Prediction of Whole-Stem α-Cellulose Yield, Lignin Content, and Wood Density in Juvenile and Mature Loblolly Pine
Authors: Aspinwall, Michael J.; Li, Bailian; McKeand, Steven E.; Isik, Fikret; Gumpertz, Marcia L.
Source: Southern Journal of Applied Forestry, Volume 34, Number 2, May 2010 , pp. 84-90(7)
Publisher: Society of American Foresters
Abstract:Models were developed for predicting whole-stem α-cellulose yield, lignin content, and wood density in 14- and 20-year-old loblolly pine across three different sites. Also, the relationships between juvenile-, transition-, and mature-wood α-cellulose yield, lignin content, and wood density at breast-height and overall whole-stem wood property values were examined. Whole-stem wood property weighted averages were calculated by taking 12-mm core samples at breast height and at 2.4-m incremental heights up each tree, and breast-height wood property values were then used to predict whole-stem weighted averages. Despite large differences in growth across sites and both ages, whole-stem models based on whole cores taken at breast height were not significantly different among sites, and coefficients of determination (R2) were 0.87, 0.74, and 0.78 for α-cellulose, lignin, and wood density, respectively. Generally, whole-stem prediction models based on sections of wood at breast height were not significantly different among sites and were less effective than cores as predictors, explaining between 39 and 82% of the variation in whole-stem wood traits. The results of this study indicate that the relationship between breast height and whole-stem wood chemical properties (and density) is predictable and consistent across sites in both juvenile and mature loblolly pine.
Document Type: Research Article
Publication date: May 1, 2010
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