A Method to Estimate Fibre Length Distribution in Conifers Based on Wood Samples from Increment Cores
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T. Mörling
Summary
We propose a method to estimate fibre length distribution in conifers based on wood samples from increment cores processed by automatic optical fibre-analysers. Automatic fibre-analysers are unable to distinguish: a) fibres from other tissues, “fines”, and b) cut from uncut fibres. However, our proposed method can handle these problems if the type of distributions that fibre lengths and fines follow is known. In our study the length distributions of fines and fibres were assumed to follow truncated normal distributions, characterised by means and standard deviations of the two distributions. Parameter estimates were obtained by the maximum likelihood method. Wood samples from two 22-year-old Scots pine trees at breast height were used to evaluate the performance of the method. From stem discs at 1.5 m, adjacent samples of 5 mm increment cores and wood pieces were taken. The cores were trimmed 1 mm at each side and samples were, after maceration, analysed in a Kajaani FiberLab 3.0. The results showed that the method works well and gives a possibility to distinguish fine and fibre length distribution.
Copyright © 2003 by Walter de Gruyter GmbH & Co. KG
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Artikel in diesem Heft
- Editorial
- Post-Harvest Chemical Staining in Blackwood (Acacia melanoxylon R. Br.)
- Albino Strains of Ophiostoma Species for Biological Control of Sapstaining Fungi
- Presence of a Distinct S3 Layer in Mild Compression Wood Tracheids of Pinus radiata
- A Method to Estimate Fibre Length Distribution in Conifers Based on Wood Samples from Increment Cores
- Inhomogeneities in the Chemical Structure of Hardwood Lignins
- Molecular Modeling of Lignin β-O-4 Model Compounds. Comparative Study of the Computed and Experimental Conformational Properties for a Guaiacyl β-O-4 Dimer
- Kraft Green Liquor Pretreatment of Softwood Chips. Part III: Lignin Chemical Modifications
- The Role of Ferulic Acid Removal during Bleaching of Wheat Straw Mechanical Pulp with Peroxygen Reagents
- Surface Fractal Dimensionality and Hygroscopicity for Heated Wood
- Evaluation of the Microclimate in a Stored Softwood Chip Pile for Biopulping
- Wettability of Heat-Treated Wood
- The Relationship between Longitudinal Growth Strain, Tree Form and Tension Wood at the Stem Periphery of Ten- to Eleven-Year-Old Eucalyptus globulus Labill.
- Effects of Thermal Conductivity Data on Accuracy of Modeling Heat Transfer in Wood
- Detection of the Fracture Path under Tensile Loads through in situ Tests in an ESEM Chamber
- Properties of Southern Pine Wood Impregnated with Styrene
- Takayoshi Higuchi 75 Years Old
- Literature Reports
