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| Autore principale: | |
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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Instituto de Ecología, A.C.
2016
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=61745707011 https://www.redalyc.org/journal/617/61745707011/ https://www.redalyc.org/journal/617/61745707011/html/ https://www.redalyc.org/journal/617/61745707011/61745707011.epub https://www.redalyc.org/journal/617/61745707011/movil |
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Sommario:
- Vertical variation of density, flexural strength and stiffness of Persian silk wood Majid Kiaei Mohammad Farsi Agrociencias stem height stem height radial direction radial direction modulus of rupture The aim of this research was to investigate the effects of longitudinal position (stem height) and heart-sapwood on density, modulus of elasticity ( MOE ) and modulus of rupture ( MOR ) in bending for Persian silk wood ( Albizzia julibrissin) . Five normal trees were selected from the Guilan region, Iran. Samples for testing were prepared at four stem height levels (5%, 25%, 50% and 75% of total stem height) in both positions along radial direction (heartwood and sapwood). Analysis of variance results (Anova) indicated that the effects of longitudinal position (stem height) and heartwood-sapwood on the wood density, MOE and MOR were significant. The mean of wood density, MOE and MOR along longitudinal position from base to top decreased with height. The mean of wood density, MOR and MOE in sapwood are lower compared to the corresponding values for heartwood. The relationship between wood density and mechanical strength properties were analyzed by regression models. A positive correlation was found between wood density with MOE and MOR in both heartwood and sapwood. 2016 artículo científico 1405-0471 https://www.redalyc.org/articulo.oa?id=61745707011 https://www.redalyc.org/journal/617/61745707011/ https://www.redalyc.org/journal/617/61745707011/html/ https://www.redalyc.org/journal/617/61745707011/61745707011.epub https://www.redalyc.org/journal/617/61745707011/movil en http://www.redalyc.org/revista.oa?id=617 Madera y Bosques application/pdf Instituto de Ecología, A.C. Madera y Bosques (México) Num.1 Vol.22