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Issue 7 (2) 2008 pp. 45-58

Marek Szymański, Witold Pazdrowski, Katarzyna Kaźmierczak, Krzysztof Mańka, Marcin Nawrot

AXIAL AND RADIAL VARIATION IN THE PROPORTIONS OF SAPWOOD AND HEARTWOOD IN STEMS OF COMMON OAK (QUERCUS ROBUR L.) DEPENDING ON SITE TYPE, AGE CLASS AND SOCIAL CLASS OF TREE POSITION

Keywords: common oak (Quercus robur L.), sapwood, heartwood, fresh mixed forest (LMśw), fresh broadleaved forest (Lśw), timber
Abstract: The study presents radial and axial variation in the proportions of sapwood and heartwood in stems of common oak growing under varied growth conditions. Collected material was analyzed in order to find factors affecting irregularity in sapwood and heartwood zones in stems of trees representing investigated populations. The proportion of sapwood and heartwood in the stem and the rate of heartwood formation are influenced by crown size and transpiration efficiency of trees, social class of tree position as well as site conditions. The proportions of sapwood and heartwood vary also between age classes of trees. A considerable effect on the width of the sapwood zone in trees was found for crown size. In this case correlations were positive in both analyzed age classes, although in age class III they were weaker than in age class IV.
pub/.pdf Full text available in english in Adobe Acrobat format:
http://www.forestry.actapol.net/pub/5_2_2008.pdf

For citation:

MLA Szymański, Marek, et al. "Axial and radial variation in the proportions of sapwood and heartwood in stems of common oak (Quercus robur L.) depending on site type, age class and social class of tree position." Acta Sci.Pol. Silv. 7.2 (2008): 45-58.
APA Szymański M., Pazdrowski W., Kaźmierczak K., Mańka K., Nawrot M. (2008). Axial and radial variation in the proportions of sapwood and heartwood in stems of common oak (Quercus robur L.) depending on site type, age class and social class of tree position. Acta Sci.Pol. Silv. 7 (2), 45-58
ISO 690 SZYMAńSKI, Marek, et al. Axial and radial variation in the proportions of sapwood and heartwood in stems of common oak (Quercus robur L.) depending on site type, age class and social class of tree position. Acta Sci.Pol. Silv., 2008, 7.2: 45-58.
Streszczenie w języku polskim:
http://www.forestry.actapol.net/tom7/zeszyt2/streszczenie-5.html