Skip to Main Content
Modeling corewood-outerwood transition in loblolly pine using wood specific gravityAuthor(s): Christian R. Mora; H. Lee Allen; Richard F. Daniels; Alexander Clark
Source: Can. J. For. Res., Vol. 37: 999-1011
Publication Series: Scientific Journal (JRNL)
PDF: Download Publication (2.37 MB)
DescriptionA modified logistic function was used for modeling specific-gravity profiles obtained from X-ray densitometry analysis in 675 loblolly pine (Pinus taeda L.) trees in four regeneration trials. Trees were 21 or 22 years old at the time of the study. The function was used for demarcating corewood, transitional, and outerwood zones. Site and silvicultural effects were incorporated into the model. Heteroscedasticity and within-group correlation were accounted for by specifying the variance and serial-correlation structure, respectively. The estimated transition zone was located between rings 5 and 15, and the outerwood demarcation point varied from rings 12 to 15. No effects of treatments on the demarcation points were observed; however, site preparation and fertilization affected the lower asymptotes of the curves in all sites. A geographical trend for the demarcation point was observed, with the northern site requiring more time to reach a plateau in specific gravity compared with the southern sites. The diameter of the juvenile core was increased as a result of the treatments. However, the amount of corewood was not statistically affected, zanging from 55% in the north to 75% in the south, except at one site where fertilization decreased the percentage of corewood.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMora, Christian R.; Allen, H. Lee; Daniels, Richard F.; Clark, Alexander. 2007. Modeling corewood-outerwood transition in loblolly pine using wood specific gravity. Can. J. For. Res., Vol. 37: 999-1011
- Collection of wood quality data by X-ray densitometry: a case study with three southern pines
- Juvenile/mature wood transition in loblolly pine as defined by annual ring specific gravity, proportion of latewood, and microfibril angle
- Production dynamics of intensively managed loblolly pine stands in the southern United States: a synthesis of seven long-term experiments
XML: View XML