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Effects of density and microfibril orientation on the vertical variation of low-stiffness wood in radiata pine butt logs

  • Ping Xu , Lloyd Donaldson , John Walker , Robert Evans and Geoffrey Downes
Published/Copyright: June 1, 2005
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Holzforschung
From the journal Volume 58 Issue 6

Abstract

The roles of density and microfibril angle in causing low stiffness in radiata pine butt logs were studied in detail on a 17-year-old tree. Distributions of these variables were compared with stiffness variations in the vertical direction. Results supported the hypothesis that cell ultrastructure is responsible for the vertical variation in stiffness. The microfibril orientation in tangential wall is considered to be an important factor contributing to wood stiffness because of the smaller microfibril angles compared with radial microfibril angles, and also because of the larger decrease of the microfibril angles with the rapid increase of wood stiffness in vertical direction especially in corewood zone. The microfibrils in the S3 layer fall from over 80° to angles of 54° and 51° for radial and tangential cell walls at the top of the butt log. Further study is needed for fully understanding the characteristics of S3 layers.

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References

Barber, N.F., Meylan, B.A. (1964) The anisotropic shrinkage of wood – A theoretical model. Holzforschung18:146–156.10.1515/hfsg.1964.18.5.146Search in Google Scholar

Buchanan, A.H., Nakada, R., Walker, J.C.F. (1999) Log segergation by stiffness class. 3rd Wood quality symposium: Emerging technologies for wood processing, Rotorua, New Zealand and Melbourne, Australia, p. 9.Search in Google Scholar

Butterfield, B., Pal, V. (1998) Relating microfibril angle to wood quality in clonal seedlings of radiata pine. Proceedings International workshop on microfibril angle, Westport, New Zealand. pp. 337–347.Search in Google Scholar

Cave, I.D. (1997a) Theory of x-ray measurement of microfibril angle, Part 1: The condition for reflection, Wood Sci. Technol.31:143–152.10.1007/BF00705881Search in Google Scholar

Cave, I.D. (1997b) Theory of x-ray measurement of microfibril angle, Part 2: The diffraction Pattern. Wood Sci. Technol.31:225–234.10.1007/BF00702610Search in Google Scholar

Cave, I.D., Walker, J.C.F. (1994) Stiffness of wood in fast-grown plantation softwoods: the influence of microfibril angle. Forest Prod. J.44(5):43–48.Search in Google Scholar

Cown, D.J, McConchie, D.L. (1982) Rotation age and silvicultural effects on wood properties of four stands of Pinus radiata. New Zealand J. Forestry Sci.12(1):71–85.Search in Google Scholar

Cown, D.J., McConchie, D.L., Young, G.D. (1991) Radiata pine wood properties survey, FRI Bulletin No. 50 (Revised edition), Forest Research Institute, New Zealand.Search in Google Scholar

Cown, D.J. (1992) Corewood (juvenile wood) in Pinus radiata - should we be concerned? New Zealand J. Forestry Sci.22(1):87–95.Search in Google Scholar

Donaldson, L.A. (1992) Within- and between-tree variation in microfibril angle in Pinus radiata. New Zealand J. Forestry Sci.22:77–86.Search in Google Scholar

Donaldson, L.A., Lausberg, M.J.F. (1998) Comparison of conventional transmitted light and confocal microscopy for measuring wood cell dimensions by image analysis. IAWA J.19:321–336.10.1163/22941932-90001538Search in Google Scholar

Evans, R. (1999). A variance approach to the x-ray diffractometric estimation of microfibril angle in wood. Appita J.52(4):283–289.Search in Google Scholar

Evans, R. Ilic, J. (2001) Rapid prediction of wood stiffness from microfibril angle and density. Forest Prod. J.51(3):53–57.Search in Google Scholar

Evans, R., Booker, R.E., Kibblewhite, R.P. (2001) Variation of microfibril angle, density and stiffness in fifty radiata pine trees. Proceedings of the 55th Appita Annual General Conference, Hobart. pp. 9–14.Search in Google Scholar

Harris, J.M., Cown, D.J. (1991) Basic wood properties. In: Properties and Uses of New Zealand Radiata Pine. Eds. Kininmonth, J.A., Whitehouse, L.J. New Zealand Ministry of Forestry, Forest Research. p. 28.Search in Google Scholar

Meylan, B.A. (1967) Measurement of microfibril angle by X-ray diffraction. Forest Prod. J.17 (5):51–58.Search in Google Scholar

Meylan, B.A., Butterfield, B.G. (1978) Helical orientation of the microfibrils in tracheids, fibres and vessels. Wood Sci. Technol.12:219–222.10.1007/BF00372867Search in Google Scholar

McConchie, D. (1999) An update on within-ring internal checking including a procedure to identify logs prone to form checks during drying. Proceedings 3rd Wood quality symposium: Emerging technologies for evaluating wood quality for processing. Forest Industries Engineering Association/Forest Research, Rotorua, New Zealand. p. 19.Search in Google Scholar

Tsehaye, A., Buchanan, A.H., Walker, J.C.F. (1995). Stiffness and tenstile strength variation within and between radiata pine trees. Journal of the Institute of Wood Science13(5):513–518.Search in Google Scholar

Tsehaye, A., Buchanan, A.H., Meder, R., Newman, R.H., Walker, J.C.F. (1998). Microfibril angle: determining wood stiffness in radiata pine. Proceedings International workshop on microfibril angle, Westport, New Zealand. pp. 323–336.Search in Google Scholar

Walker, J.C.F., Butterfield, B.G. (1995) The importance of microfibril angle for the processing industries. New Zealand J. Forestry40(4):34–40.Search in Google Scholar

Walker, J.C.F., Woollons, R.C. (1998) Cell wall organisation and the properties of xylem – A speculative review. Proceedings International workshop on microfibril angle, Westport, New Zealand. pp. 13–26.Search in Google Scholar

Walker, J.C.F. (1998a) Corewood: docking the dog’s tail. Part 1, an alternative road map. New Zealand Forestry42(4):5–6.Search in Google Scholar

Walker, J.C.F. (1998b) Corewood: docking the dog’s tail. Part 2, the need to particularise. New Zealand Forestry42(5):4–6.Search in Google Scholar

Wimmer, R., Lucas, B.N., Tsui, T.Y., Oliver, W.C. (1997) Longitudinal hardness and Young’s modulus of spruce tracheid secondary walls using nanoindentation technique.Wood Sci. Technol.31:131–141.10.1007/BF00705928Search in Google Scholar

Xu, P., Walker, J.C.F. (2004) Stiffness gradients in radiata pine trees. Wood Sci. Technol.38(1):1–9.10.1007/s00226-003-0188-2Search in Google Scholar

Xu, P., Nakada, R., Walker, J.C.F. (1999) Optimising your processing: the right wood and the right technology. Proceedings 3rd Wood quality symposium: Emerging technologies for wood processing. Forest Industries Engineering Association/Forest Research, Rotorua, New Zealand and Melbourne, Australia. p. 12.Search in Google Scholar

Published Online: 2005-06-01
Published in Print: 2004-10-01

© Walter de Gruyter

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