Cover Image

Variation in mechanical properties of two rubberwood clones in relation to planting density

Variation in mechanical properties of two rubberwood clones in relation to planting density. Hevea brasiliensis as a fast-growing species with rotation age of about 25 years is usually managed under intensive silviculture techniques. Normally, it has a high amount of lower quality juvenile wood that...

Full description

Saved in:
Bibliographic Details
Main Authors: Naji, Hamid Reza, Bakar, Edi Suhaimi, Sahri, Mohd Hamami, Soltani, Mojtaba, Abdul Hamid, Hazandy, Ebadi, Seyed Eshagh
Format: Article
Language:English
Published: Forest Research Institute Malaysia 2014
Online Access:http://psasir.upm.edu.my/id/eprint/35970/1/Variation%20in%20mechanical%20properties%20of%20two%20rubberwood%20clones%20in%20relation%20to%20planting%20density.pdf
http://psasir.upm.edu.my/id/eprint/35970/
http://www.frim.gov.my/publication/journal-of-tropical-forest-science-jtfs/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.35970
record_format eprints
spelling my.upm.eprints.359702016-08-22T09:01:38Z http://psasir.upm.edu.my/id/eprint/35970/ Variation in mechanical properties of two rubberwood clones in relation to planting density Naji, Hamid Reza Bakar, Edi Suhaimi Sahri, Mohd Hamami Soltani, Mojtaba Abdul Hamid, Hazandy Ebadi, Seyed Eshagh Variation in mechanical properties of two rubberwood clones in relation to planting density. Hevea brasiliensis as a fast-growing species with rotation age of about 25 years is usually managed under intensive silviculture techniques. Normally, it has a high amount of lower quality juvenile wood that needs to be characterised for proper usage. Samples from four planting densities (500, 1000, 1500 and 2000 trees ha-1) of two new rubberwood clones [RRIM 2020 (A) and RRIM 2025 (B)] were subjected to selected mechanical tests. Significant differences in modulus of rupture (MOR) and modulus of elasticity (MOE) between planting densities were found except for MOE from clone B. The significant difference in clone B for compression parallel to grain was between the lowest planting density and the rest. In clone A, the significant difference for hardness was between densities of 1000 and 2000 trees ha-1 and in clone B between 500 and 1000 trees ha-1. Planting density was responsible for significant differences in shear parallel to grain between the lowest and highest planting densities in clone A and between 500 and 1500 trees ha-1 in clone B. Wood density moderately correlated with mechanical properties, so the regression equations were established directly with the planting densities. Properties including compression and hardness from clone A and MOE and compression from clone B were not successfully quantified in relation to planting density using a regression approach. Consequently, the mechanical properties in young trees were not highly affected by planting density. There were more visible differences between low and extreme planting densities than with moderate densities. Low planting density emerged as the optimum density. Forest Research Institute Malaysia 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/35970/1/Variation%20in%20mechanical%20properties%20of%20two%20rubberwood%20clones%20in%20relation%20to%20planting%20density.pdf Naji, Hamid Reza and Bakar, Edi Suhaimi and Sahri, Mohd Hamami and Soltani, Mojtaba and Abdul Hamid, Hazandy and Ebadi, Seyed Eshagh (2014) Variation in mechanical properties of two rubberwood clones in relation to planting density. Journal of Tropical Forest Science, 26 (4). pp. 503-512. ISSN 0128-1283 http://www.frim.gov.my/publication/journal-of-tropical-forest-science-jtfs/
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Variation in mechanical properties of two rubberwood clones in relation to planting density. Hevea brasiliensis as a fast-growing species with rotation age of about 25 years is usually managed under intensive silviculture techniques. Normally, it has a high amount of lower quality juvenile wood that needs to be characterised for proper usage. Samples from four planting densities (500, 1000, 1500 and 2000 trees ha-1) of two new rubberwood clones [RRIM 2020 (A) and RRIM 2025 (B)] were subjected to selected mechanical tests. Significant differences in modulus of rupture (MOR) and modulus of elasticity (MOE) between planting densities were found except for MOE from clone B. The significant difference in clone B for compression parallel to grain was between the lowest planting density and the rest. In clone A, the significant difference for hardness was between densities of 1000 and 2000 trees ha-1 and in clone B between 500 and 1000 trees ha-1. Planting density was responsible for significant differences in shear parallel to grain between the lowest and highest planting densities in clone A and between 500 and 1500 trees ha-1 in clone B. Wood density moderately correlated with mechanical properties, so the regression equations were established directly with the planting densities. Properties including compression and hardness from clone A and MOE and compression from clone B were not successfully quantified in relation to planting density using a regression approach. Consequently, the mechanical properties in young trees were not highly affected by planting density. There were more visible differences between low and extreme planting densities than with moderate densities. Low planting density emerged as the optimum density.
format Article
author Naji, Hamid Reza
Bakar, Edi Suhaimi
Sahri, Mohd Hamami
Soltani, Mojtaba
Abdul Hamid, Hazandy
Ebadi, Seyed Eshagh
spellingShingle Naji, Hamid Reza
Bakar, Edi Suhaimi
Sahri, Mohd Hamami
Soltani, Mojtaba
Abdul Hamid, Hazandy
Ebadi, Seyed Eshagh
Variation in mechanical properties of two rubberwood clones in relation to planting density
author_facet Naji, Hamid Reza
Bakar, Edi Suhaimi
Sahri, Mohd Hamami
Soltani, Mojtaba
Abdul Hamid, Hazandy
Ebadi, Seyed Eshagh
author_sort Naji, Hamid Reza
title Variation in mechanical properties of two rubberwood clones in relation to planting density
title_short Variation in mechanical properties of two rubberwood clones in relation to planting density
title_full Variation in mechanical properties of two rubberwood clones in relation to planting density
title_fullStr Variation in mechanical properties of two rubberwood clones in relation to planting density
title_full_unstemmed Variation in mechanical properties of two rubberwood clones in relation to planting density
title_sort variation in mechanical properties of two rubberwood clones in relation to planting density
publisher Forest Research Institute Malaysia
publishDate 2014
url http://psasir.upm.edu.my/id/eprint/35970/1/Variation%20in%20mechanical%20properties%20of%20two%20rubberwood%20clones%20in%20relation%20to%20planting%20density.pdf
http://psasir.upm.edu.my/id/eprint/35970/
http://www.frim.gov.my/publication/journal-of-tropical-forest-science-jtfs/
_version_ 1643831610798243840
score 13.211869

Similar Items