-Hassen" day in the same month. The felling seasons, however, influenced the growth of mould clearly, which has been known in literature. Differences of fungal degradation evaluated by visual observation and the depth of pin penetration using Pilodyn were not also observed clearly between test specimens felled during "Hassen" and "non-Hassen" periods. Specimens of sugi felled in winter time, December and February were more susceptible to fungi than those felled in the other seasons.

収録刊行物

  • 木材保存

    木材保存 33 (4), 166-173, 2007

    公益社団法人 日本木材保存協会

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