A study of teak wood quality from community forests in Gunungkidul II. Growth-stress measurement
Trees containing large growth stresses, leads to significant losses due to split, checked and also warped. The variation of growth-stress in teak trees grown in the three community forest sites of Gunungkidul regency was observed. The released strain levels were also discussed in relation to the gro...
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Universitas Gadjah Mada
2014-12-01
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| Series: | Jurnal Ilmu Kehutanan |
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| Online Access: | https://jurnal.ugm.ac.id/jikfkt/article/view/8547 |
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| author | Sri Nugroho Marsoem Vendy Eko Prasetyo Joko Sulistyo Ganis Lukmandaru |
| author_facet | Sri Nugroho Marsoem Vendy Eko Prasetyo Joko Sulistyo Ganis Lukmandaru |
| author_sort | Sri Nugroho Marsoem |
| collection | DOAJ |
| description | Trees containing large growth stresses, leads to significant losses due to split, checked and also warped. The variation of growth-stress in teak trees grown in the three community forest sites of Gunungkidul regency was observed. The released strain levels were also discussed in relation to the growth-rate and specific gravity. The strains released in the longitudinal and tangential directions were measured by the strain-gauge method. The values of longitudinal released strain at the periphery of the stem were ranged from -130.5 to -999.5 µå whereas tangential released strain were from -103 to 1411.5 µå. Some high values of longitudinal released strain indicated the presence of tension wood. Further, intra-tree variation of growth stress showed no particular tendencies among the samples. There were significant differences in the longitudinal strain as samples from Nglipar site showed the highest amounts (-628.25 + -223.73 µå). However, no significant correlation was found between the values of released strains with the growth-rate and specific gravity. The radial distributions of internal residual-stress were varied among the individuals which some trees exhibited steeper released strain gradients. Thus, it is important to reduce the gradient from pith to periphery of released-strain patterns to prevent the defect related to the growth stresses. |
| format | Article |
| id | doaj-art-005de6c683bd40d8a3f733bce6ef38c0 |
| institution | Kabale University |
| issn | 0126-4451 2477-3751 |
| language | English |
| publishDate | 2014-12-01 |
| publisher | Universitas Gadjah Mada |
| record_format | Article |
| series | Jurnal Ilmu Kehutanan |
| spelling | doaj-art-005de6c683bd40d8a3f733bce6ef38c02025-01-15T03:52:56ZengUniversitas Gadjah MadaJurnal Ilmu Kehutanan0126-44512477-37512014-12-018131310.22146/jik.85477087A study of teak wood quality from community forests in Gunungkidul II. Growth-stress measurementSri Nugroho Marsoem0Vendy Eko Prasetyo1Joko Sulistyo2Ganis Lukmandaru3Department of Forest Products Technology, Faculty of Forestry, Universitas Gadjah Mada, IndonesiaDepartment of Forest Products Technology, Faculty of Forestry, Universitas Gadjah Mada, IndonesiaDepartment of Forest Products Technology, Faculty of Forestry, Universitas Gadjah Mada, IndonesiaDepartment of Forest Products Technology, Faculty of Forestry, Universitas Gadjah Mada, IndonesiaTrees containing large growth stresses, leads to significant losses due to split, checked and also warped. The variation of growth-stress in teak trees grown in the three community forest sites of Gunungkidul regency was observed. The released strain levels were also discussed in relation to the growth-rate and specific gravity. The strains released in the longitudinal and tangential directions were measured by the strain-gauge method. The values of longitudinal released strain at the periphery of the stem were ranged from -130.5 to -999.5 µå whereas tangential released strain were from -103 to 1411.5 µå. Some high values of longitudinal released strain indicated the presence of tension wood. Further, intra-tree variation of growth stress showed no particular tendencies among the samples. There were significant differences in the longitudinal strain as samples from Nglipar site showed the highest amounts (-628.25 + -223.73 µå). However, no significant correlation was found between the values of released strains with the growth-rate and specific gravity. The radial distributions of internal residual-stress were varied among the individuals which some trees exhibited steeper released strain gradients. Thus, it is important to reduce the gradient from pith to periphery of released-strain patterns to prevent the defect related to the growth stresses.https://jurnal.ugm.ac.id/jikfkt/article/view/8547tectona grandis, growth-stressreleased straingunungkidulwood properties |
| spellingShingle | Sri Nugroho Marsoem Vendy Eko Prasetyo Joko Sulistyo Ganis Lukmandaru A study of teak wood quality from community forests in Gunungkidul II. Growth-stress measurement Jurnal Ilmu Kehutanan tectona grandis , growth-stressreleased strain gunungkidul wood properties |
| title | A study of teak wood quality from community forests in Gunungkidul II. Growth-stress measurement |
| title_full | A study of teak wood quality from community forests in Gunungkidul II. Growth-stress measurement |
| title_fullStr | A study of teak wood quality from community forests in Gunungkidul II. Growth-stress measurement |
| title_full_unstemmed | A study of teak wood quality from community forests in Gunungkidul II. Growth-stress measurement |
| title_short | A study of teak wood quality from community forests in Gunungkidul II. Growth-stress measurement |
| title_sort | study of teak wood quality from community forests in gunungkidul ii growth stress measurement |
| topic | tectona grandis , growth-stressreleased strain gunungkidul wood properties |
| url | https://jurnal.ugm.ac.id/jikfkt/article/view/8547 |
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