Strength reduction in slash pine (Pinus elliotii) wood caused by decay fungiAuthor(s): Zhong Yang; Zhehui Jiang; Chung Y. Hse; Todd F. Shupe
Source: In: Hse, Chung-Yun; Jiang, Zehui; Kuo, Mon-Lin, eds. Advanced biomass science and technology for bio-based products: Proceedings of the meeting: 2007 May 23-25; Beijing, China. People’s Republic of China: Chinese Academy of Forestry: 383-390.
Publication Series: Miscellaneous Publication
Station: Southern Research Station
PDF: Download Publication (1.38 MB)
Small wood specimens selected from slash pine (Pinus elliotii )trees at three growth rates (fast, medium, and slow) were inoculated with brown-rot and white-rot fungi and then evaluated for work to maximum load (WML), modulus of rupture (MOR), and modulus of elasticity (MOE). The experimental variables studied included a brown-rot fungus (Gloeophyllum trabeum) and a white-rot fungus (Trametes versicolor) and six exposure periods (2, 4, 6, 8, 10, and 12 weeks) in which weight loss measurements were recorded. All samples were tested for nondestructive MOE (MOEsw) prior to static bending and the results were compared via regression analyses. There were significant differences in weight loss, WML, MOR, and MOE reductions due to tree growth rate and decay periods. The weight loss, WML, MOR, and MOE losses of all three growth rate classes treated with brown-rot fungi were greater than those exposed to white-rot fungi with the exception of very early decay (i.e., 2 weeks after inoculation). The mechanical property reduction was greater for fast grown wood than that of slow grown wood. As expected, strength decreased as exposure time to the fungi increased. The specimens exposed to brown-rot decay showed most of the strength reduction in the initial 6 weeks and after 10 weeks. The samples inoculated with the white-rot fungi showed a continual slight strength reduction for the entire 12 weeks. The results showed that the ratio of the loss in mechanical properties compared to weight loss were 7.2: 1 for WML, 6.4: 1 for MOR, and 3.8: 1 for MOE, for slash pine sapwood exposed to G. trabeum, and that of wood specimens exposed to T. versicolor were 3.0: 1 for WML, 2.2: 1 for MOR, and 4.1: 1 for MOE. Regression analysis indicated good correlations between MOEsw and static bending MOE after the 12 week exposure period.
- 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.
CitationYang, Zhong; Jiang, Zhehui; Hse, Chung Y.; Shupe, Todd F. 2009. Strength reduction in slash pine (Pinus elliotii) wood caused by decay fungi. In: Hse, Chung-Yun; Jiang, Zehui; Kuo, Mon-Lin, eds. Advanced biomass science and technology for bio-based products: Proceedings of the meeting: 2007 May 23-25; Beijing, China. People’s Republic of China: Chinese Academy of Forestry: 383-390.
- Inhibition of decay fungi using cotton cellulose hydrolysis as a model for wood decay
- Assessing the impact of wood decay fungi on the modulus of elasticity of slash pine (Pinus elliottii) by stress wave non-destructive testing
- Effect of wet-dry cycling on the decay properties of aspen fiber high-density polypropylene composites.
XML: View XML