@article{oai:nagoya.repo.nii.ac.jp:00006848, author = {高山, 昇三 and TAKAYAMA, Shozo and 吉田, 正人 and YOSHIDA, Masato and 奥山, 剛 and OKUYAMA, Takashi}, journal = {名古屋大学森林科学研究}, month = {Dec}, note = {スギ若齢木において、ミクロフィブリル傾角(MFA)と繊維方向成長応力の大きさを調べ、針葉樹未成熟材におけるMFAの圧縮成長応力発生への寄与を考察した。4年生クローンスギを様々な角度で人為的に傾斜させて成育させ、当年成長が停止した後に繊維方向の表面成長応力解放ひずみとひずみ測定部分のMFAを測定した。未成熟材であるためMFAは成熟材に比べ概して大きかったが、圧縮の成長応力が大きい部位ほどMFAは大きいという成熟材の場合と同様な結果が得られた。しかし、正常材から弱い圧縮あて材への過程で、成熟材では著しいMFAの増加が見られるが、未成熟材でのそれは僅かであった。未成熟材においても成長応力の発生は成熟材の場合と同様な機構で行われており、MFAは成長応力の大きさを制御する重要因子の一つであると考えられる。, In young stem of sugi (Cryptomeria japonica D. Don) microfibrillar angle (MFA) and surface growth stress release strain in longitudinal direction were investigated, and the contribution of MFA to compressive growth stress generation was discussed. Inclined artificially at variable angle, four year-old sugi was grown, and after annual growth stopped, surface growth stress release strain and MFA were measured. Since they were juvenile wood, MFAs were large generally compared with mature wood. Like the case of mature wood, MFAs became large as compressive growth strain became large. Although the remarkable increase in MFA was seen in mature wood during the process from normal wood to the weak compression wood, the MFA increase in juvenile wood was slight. In juvenile wood, generation of growth stress is generated by the same mechanism as the case of mature wood. MFA in juvenile wood seems to be one of the important factors which control growth stress as well as MFA in mature wood., 農林水産研究情報センターで作成したPDFファイルを使用している。}, pages = {7--10}, title = {未成熟材における圧縮成長応力発生へのミクロフィブリル傾角の寄与}, volume = {20}, year = {2001} }