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Variation of conducting area in stems of European larch (Larix deciduas) growing in fresh mixed coniferous forest and fresh mixed forest sites

Author

Listed:
  • M. Nawrot

    (Department of Forest Utilization, Poznan University of Life Sciences, Poznan, Poland)

  • M. Jakubowski

    (Department of Forest Utilization, Poznan University of Life Sciences, Poznan, Poland)

  • W. Pazdrowski

    (Department of Forest Utilization, Poznan University of Life Sciences, Poznan, Poland)

  • K. Kaźmierczak

    (Department of Forest Management, Institute of Dendrometry and Forest Productivity Science, Poznan University of Life Sciences, Poznan, Poland)

  • M. Szymański

    (Department of Forest Utilization, Poznan University of Life Sciences, Poznan, Poland)

Abstract

The paper presents an attempt to determine conducting area (CA), relative conducting area (CA.k-1) and mean ring conducting area (CAar) on discs cut at breast height from stems of larch trees growing in fresh mixed coniferous forest and fresh mixed forest sites, representing four age classes and the main crop according to Kraft's classification. The value of CA increases with an improvement of the social class of tree position in the community, while no such dependences were found for the value of (CA.k-1). The parameter CAar, except for one case in age class IV in the fresh mixed coniferous forest site, increases with an improvement of the position a tree takes in the community and differentiates more markedly under the conditions of fresh mixed forest sites. Relative conducting area (CA.k-1) decreases markedly with an increase in the age of trees, which is confirmed by high values of the coefficient of determination. Moreover, the significance of differences between individual trees in the main crop according to Kraft and forest site types was tested in terms of the values of CAar. Calculated values may be used to describe the relationships between conducting area and the size of the assimilating organ more precisely than the total sapwood zone.

Suggested Citation

  • M. Nawrot & M. Jakubowski & W. Pazdrowski & K. Kaźmierczak & M. Szymański, 2010. "Variation of conducting area in stems of European larch (Larix deciduas) growing in fresh mixed coniferous forest and fresh mixed forest sites," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 56(1), pages 18-27.
    • Handle: RePEc:caa:jnljfs:v:56:y:2010:i:1:id:45-2009-jfs
    DOI: 10.17221/45/2009-JFS
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    References listed on IDEAS

    as
    1. M. Nawrot & W. Pazdrowski & M. Szymański, 2008. "Dynamics of heartwood formation and axial and radial distribution of sapwood and heartwood in stems of European larch (Larix decidua Mill.)," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 54(9), pages 409-417.
    2. T. Jelonek & W. Pazdrowski & M. Arasimowicz & A. Tomczak & R. Walkowiak & J. Szaban, 2008. "The applicability of the Pipe Model Theory in trees of Scots pine of Poland," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 54(11), pages 519-531.
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