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Bayesian inference for multi-environment spatial individual-tree models with additive and full-sib family genetic effects for large forest genetic trials

Modeling the effect of initial planting density on within tree variation of stiffness in loblolly pine

Clustering forest harvest stands on spatial networks for optimised harvest scheduling

Annals of Forest Science : Volume 69, Issue 4, June 2012

Annals of Forest Science : Volume 69, Issue 3, April 2012

Annals of Forest Science : Volume 69, Issue 2, March 2012

Annals of Forest Science : Volume 69, Issue 1, January 2012

Annals of Forest Science : Volume 68

Annals of Forest Science : Volume 67

Annals of Forest Science : Volume 66

Annals of Forest Science : Volume 65

Annals of Forest Science : Volume 64

Modeling the effect of initial planting density on within tree variation of stiffness in loblolly pine

Content Provider	Springer Nature Link
Author	Antony, Finto Schimleck, Laurence R. Jordan, Lewis Daniels, Richard F. Clark, Alex
Copyright Year	2012
Abstract	Modulus of elasticity (MOE) is an important mechanical property determining the end-use and value of loblolly pine (Pinus taeda L.) lumber.In this study, a model was developed to predict the within tree variation of MOE, from pith-to-bark and stump-to-tip, using data collected from a 21-year-old unthinned stand where trees were planted under seven initial stand density levels (746–2,243 trees/hectare).The study was laid out in a randomized complete block design, with seven levels of initial planting density, replicated three times. Seven trees were destructively sampled from each plot, and bolts were cut from each tree at heights of 2.4, 7.3, and 12.2 m. Static bending samples (of dimension 2.5 × 2.5 × 40.6 cm) representing pith-to-bark variation were cut from each bolt and MOE measured. A three-parameter logistic function was used to model the pith-to-bark variation in stiffness with distance from pith as an explanatory variable.Based on the final fitted model, it was found that the asymptotic parameter (maximum outerwood MOE = 13.48 GPa) was not influenced by sampling height, initial planting density, and stem slenderness. However, the inflection and scale parameters were significantly influenced by these variables.In summary, we found that initial planting density had a significant influence on the amount of corewood produced with higher initial planting densities producing a lower proportion of corewood as indicated by a linear decrease in inflection point with an increase in planting density.
Starting Page	641
Ending Page	650
Page Count	10
File Format	PDF
ISSN	12864560
Journal	Annals of Forest Science
Volume Number	69
Issue Number	5
e-ISSN	1297966X
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-01-27
Publisher Institution	Institut National de la Recherche Agronomique (INRA)
Publisher Place	Paris
Access Restriction	Subscribed
Subject Keyword	Loblolly pine Corewood Outerwood Stiffness Pinus taeda L Environment Tree Biology Forestry Management Wood Science & Technology Forestry
Content Type	Text
Resource Type	Article
Subject	Ecology Forestry

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