![Within-tree variation of heartwood and ring width in maritime pine (Pinus pinaster Ait.) [An article from: Forest Ecology and Management]](https://www.ebooknetworking.net/books/B00/0RR/bigB000RR2SWY.jpg)
Within-tree variation of heartwood and ring width in maritime pine (Pinus pinaster Ait.) [An article from: Forest Ecology and Management]
Book Details
Author(s)S. Knapic, H. Pereira
PublisherElsevier
ISBN / ASINB000RR2SWY
ISBN-13978B000RR2SW6
MarketplaceGermany 🇩🇪
Description
This digital document is a journal article from Forest Ecology and Management, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The development of heartwood and sapwood in maritime pine (Pinus pinaster Ait.) in relation with tree and cambial age and growth rate was studied in ten trees randomly sampled at harvest (54-85-year-old) in a commercial stand in central Portugal. Average ring width at stem base was 1.84+/-0.34mm for 50 years of age. Growth rate decreased with cambial age and for the same cambial age increased along the stem with tree height. The number of heartwood rings was strongly correlated with cambial age. Heartwood formation was estimated to start at approximately 21 years of age and to proceed at a constant annual rate that increased with age (0.5 and 0.7ringsyear^-^1 below and above 50 years of age). Within the tree, heartwood decreased with stem height, but in the lower part of the stem two patterns of variation were shown: a continuous decrease or an increase from stem base to a maximum at 2-3m and a decrease afterwards. Sapwood radial width remained approximately constant within the tree and correlated positively with tree growth.
Description:
The development of heartwood and sapwood in maritime pine (Pinus pinaster Ait.) in relation with tree and cambial age and growth rate was studied in ten trees randomly sampled at harvest (54-85-year-old) in a commercial stand in central Portugal. Average ring width at stem base was 1.84+/-0.34mm for 50 years of age. Growth rate decreased with cambial age and for the same cambial age increased along the stem with tree height. The number of heartwood rings was strongly correlated with cambial age. Heartwood formation was estimated to start at approximately 21 years of age and to proceed at a constant annual rate that increased with age (0.5 and 0.7ringsyear^-^1 below and above 50 years of age). Within the tree, heartwood decreased with stem height, but in the lower part of the stem two patterns of variation were shown: a continuous decrease or an increase from stem base to a maximum at 2-3m and a decrease afterwards. Sapwood radial width remained approximately constant within the tree and correlated positively with tree growth.
