scholarly journals Shrinkage processes in standard-size Norway spruce wood specimens with different vulnerability to cavitation

2009 ◽  
Vol 29 (11) ◽  
pp. 1419-1431 ◽  
Author(s):  
S. Rosner ◽  
B. Karlsson ◽  
J. Konnerth ◽  
C. Hansmann
Keyword(s):  
Norway Spruce ◽  
Standard Size ◽  
Spruce Wood ◽  
Vulnerability To Cavitation

scholarly journals Wood density as a proxy for vulnerability to cavitation: Size matters

2017 ◽  
Vol 4 ◽  
pp. e001 ◽  
Author(s):  
Sabine Rosner
Keyword(s):  
Norway Spruce ◽  
Wood Density ◽  
Quadratic Regression ◽  
Ecological Studies ◽  
Standard Size ◽  
Density Measurements ◽  
Moisture Contents ◽  
Vulnerability To Cavitation ◽  
Cambial Age ◽  
Dry Wood

In this study, vulnerability to cavitation, P50 (i.e. the water potential causing 50 % loss of hydraulic conductivity), of Norway spruce trunkwood at different cambial age was related to wood density. Wood density was calculated from mass in the oven dry state related either to volume at the oven-dry state (dry wood density) or to volume at full saturation (basic wood density). Dry wood density and basic wood density were strongly linearly related (r² = 0.99); there was however a shift from the 1:1 reference line with increasing dry wood density. Dry wood density as well as basic wood density had similar high predictive qualities for P50 (r² = 0.85). The quadratic regression lines took however a quite different course below -4 MPa because volume shrinkage increased with increasing dry wood density. For Norway spruce sapwood with high dry wood density, mixing up different wood density traits would thus result in a predicted overestimation or underestimation of vulnerability to cavitation. Gravimetrically wood density measurements at different moisture contents (starting at full saturation) are easily to achieve on standard size specimens and the conversion curves obtained will be of high value for future ecological studies on other species and across species.

New polyenoic fatty acids in Norway spruce wood

1980 ◽  
Vol 19 (1) ◽  
pp. 147-148 ◽  
Author(s):  
Rainer Ekman
Keyword(s):  
Fatty Acids ◽  
Norway Spruce ◽  
Spruce Wood

Comparison of colonization capacity by asexual spores of Heterobasidion species in Norway spruce wood

2012 ◽  
Vol 42 (4) ◽  
pp. 338-344 ◽  
Author(s):  
A. Gunulf ◽  
J. Rönnberg ◽  
M. Berglund
Keyword(s):  
Norway Spruce ◽  
Spruce Wood

Mechanical behaviour of chemically modified Norway spruce (Picea abies L. Karst.): Experimental mechanical studies on spruce wood after methacrylation and in situ polymerization of styrene

2019 ◽  
Vol 53 (2) ◽  
pp. 425-445 ◽  
Author(s):  
Samuel Oluyinka Olaniran ◽  
Benjamin Michen ◽  
Diego F. Mora Mendez ◽  
Falk K. Wittel ◽  
Erik Valentine Bachtiar ◽  
...  
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Mechanical Behaviour ◽  
In Situ Polymerization ◽  
Chemically Modified ◽  
Spruce Wood ◽  
Mechanical Studies

Bioincising of Norway spruce wood using wood inhabiting fungi

2012 ◽  
Vol 68 ◽  
pp. 51-55 ◽  
Author(s):  
N. Thaler ◽  
B. Lesar ◽  
M. Kariž ◽  
M. Humar
Keyword(s):  
Norway Spruce ◽  
Spruce Wood

Anatomy of bioincised Norway spruce wood

2010 ◽  
Vol 64 (5) ◽  
pp. 346-355 ◽  
Author(s):  
Christian Lehringer ◽  
Konrad Hillebrand ◽  
Klaus Richter ◽  
Martin Arnold ◽  
Francis W.M.R. Schwarze ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Spruce Wood

scholarly journals Performance of Bark Beetle Damaged Norway Spruce Wood Against Water and Fungal Decay

BioResources ◽  
2018 ◽  
Vol 13 (2) ◽  
Author(s):  
Davor Kržišnik ◽  
Boštjan Lesar ◽  
Nejc Thaler ◽  
Miha Humar
Keyword(s):  
Norway Spruce ◽  
Bark Beetle ◽  
Fungal Decay ◽  
Spruce Wood

Geranylgeranyl esters in Norway spruce wood

1980 ◽  
Vol 19 (2) ◽  
pp. 321-322 ◽  
Author(s):  
Rainer Ekman
Keyword(s):  
Norway Spruce ◽  
Spruce Wood

scholarly journals The alpha-cypermethrin coated net for protecting Norway spruce wood against bark beetles (Curculionidae, Scolytinae)

2015 ◽  
Vol 55 (2) ◽  
pp. 156-161 ◽  
Author(s):  
Iwona Skrzecz ◽  
Wojciech Grodzki ◽  
Mieczysław Kosibowicz ◽  
Dorota Tumialis
Keyword(s):  
Picea Abies ◽  
Norway Spruce ◽  
Bark Beetles ◽  
Early Spring ◽  
Ips Typographus ◽  
High Efficacy ◽  
Thanasimus Formicarius ◽  
Spruce Wood ◽  
Research Material ◽  
Negative Effect

Abstract The study estimated the efficacy of a net coated with alpha-cypermethrin used to protect Norway spruce [Picea abies (L.) H. Karst] wood against bark beetle infestations. The inside of the net was coated with 100 mg/m2 of alpha-cypermethrin. The studies carried out in 2010 and 2011 took place in southern Poland in the Beskid Żywiecki and Beskid Sądecki mountains in P. abies stands threatened by Ips typographus (Linnaeus, 1758). The research material consisted of wood logs taken off of 70–80-year-old P. abies trees. The logs were wrapped in the net in the early spring before spring swarming of bark beetles. The unwrapped logs were considered as the study controls. An evaluation of the treatments was performed after 2 months. The evaluation was based on the counting of bark beetles galleries found after removing the bark from the wrapped and unwrapped logs. There were no insect galleries on the wrapped logs. The net was a barrier, on which bark beetles died. About 10 dead I. typographus beetles were found on 0.01 m2 of the net surface. On the bark from the unwrapped-control logs there were 3,156 galleries/entrance holes of bark beetles, in total, of which 73% belonged to I. typographus, 13% to Pityogenes chalcographus (Linnaeus, 1761), and almost 10% to Xyloterus lineatus (Oliv.). These results indicated the high efficacy of the net coated with alpha-cypermethrin used for the protection of Norway spruce wood against the bark beetles. At the same time, the net was found to have a negative effect on non-target entomofauna, mainly Hylobius spp., Thanasimus formicarius (L.), and Tetropium castaneum (F.). However, the use of a net did not affect other predatory (Carabidae) and parasitic (Ichneumonidae and Tachinidae) entomofauna.

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