Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Wood density and anatomical properties in suppressed-growth trees : comparison of two methods

Source: Wood and fiber science. Vol. 39, no. 3 (2007): pages 462-471.

Author(s)Vahey, David W.; Zhu, J. Y.; Scott, C. Tim

Publication Year: 2007  View PDF »

Related Publications: view

Category: Journal Articles

Abstract: Interest in the commercial value of small-diameter timber has led to testing core samples with SilviScan to characterize density and transverse fiber dimensions. Data showed that latewood density and tracheid diameter in suppressed-growth material can vary spatially on a scale comparable to the 50-_m resolution of the instrument used in our testing. An optical imaging method called Ring Profiler was developed to determine what effect SilviScan's resolution had on the measurements. A single suppressed-growth specimen of Douglas-fir was used to develop the method. Ring Profiler measurements of the specimen showed that SilviScan overestimated latewood tracheid radial diameters by 59% in growth rings averaging 200-_m width. In those same growth rings, SilviScan latewood density was found to be 19% too low. In all growth rings measured by Ring Profiler, latewood wall thicknesses were anisotropic. Radial and tangential values averaged 13% less than the isotropic wall thickness calculated from SilviScan data. Ring Profiler density measurement from binarized images of wood cross-sections was found to correlate well with SilviScan X-ray density (r-squared _ 0.907); however, better images and an objective method for thresholding are needed for accuracy over a large sample space. With these improvements and automated scanning of samples, Ring Profiler could be an attractive, inexpensive complement to SilviScan.

Keywords: SilviScan, tracheid, density, diameter, wall thickness, anisotropy, image analysis, resolution, suppressed growth, small diameter, thinnings, pulp, pulping, Douglas fir, wood anatomy, wood density, stand density, pulpwood, ring profiler, small timbers, utilization, smallwood, small-diameter timber, thinnings

File size: 274 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 3149
Current FPL Scientist associated with this product
Zhu, JunYong
Research General Engineer

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »

Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »

Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »

Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »