Wood density in Norway spruce: changes with thinning intensity and tree age
The effect of thinning intensity on growth and wood density in Norway spruce (Picea abies (L.) Karst.) was investigated in two long-term thinning experiments in southeastern Finland. The stands were approaching maturity, and their development had already been studied for 30 years. The intensities of...
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Online Access: | http://dx.doi.org/10.1139/x05-118 http://www.nrcresearchpress.com/doi/pdf/10.1139/x05-118 |
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crcansciencepubl:10.1139/x05-118 2024-09-15T18:05:57+00:00 Wood density in Norway spruce: changes with thinning intensity and tree age Jaakkola, Tuula Mäkinen, Harri Saranpää, Pekka 2005 http://dx.doi.org/10.1139/x05-118 http://www.nrcresearchpress.com/doi/pdf/10.1139/x05-118 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 35, issue 7, page 1767-1778 ISSN 0045-5067 1208-6037 journal-article 2005 crcansciencepubl https://doi.org/10.1139/x05-118 2024-08-01T04:10:03Z The effect of thinning intensity on growth and wood density in Norway spruce (Picea abies (L.) Karst.) was investigated in two long-term thinning experiments in southeastern Finland. The stands were approaching maturity, and their development had already been studied for 30 years. The intensities of thinning were low, normal, and high (i.e., the stand basal area after the thinning was, on average, 40, 27, and 24 m 2 ·ha 1 , respectively, in Heinola, and 30, 28, and 17 m 2 ·ha 1 in Punkaharju, respectively). Compared with the low thinning intensity, the normal and high thinning intensities increased the basal-area increment of individual trees by 52% and 68%, respectively. Normal and high thinning intensities resulted in a relatively small reduction (1%4%) of mean ring density compared with low thinning intensity. The random variation in wood density between and within trees was large. About 27% of the total variation in wood density was related to variation between rings. Our results indicate that the prevailing thinning intensities in Norway spruce stands in Fennoscandia cause no marked changes in wood density. At least, the possible reduction in wood density is low compared with the increase in individual tree growth. Article in Journal/Newspaper Fennoscandia Canadian Science Publishing Canadian Journal of Forest Research 35 7 1767 1778 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
The effect of thinning intensity on growth and wood density in Norway spruce (Picea abies (L.) Karst.) was investigated in two long-term thinning experiments in southeastern Finland. The stands were approaching maturity, and their development had already been studied for 30 years. The intensities of thinning were low, normal, and high (i.e., the stand basal area after the thinning was, on average, 40, 27, and 24 m 2 ·ha 1 , respectively, in Heinola, and 30, 28, and 17 m 2 ·ha 1 in Punkaharju, respectively). Compared with the low thinning intensity, the normal and high thinning intensities increased the basal-area increment of individual trees by 52% and 68%, respectively. Normal and high thinning intensities resulted in a relatively small reduction (1%4%) of mean ring density compared with low thinning intensity. The random variation in wood density between and within trees was large. About 27% of the total variation in wood density was related to variation between rings. Our results indicate that the prevailing thinning intensities in Norway spruce stands in Fennoscandia cause no marked changes in wood density. At least, the possible reduction in wood density is low compared with the increase in individual tree growth. |
format |
Article in Journal/Newspaper |
author |
Jaakkola, Tuula Mäkinen, Harri Saranpää, Pekka |
spellingShingle |
Jaakkola, Tuula Mäkinen, Harri Saranpää, Pekka Wood density in Norway spruce: changes with thinning intensity and tree age |
author_facet |
Jaakkola, Tuula Mäkinen, Harri Saranpää, Pekka |
author_sort |
Jaakkola, Tuula |
title |
Wood density in Norway spruce: changes with thinning intensity and tree age |
title_short |
Wood density in Norway spruce: changes with thinning intensity and tree age |
title_full |
Wood density in Norway spruce: changes with thinning intensity and tree age |
title_fullStr |
Wood density in Norway spruce: changes with thinning intensity and tree age |
title_full_unstemmed |
Wood density in Norway spruce: changes with thinning intensity and tree age |
title_sort |
wood density in norway spruce: changes with thinning intensity and tree age |
publisher |
Canadian Science Publishing |
publishDate |
2005 |
url |
http://dx.doi.org/10.1139/x05-118 http://www.nrcresearchpress.com/doi/pdf/10.1139/x05-118 |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
Canadian Journal of Forest Research volume 35, issue 7, page 1767-1778 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/x05-118 |
container_title |
Canadian Journal of Forest Research |
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35 |
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7 |
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1767 |
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1778 |
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1810443454139858944 |