RELATIONSHIP BETWEEN WOOD DENSITY, MICROFIBRIL ANGLE AND STIFFNESS IN THINNED AND FERTILIZED PINUS RADIATA
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The relationships between wood anatomy in standing trees and the strength of boards were examined in Pinus radiata D. Don (thinned vs thinned and fertilized) at 2 contrasting sites. Fertilizer treatments were applied after mid-rotation thinning. Logs were taper sawn and boards, near the pre-treatment / post-treatment boundary, subjected to acoustic and strength assessment. Average wood property data from a 12-mm increment core obtained prior to harvest, was extracted from the relevant portion of the radius.
In general, fertilizer resulted in lower density, higher microfibril angle (MFA) and slightly lower stiffness. However, stiffness was still relatively high as the affected wood was from the more mature portion of the radius. SilviScan density and MFA data were good predictors of stiffness. Acoustic measurements on boards were strongly correlated with board stiffness. Path analyses explained up to 45% of the variance in stiffness, as a function of estimated MOE and log sweep.
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RELATIONSHIP BETWEEN WOOD DENSITY, MICROFIBRIL ANGLE AND STIFFNESS IN THINNED AND FERTILIZED PINUS RADIATA
In: IAWA JournalSearch for other papers by Geoffrey M. Downes in
Current site
Google Scholar
PubMed
Search for other papers by J. Gwinyai Nyakuengama in
Current site
Google Scholar
PubMed
Search for other papers by Robert Evans in
Current site
Google Scholar
PubMed
Search for other papers by Richard Northway in
Current site
Google Scholar
PubMed
Search for other papers by Philip Blakemore in
Current site
Google Scholar
PubMed
Search for other papers by Ross L. Dickson in
Current site
Google Scholar
PubMed
Search for other papers by Marco Lausberg in
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PubMed
The relationships between wood anatomy in standing trees and the strength of boards were examined in Pinus radiata D. Don (thinned vs thinned and fertilized) at 2 contrasting sites. Fertilizer treatments were applied after mid-rotation thinning. Logs were taper sawn and boards, near the pre-treatment / post-treatment boundary, subjected to acoustic and strength assessment. Average wood property data from a 12-mm increment core obtained prior to harvest, was extracted from the relevant portion of the radius.
In general, fertilizer resulted in lower density, higher microfibril angle (MFA) and slightly lower stiffness. However, stiffness was still relatively high as the affected wood was from the more mature portion of the radius. SilviScan density and MFA data were good predictors of stiffness. Acoustic measurements on boards were strongly correlated with board stiffness. Path analyses explained up to 45% of the variance in stiffness, as a function of estimated MOE and log sweep.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 55 | 0 | 0 |
| Full Text Views | 699 | 157 | 17 |
| PDF Views & Downloads | 571 | 65 | 7 |
