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Showing 1 to 20 of 35 for “"Picea abies"”.
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Das Baumwachstum von kronenspannungsfrei gewachsenen Fichten (Picea abies (L.) Karst.) unter besonderer Berücksichtigung der holztechnologischen Eigenschaften
Ziel der Arbeit ist die Abschätzung der Holzqualität von Fichten, die nach einem in Rheinland-Pfalz entwickeltem waldbaulichen Verfahren kronenspannungsfrei erzogen werden und die Produktion von Wertholz vorsieht. <br> <br>Im Einzelnen sieht das Konzept vor, nach einer natürlichen …
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Konkurrenzuntersuchungen und Wachstumsmodellierung in Waldumbaubeständen des Mittleren Erzgebirges
… zweischichtigen Waldumbaubeständen aus Fichte (Picea abies (L.) Karst.) und Buche (Fagus sylvatica L.) hin untersucht. Die dazu angelegten Versuchsflächen befinden sich im Sächsischen Forstamt Heinzebank und umfassen verschiedene Altersstadien des Voranbaus von Buche unter Fichte. Der zweite …
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Resin Flow Induction in Southern Pines: Implications for Defense Against Southern Pine Beetle
… management. Recent research with Norway spruce (Picea abies) has provided additional insight into the chemical pathways involved in host resistance, and has determined that trees exposed to mechanical wounding or fungal inoculation show acquired resistance to future pathogen attacks. This aspect …
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Kirjanpainaja Lahdessa : Kuinka tuho näkyy?
… ja lisääntyä onnistuneesti, jos metsäkuusi (Picea abies (L.) Karst) heikentyy iän tai tuhon seurauksena. Tässä tutkimuksessa kartoitetaan kirjanpainajan aiheuttamien kuusikkotuhojen laajuutta Etelä-Suomessa Lahden kaupungin taajamametsissä vuonna 2012. Tutkimuksen tarkoituksena on käyttää …
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Classification of large pollen datasets using neural networks with application to mapping and modelling pollen data
… change. Maps of the distribution limits of Picea abies in southern Scandinavia are compared with output from a bioclimatic model to explore distribution-climate relationships during the last 1500 years. Further a classification technique is used to map distributions of Danish forest types …
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Potential of temporal and spatial analysis techniques as tools for exploring changes in forest site productivity and following environmental interactions : Finnish-German comparative study
… Height and radial increments of Norway spruce (Picea abies L. Karst) and Scots pine (Pinus sylvestris L.) were used in to describe and model the sites with clear change of site quality, but also to find relationships between spatial patterns and space-time trajectories in forest growth …
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Water use of forests along elevation gradients in the Berchtesgaden National Park
… affecting the transpiration of Norway spruce (Picea abies) in the Berchtesgaden National Park along an elevation gradient were investigated. Sapflow and meteorological measurements were carried out during the summer of 2002. For each stand, structural differences (tree height, circumference, …
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Wooden cladding boards in cyclic moisture conditions : studies of cupping, moisture distribution and swelling stress
… stresses in the tangential direction in spruce (Picea abies) as a function of water soaking time in order to provide basic data. The cupping studies were conducted with full-scale test walls in laboratory conditions with specimens made of heat-treated and non-heat-treated timber. The moisture …
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Terpene analysis and transcript profiling of the conifer response to Heterobasidion annosum s.l. infection and Hylobius abietis feeding
… causes the majority of decay in Norway spruce (Picea abies), both causing severe economic losses. Another significant health problem of Scots pine is caused by Hylobius abietis, the large pine weevil, which damages newly established Scots pine stands. Several defence reactions in trees are …
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Moisture conditions in rain exposed wood joints - Experimental methods and laboratory measurements
… measurements were performed on Norway spruce (Picea abies (L.) Karst.) heartwood and sapwood. Both slow grown wood from northern Sweden and fast grown wood from southern Sweden were used in the experiments. The duration of high moisture contents was evaluated for all joints. In addition, the …
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Carbon and nitrogen cycling in watersheds of contrasting vegetation types in the Fernow Experimental Forest, West Virginia
… watersheds containing (i) planted Norway spruce (Picea abies) and (ii) native Appalachian hardwoods. I also investigated spatial and temporal patterns of dissolved C and N across both watersheds and identified key soil properties associated with NO3-N in soil solution and streamwater. In a third …
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Half-Lap Cross Laminated Timber Pegged Joints
… hardwood pegs in half-lap 3-ply Austrian spruce (Picea abies) and yellow-poplar (Liriodendron tulipifera) CLT diaphragm connections. In addition to the use of Austrian spruce and yellow-poplar CLT, both 1 inch and 1.25 inch diameter pegs were tested in the half-lap connections. The influence of …
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Struktur, Funktion und chemische Zusammensetzung superinisierter Transportbarrieren im Apoplasten höherer Pflanzen
… petraea (Matt.) Liebl.; Fagus sylvatica L.; Picea abies (L.) Karst.; Zea mays L.) mikroskopisch charakterisiert und chemisch analysiert. Nach enyzmatischer Isolation der Gewebe wurde die Biopolymerzusammensetzung von Suberin und Lignin der isolierten Zellwände nach Depolymerisierung durch …
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Effects of host stored resources on bark beetle-fungal-conifer interactions
… phloem NSC and sapwood lipids also declined in Picea abies trees inoculated with the fungus Ceratocystis polonica relative to trees attacked by the bark beetle Ips typographus (which vectors C. polonica) or control trees, again indicating that stored resources enhance fungal colonization.</p> …
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Effects of host stored resources on bark beetle-fungal-conifer interactions
… phloem NSC and sapwood lipids also declined in Picea abies trees inoculated with the fungus Ceratocystis polonica relative to trees attacked by the bark beetle Ips typographus (which vectors C. polonica) or control trees, again indicating that stored resources enhance fungal colonization.</p> …
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Untersuchungen zum Wasserhaushalt eines Fichtenwaldstandorts unter Berücksichtigung der Humusauflage
… der Humusauflage eines Fichtenbestands (Picea abies L.) im Fichtelgebirge (NO-Bayern) für eine Kontroll- und eine Manipulationsfläche, die über sechs Wochen experimentell ausgetrocknet und anschließend wiederbefeuchtet wurde, quantifiziert und modelliert werden. Für die korrekte Abbildung …
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Eiginleikar íslensks trjáviðar - þéttleiki og ending
… Alaskaösp (Populus trichocarpa), sitkagreni (Picea sitchensis), rauðgreni (Picea abies) og stafafura (Pinus contorta). Efniviður fyrir rannsóknina var sóttur í Haukadalsskóg í Biskupstungum og fór vettvangsvinna fram þar vorið 2012. Vöxtur allra tegunda í Haukadal var í meðallagi og svipaður …
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Wood extractives in hemicellulose stabilized emulsions
Norway spruce (Picea abies) and silver birch (Betula pendula) are widely spread in Europe. They are important raw materials for sawmill, pulp mill and paper industry. This industry utilizes merely 30-40% of the wood in the form of cellulose. Hemicelluloses, mainly galactoglucomannans (GGM) in …
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