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Comparison of Norway spruce (Picea abies [L.] Karst.), Scots pine (Pinus sylvestris L.) and European larch (Larix decidua Mill.) stem shape by means of geometrical methods

Author

Listed:
  • M. Křepela

    (Faculty of Forestry and Environment, Czech University of Agriculture in Prague, Prague, Czech Republic)

  • R. Petráš

    (National Forest Centre - Forest Research Institute Zvolen, Zvolen, Slovak Republic)

Abstract

In this article the stem shape is compared in three coniferous tree species: Norway spruce, Scots pine and European larch. Stem is investigated by means of geometrical methods. Simplified Bookstein coordinates (stem shape diameters) and Procrustes coordinates were used for variability investigation. The material, originating from the Czech and Slovak territories, involved in total 3,346 spruce stems, 3,082 pine stems and 1,403 larch stems. The accordance of mean stem vectors was assessed by means of Hotelling's T2 two-sample test. For stem shape diameters and Procrustes tangent coordinates, the variability was examined using the method of principal components analysis. The three most important principal components were diagrammatized and described. The relationship between the stem shape and its size was also investigated, and inflection points of morphological stem curve were described for all three tree species.

Suggested Citation

  • M. Křepela & R. Petráš, 2006. "Comparison of Norway spruce (Picea abies [L.] Karst.), Scots pine (Pinus sylvestris L.) and European larch (Larix decidua Mill.) stem shape by means of geometrical methods," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 52(8), pages 337-347.
    • Handle: RePEc:caa:jnljfs:v:52:y:2006:i:8:id:4516-jfs
    DOI: 10.17221/4516-JFS
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    References listed on IDEAS

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    1. M. Křepela & D. Zahradník & J. Sequens, 2005. "Possible methods of Norway spruce (Picea abies[L.] Karst.) stem shape description," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 51(6), pages 244-255.
    2. M. Křepela & J. Sequens & D. Zahradník, 2004. "A contribution to the knowledge of Scots pine (Pinus sylvestris L.) stem shape," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 50(5), pages 211-218.
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    1. M. Křepela & D. Zahradník & J. Sequens, 2005. "Possible methods of Norway spruce (Picea abies[L.] Karst.) stem shape description," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 51(6), pages 244-255.

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