Mikko Havimo, Juha Rikala, Jari Sirviö, Marketta Sipi. (2008). Distributions of tracheid cross-sectional dimensions in different parts of Norway spruce stems. Silva Fennica vol. 42 no. 1 article id 266. https://doi.org/10.14214/sf.266

Keywords: Norway spruce; cell wall thickness; earlywood; latewood; tracheid dimension; tangential width; radial width

Abstract | View details | Full text in PDF | Author Info

Distributions of three cross-sectional dimensions: radial and tangential tracheid width, and cell wall thickness in different timber assortments of Norway spruce were investigated. Wood samples from a mature stand were measured with SilviScan. In the analysis, virtual trees were constructed from measurement data, and divided into three assortments: whole stem, top pulpwood and sawmill chips. Average values and distributions of the properties were calculated for all assortments, and distributions divided into earlywood and latewood across the whole tree assortment. There was considerable variation within latewood in all three cross-sectional dimensions, but variation in earlywood was slight in radial width and cell wall thickness. In earlywood, tangential tracheid width showed considerable internal variation, and the difference between earlywood and latewood in tangential width was small. Within-assortment variation of all three properties was larger than between assortments. We may conclude that only a moderate difference in pulp properties can be achieved by sorting raw material into sawmill chips and top pulpwood. Pulp fractionation into earlywood and latewood seems to be a more efficient method, since it gives classes with small within-class variation and distinct average properties. However, it should be kept in mind that the results are valid only in mature stands, where growth rate variation and juvenile wood content are small.

Havimo, University of Helsinki, Department of Forest Resource Management, P.O. Box 27, FI-00014 University of Helsinki, Finland E-mail: mikko.havimo@helsinki.fi
Rikala, University of Helsinki, Department of Forest Resource Management, P.O. Box 27, FI-00014 University of Helsinki, Finland E-mail: jr@nn.fi
Sirviö, KCL, P.O. Box 70, FI-02151 Espoo, Finland E-mail: js@nn.fi
Sipi, University of Helsinki, Department of Forest Resource Management, P.O. Box 27, FI-00014 University of Helsinki, Finland E-mail: ms@nn.fi

Click this link to register to Silva Fennica.

If you are a registered user, log in to save your selected articles for later access.

Contents alert

Your selected articles
Send to email

Järveläinen V.-P., (1980) Who is a farmer? Silva Fennica vol. 14 no. 4 article id 5094 (remove) | Edit comment

Partanen J., Häkkinen R. et al. (2026) Short-day treatment in late summer reduces the c.. Silva Fennica vol. 60 no. 2 article id 25053 (remove) | Edit comment

Jåstad E. O., Nagel N. O. et al. (2023) The location and capacity-dependent price impact.. Silva Fennica vol. 57 no. 1 article id 23001 (remove) | Edit comment

Järveläinen V.-P., Riihinen P. (1979) Forestry and rural development. Silva Fennica vol. 13 no. 3 article id 5036 (remove) | Edit comment

Hallongren H., Kankaanhuhta V. et al. (2016) Cleaning Scots pine seedling stands with mechani.. Silva Fennica vol. 50 no. 3 article id 1514 (remove) | Edit comment

de Miguel S., (2023) Artificial intelligence-driven disruption in sci.. Silva Fennica vol. 57 no. 1 article id 23011 (remove) | Edit comment

Saarnijoki S., (1942) Distribution of European white elm in flooded sh.. Silva Fennica vol. no. 58 article id 4578 (remove) | Edit comment

Selander J., Kalo P. (1979) Evaluation of resistance of Scots pine seedlings.. Silva Fennica vol. 13 no. 2 article id 5022 (remove) | Edit comment

Chianucci F., (2015) A note on estimating canopy cover from digital c.. Silva Fennica vol. 50 no. 1 article id 1518 (remove) | Edit comment

Kantola M., (1979) Social promotion of forest workers. Silva Fennica vol. 13 no. 3 article id 5040 (remove) | Edit comment

Kellomäki S., Hari P. et al. (1980) Eco-physiological studies on young Scots pine st.. Silva Fennica vol. 14 no. 3 article id 5079 (remove) | Edit comment

Kuusela K., (1979) Forest balance on the national level. Silva Fennica vol. 13 no. 3 article id 5044 (remove) | Edit comment

Kalliola R., Saarinen T. et al. (2021) Seasonal variations of foliar element distributi.. Silva Fennica vol. 55 no. 1 article id 10444 (remove) | Edit comment

Raulo J., (1978) Forestation chain for birch (Betula pendula Roth.. Silva Fennica vol. 12 no. 1 article id 4984 (remove) | Edit comment

Koski V., (1980) Minimum requirements for seed orchards of Scots .. Silva Fennica vol. 14 no. 2 article id 5076 (remove) | Edit comment

Follow @SilvaFennica