Distribution of the timber quality attribute ‘knot surface’ in logs of Fagus sylvatica L. from pure and mixed forest stands

2021-04-26 | journal article. A publication with affiliation to the University of Göttingen.

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​Distribution of the timber quality attribute ‘knot surface’ in logs of Fagus sylvatica L. from pure and mixed forest stands​
Höwler, K.; Vor, T.; Schall, P.; Annighöfer, P.; Seidel, D. & Ammer, C.​ (2021) 
European Journal of Forest Research140(4) pp. 969​-981​.​ DOI: https://doi.org/10.1007/s10342-021-01378-9 

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Authors
Höwler, Kirsten; Vor, Torsten; Schall, Peter; Annighöfer, Peter; Seidel, Dominik; Ammer, Christian
Abstract
Abstract Research on mixed forests has mostly focused on tree growth and productivity, or resistance and resilience in changing climate conditions, but only rarely on the effects of tree species mixing on timber quality. In particular, it is still unclear whether the numerous positive effects of mixed forests on productivity and stability come at the expense of timber quality. In this study, we used photographs of sawn boards from 90 European beech (Fagus sylvatica L.) trees of mixed and pure forest stands to analyze internal timber quality through the quality indicator knot surface that was quantitatively assessed using the software Datinf® Measure. We observed a decrease in knot surface with increasing distance from the pith as well as smaller values in the lower log sections. Regarding the influence of neighborhood species identity, we found only minor effects meaning that timber qualities in mixed stands of beech and Norway spruce (Picea abies (L.) H. Karst.) tended to be slightly worse compared to pure beech stands.
Issue Date
26-April-2021
Journal
European Journal of Forest Research 
Organization
Fakultät für Forstwissenschaften und Waldökologie ; Burckhardt-Institut ; Abteilung Räumliche Strukturen und Digitalisierung von Wäldern ; Abteilung Waldbau und Waldökologie der gemäßigten Zonen 
ISSN
1612-4669
eISSN
1612-4677
Language
English
Sponsor
Niedersächsisches Ministerium für Wissenschaft und Kultur http://dx.doi.org/10.13039/501100010570
Georg-August-Universität Göttingen (1018)

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