Temat: drewno świerkowe - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Badanie spadku wytrzymałości drewna świerkowego modyfikowanego termicznie w warunkach temperatur pożarowych
The investigation of immediate strength loss of thermally modified spruce timber under fire temperatures
Autorzy:: Oszust, M.
Pieniak, D.
Ogrodnik, P.
Dec, L.
Powiązania:: https://bibliotekanauki.pl/articles/52682.pdf
Data publikacji:: 2011
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: drewno
modyfikacja drewna
modyfikacja termiczna
drewno swierkowe
drewno zmodyfikowane
wytrzymalosc
temperatury pozarowe
Opis:: Modyfikowanie termiczne drewna jest jedną z nowych technologii mających na celu poprawę jego właściwości. Drewno modyfikowane termicznie (TT) charakteryzuje się innymi parametrami użytkowo-estetycznymi niż drewno naturalne niemodyfikowane (NTT). Celem badań była ocena wpływu temperatur występujących w środowisku pożaru na zmiany wytrzymałości drewna świerkowego modyfikowanego termicznie. Badania zostały wykonane na specjalnie zaprojektowanym stanowisku badawczym z możliwością oddziaływania wysokich temperatur. Określono wartości wytrzymałości przy rozciąganiu, ściskaniu oraz zginaniu w temperaturach normalnych i pożarowych. Zaprezentowano analizę porównawczą spadku wytrzymałości drewna świerkowego TT i drewna świerkowego NTT. Wykazano istotny wpływ temperatur pożarowych na spadek wytrzymałości badanego drewna, postępujący w kolejnych przedziałach temperatur.
Thermal modification of timber is one of the new technologies aiming at the improvement of timber properties. Thermally modified timber (TT) has different aesthetic and utility parameters compared to non-modified timber (NTT). The objective of this study was the assessment of the influence of temperatures present in fire conditions on the immediate changes in strength of thermally modified spruce timber. Tests were made at a dedicated test stand equipped with a possibility of producing impact with high temperatures. The values of tensile strength, compression strength and bending strength in normal and fire temperatures conditions were determined. This paper presents a comparative analysis of the strength loss of TT spruce timber and NTT spruce timber. The study confirmed a significant influence of fire temperatures on the strength loss of tested timber in chosen ranges of increasing temperatures.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2011, 54, 185
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Dekompozycja obumarłych drzew w ekosystemach leśnych ze szczególnym uwzględnieniem świerka, buka i jodły
Decomposition of coarse woody debris in forest ecosystems with particular reference to spruce, beech and fir
Autorzy:: Bujoczek, L.
Powiązania:: https://bibliotekanauki.pl/articles/994583.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
ekologia lasu
ekosystemy lesne
drzewa obumarle
jodla
Abies
buk
Fagus
swierk
Picea
drewno jodlowe
drewno bukowe
drewno swierkowe
dekompozycja
decomposition
fragmentation
decay
coarse woody debris
fir
spruce
beech
Opis:: Dead trees are an important component of forest ecosystems, being a major reservoir of organic carbon, as well as a habitat for many species belonging to different systematic groups. The paper presents a review of the literature on wood decomposition and the factors that play an important role in this process, including its biological and physicochemical aspects. It provides recent knowledge on the rate of decomposition for the main forest tree species of Carpathian Mountains such as Norway spruce, European beech and European silver fir.
Źródło:: Sylwan; 2012, 156, 03; 208-217
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Jakość surowca świerkowego pochodzącego z drzewostanów naturalnych (rezerwatowych) i drzewostanów pełniących funkcje gospodarcze
The quality of spruce timber from natural stands (forest reserves) and managed stands
Autorzy:: Michalec, K.
Barszcz, A.
Wasik, R.
Powiązania:: https://bibliotekanauki.pl/articles/52586.pdf
Data publikacji:: 2013
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: drzewostany swierkowe
drzewostany naturalne
drzewostany gospodarcze
surowce drzewne
drzewa lesne
swierk
drewno swierkowe
jakosc
struktura jakosciowa
wady drewna
Opis:: W artykule przedstawiono wyniki analizy porównawczej jakości surowca świerkowego pochodzącego z drzewostanów naturalnych (rezerwatowych) i drzewostanów pełniących funkcje gospodarcze. W analizach uwzględniono również wady drewna wpływające na wyniki klasyfikacji badanego surowca oraz częstotliwość ich występowania. Wytypowane do badań drzewostany zlokalizowane były w terenach górskich: w Sudetach i Karpatach. W wyniku przeprowadzonych analiz stwierdzono, że nieznacznie lepsze pod względem jakości surowca drzewnego są w porównaniu z drzewostanami naturalnymi (rezerwatowymi) drzewostany pełniące funkcje gospodarcze.
The aim of this study is to determine the variation in the quality structure of spruce timber and to analyze the frequency of occurrence of trees with defects, including the generic structure of defects in natural stands (forest reserves) and stands serving economic functions. The study was conducted on 20 experimental plots located within the Sudeten and Carpathian Mountains, of which 10 were located in the area of nature reserves or national parks while the other 10 - in the managed stands (table 1). Each experimental plot constituted 5 or 10% of the area of the whole stand, depending on its differentiation. The following tasks were performed on the experimental plots: measurement of the breast-height diameter of each tree with a thickness of at least 7 cm, measurement of the height of each tree, quality assessment of the first section of the tree stem from the base along with its quality-dimensional class or group [Zasady... 2003], recording the types and varieties of wood defects. Analyzing the research material obtained, the stem of each tree growing on an experimental plot underwent simulated division into sections corresponding to the quality-dimensional classes and groups which could theoretically be distinguished over the whole length of a stem up to its top. The starting point was the quality-dimensional class noted in the butt section of the stem (section 1) during the field research. The above tasks included the use of the Radwański tables [Roczniki... 1956], which allowed the determination of the size and volume of each section of the spruce stems on the basis of the breast-height diameter and the tree height; wood defects, noted in field, were also taken into account. The material obtained was divided into 2 groups: data from the reserves and from the managed stands. For the material grouped in this way, juxtapositions were made of the average volumes of individual stem sections in quality-dimensional classes and groups of timber and the percentages of particular timber classes and groups in the two stand types were calculated. The material was also analyzed taking into account the generic structure of defects (percentages of individual trees with particular wood defects in a given group of stands). The next stage consisted in statistical analyses using the U-Mann-Whitney test, examining the significance of differences in the quality-dimensional structure of timber and the share of trees with defects between the two groups of stands. The research showed that trees growing in natural stands (reserves) are characterized by a greater average height, thickness (d1.3 and d1/2) and volume of individual trees as compared with the same characteristics of spruce trees in managed stands (table 2). Also, the average volume of the large-sized timber sections (WA, WB1, WB, WC, WD) of individual trees from natural forests dominated the volume of tree sections in managed stands. Despite that fact, the volume/ha of natural forest stands was lower (355.91 m3/ha) than of managed stands (380.27 m3/ha). By analyzing the quality-dimensional structure of the examined timber it was found that the proportion of higher quality timber classes (WA and WB) prevails in the managed stands, resulting in a lower share of the WC class of timber (fig. 1). Only the share of WB1 class timber prevails in natural stands. The managed stands also showed a larger share of medium-sized timber (groups S1, S2 and S4) as compared to natural forests. TheU-Mann-Whitney statistical test, however, did not show statistically significant differences in the timber quality structure between the natural and the managed stands (U = 49.00, Z = -0.0378, p = 0.9698). Subsequently, it was found that the proportion of trees with quality reduced by defects was higher in the natural stands (70.38%) as compared to the managed stands (67.13%). The main defect, decisive for timber quality, were knots (in both groups of stands). The share of trees with that defect was greater in the stands of natural origin (fig. 2). In those stands, there was also a larger share of trees with rot (external and internal rot) and unilateral curvatures. The managed stands demonstrated a share of injuries (overgrown and open ones) as well as bilateral and multilateral curvatures that was higher than in the natural stands. In conclusion, it should be emphasized that in the managed stands within the research area a higher quality of spruce timber as well as higher volume/ha were noted as compared to the natural stands (forest reserves). Stands in forest reserves are generally located at higher altitudes in the mountains or hardly accessible areas; their main purpose are protective functions, they also serve the purposes of research. In the stands situated in forest reserves there was reported, in comparison with the managed stands, a higher incidence of trees with a large number of knots and highly affected by rot. A frequent presence of such defects is inevitable there because this group does not undergo any management cuts that would improve timber quality. Moreover, the presence of rot is due to the advanced age of these stands. At the same time, what is disturbing is a large share of trees with injuriesin the managed stands. Given that spruce is very sensitive to mechanical damage of the stem, resulting in rapid development of rot, caution is recommended during forest management work and harvesting in spruce stands.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2013, 56, 189
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Jakość techniczna drewna 35-letnich świerków (Picea abies L. H. Karst) rosnących na powierzchni proweniencyjnej w LZD Rogów
Technical quality of wood of 35 years old Norway spruce (Picea abies L. H. Karst) growing on experimental plot in the Rogow Forest Experimental Station
Autorzy:: Bieniasz, A.
Lachowicz, H.
Buraczyk, W.
Moskalik, T.
Powiązania:: https://bibliotekanauki.pl/articles/986710.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewnictwo
swierk pospolity
Picea abies
proweniencje
drewno swierkowe
jakosc techniczna
wlasciwosci mechaniczne
wlasciwosci fizyczne
struktura drewna
wood properties
structural
mechanical and physical parameters
conifer timber
Opis:: The aim of this paper is to investigate and compare structural, mechanical and physical properties of wood of Norway spruce growing on experimental plot in Rogów (central Poland). The planting material consisted of seeds sourced from six selected provenances. Three of them originated from lowlands, while the others have mountain origins (tab. 1). The plot was established in 1975 and the wood was harvested in 2010. Wood samples were prepared and measured according to the Polish Standards describing those procedures. The following properties were subjected to the research and statistical analyses: average tree−ring width, share of latewood, wood density, compression strength parallel to grain, static bending, modulus of elasticity in static bending and the coeffi− cients of compression strength parallel to grain, static bending, and modulus of elasticity in static bending. Results of the investigation were correlated in the frame of each provenance. Wood density determines values of compression strength parallel to grain, static bending and modulus of elasticity in static bending. The higher wood density, the higher values of the mechanical properties. Ordering provenances by the wood density demonstrates the same results as ordering by values of compression strength parallel to grain. The high values of density and mechanical properties prove good technical quality of the analysed wood. The structural properties (the average tree−ring width and the share of latewood) are correlated to the wood density as well. They are additional features to describe wood quality, but are not as accurate as the mechanical properties. The quality of wood from all investigated provenances is high, what makes impossible to distinguish wood from selected provenances using applied features. Wood from Nowe Ramuki and Kartuzy (i.e. lowland) provenances has the best quality parameters, while one from Istebna Bukowiec and Stronie Śląskie (mountain) provenances demonstrated the worst properties (tab. 2). The results do not prove the opinion about the best quality of Norway spruce wood originating from the mountains.
Źródło:: Sylwan; 2017, 161, 10; 851-860
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Jakość techniczna drewna 35-letnich świerków (Picea abies L. H. Karst) rosnących na powierzchni proweniencyjnej w LZD Rogów
Technical quality of wood of 35 years old Norway spruce (Picea abies L. H. Karst) growing on experimental plot in the Rogow Forest Experimental Station
Autorzy:: Bieniasz, A.
Lachowicz, H.
Buraczyk, W.
Moskalik, T.
Powiązania:: https://bibliotekanauki.pl/articles/986716.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
drzewnictwo
swierk pospolity
Picea abies
proweniencje
drewno swierkowe
jakosc techniczna
wlasciwosci mechaniczne
wlasciwosci fizyczne
struktura drewna
wood properties
structural
mechanical and physical parameters
conifer timber
Opis:: The aim of this paper is to investigate and compare structural, mechanical and physical properties of wood of Norway spruce growing on experimental plot in Rogów (central Poland). The planting material consisted of seeds sourced from six selected provenances. Three of them originated from lowlands, while the others have mountain origins (tab. 1). The plot was established in 1975 and the wood was harvested in 2010. Wood samples were prepared and measured according to the Polish Standards describing those procedures. The following properties were subjected to the research and statistical analyses: average tree−ring width, share of latewood, wood density, compression strength parallel to grain, static bending, modulus of elasticity in static bending and the coeffi− cients of compression strength parallel to grain, static bending, and modulus of elasticity in static bending. Results of the investigation were correlated in the frame of each provenance. Wood density determines values of compression strength parallel to grain, static bending and modulus of elasticity in static bending. The higher wood density, the higher values of the mechanical properties. Ordering provenances by the wood density demonstrates the same results as ordering by values of compression strength parallel to grain. The high values of density and mechanical properties prove good technical quality of the analysed wood. The structural properties (the average tree−ring width and the share of latewood) are correlated to the wood density as well. They are additional features to describe wood quality, but are not as accurate as the mechanical properties. The quality of wood from all investigated provenances is high, what makes impossible to distinguish wood from selected provenances using applied features. Wood from Nowe Ramuki and Kartuzy (i.e. lowland) provenances has the best quality parameters, while one from Istebna Bukowiec and Stronie Śląskie (mountain) provenances demonstrated the worst properties (tab. 2). The results do not prove the opinion about the best quality of Norway spruce wood originating from the mountains.
Źródło:: Sylwan; 2017, 161, 10; 851-860
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Klasyfikacja surowca wybranych gatunków według norm polskich i Unii Europejskiej
Classification of wood of selected tree species according to the Polish and the EU standards
Autorzy:: Michalec, K.
Wąsik, K.
Barszcz, A.
Groń, A.
Powiązania:: https://bibliotekanauki.pl/articles/989278.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
surowce drzewne
drewno bukowe
drewno debowe
drewno jodlowe
drewno swierkowe
wady drewna
jakosc drewna
klasyfikacja drewna
normy unijne
normy polskie
raw wood
wood defects
wood value
softwood
hardwood
Opis:: The aim of this paper was to perform a comparative analysis of the quality and the value of beech, oak, fir and spruce wood classified according to the Polish and the EU standards. The research was carried out in Lesko and Baligród forest districts (south−eastern Poland). The measurements of the investigated raw wood were taken at the upper landings. With regard to fir, spruce and beech 50 specimens per species were measured, while in the case of oak only 25 pieces were examined. Each specimen was classified in respect of its quality and size according to the Polish standards (PN) and the European Union (PN−EN) standards. Then, the results of both classifications were compared in terms of the share of volumes of particular wood quality classes, the impact of wood defects on the raw wood classification results, and the value of wood determined by the means of both standards. With regard to the beech wood, the share of the poorest class D upon applying PN−EN was smaller than that for PN norms. This decrease was in favour of other classes, due to which the value of the entire beech wood increased by ca. 16%, when classified with the use of the EU standards. The oak wood revealed a slight increase in the share of wood volume in the class C and a decrease in the class D of PN−EN when compared with the Polish norms. The value of the oak wood classified with the use of the EU standards was merely by 2.3% higher than that of the Polish norms. With regard to the softwood (fir and spruce), a decrease in the share of wood of the class C in PN−EN was recorded, which was in favour of the classes B and D. The value of raw wood classified by means of the EU standards was lower for both of the coniferous species. The decrease for fir accounted for 13.3%, while for spruce it was only 1.5%. For the evaluation of the softwood, Polish classification was more profitable, whereas for hardwood the EU standards were more favourable.
Źródło:: Sylwan; 2016, 160, 06; 459-465
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Kształtowanie się jakości surowca świerkowego w zależności od wysokości nad poziomem morza i wystawy
The effect of altitude and exposure on the quality of spruce timber
Autorzy:: Michalec, K.
Powiązania:: https://bibliotekanauki.pl/articles/973869.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: Picea abies
jakosc
czynniki siedliska
ekspozycja terenu
leśnictwo
drzewa leśne
świerk pospolity
drewno świerkowe
wysokość nad poziomem morza
spruce
timber quality
wood defects
altitude
exposure
Polska
Opis:: Mountain regions are the main natural ranges of spruce forests in Poland. Their occurrence and growth in these areas is associated with the height above sea level and exposure. The attempt of the study was to determine the impact of these two characteristics on the quality of spruce timber. The research was carried out on 20 sample plots located in the Sudety (8 plots) and the Carpathians (12 plots). The trees growing on the selected plots were examined for their diameter at breast height and height, the quality of standing timber and the kinds and varieties of wood defects on tree stems. As a result of the conducted analyses it could generally be stated that forest stands from the lower montane zone produced higher quality timber in terms of both volume and quality and that the best quality stands were on the western and the poorest ones – on the southern slopes.
Źródło:: Sylwan; 2011, 155, 06; 373-383
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Ligninolityczne właściwości izolatów Heterobasidion parviporum w hodowli na drewnie świerka
Ligninolytic activity of Heterobasidion parviporum isolates in cultivation on Norway spruce wood
Autorzy:: Żółciak, A.
Bohacz, J.
Powiązania:: https://bibliotekanauki.pl/articles/989467.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
fitopatologia lesna
grzyby
Heterobasidion parviporum
izolaty grzybowe
aktywnosc lignolityczna
enzymy lignolityczne
lakaza
peroksydaza manganozalezna
peroksydaza ligninowa
peroksydaza "versatile"
rozklad drewna
drewno bielu
drewno twardzieli
drewno swierkowe
biodegradacja
laccase
manganese peroxidase
lignin peroxidase
versatile peroxidase
hydroxy−
methoxyphenols
sapwood
heartwood
norway spruce wood
Opis:: The aim of this preliminary study was to assess the activity of laccase, diverse peroxidases as well as the level of micromolecular compounds in Heterobasidion parviporum isolates grown on pieces of Norway spruce wood (sapwood and heartwood) during 50 days of incubation under the laboratory conditions. H. parviporum isolates secreted extracellular enzymes: laccase, manganese peroxidase (MnP), lignin peroxidase (LiP) and versatile peroxidase (VP). Hydroxy− and methoxyphenols were also released during this process. The above−mentioned enzymes showed low activity in mycelium grown on both sapwood and heartwood. The activity of laccase ranged from 0 to 0.513 mU/mg protein on sapwood, and from 0 to 0.106 mU/mg protein – on heartwood. MnP activity of H. parviporum isolates ranged from 0.024 to 0.667 mU/mg protein on sapwood, and from 0.038 to 1.585 mU/mg protein – on heartwood. LiP activity was small and ranged from 0 to 1.281 mU/mg protein on sapwood, and from 0.013 to 0.166 mU/mg protein – on heartwood. Activity of VP oxidizing manganese ions was low. It ranged from 0 to 3.063 mU/mg protein on sapwood, and from 0.059 to 3.054 mU/mg protein – on heartwood. The activity of VP oxidizing guaiacol ranged from 0.006 to 1.490 mU/mg protein on sapwood and from 0.038 to 1.147 mU/mg protein – on heartwood. The hydroxyphenols produced by H. parviporum isolates ranged from 15.037 to 110.149 mg of protocatechuic acid/ml on sapwood, and from 11.236 to 27.220 mg of protocatechuic acid/ml – on heartwood. Methoxyphenols produced by H. parviporum isolates ranged from 3.393 to 24.253 mg of vanillic acid/ml on sapwood, and from 4.955 to 12.005 mg of vanillic acid/ml – on heartwood.
Źródło:: Sylwan; 2016, 160, 12; 1027-1035
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Niewidoczny świat mikrostawonogów (Acari, Collembola) w martwym drewnie świerkowym w Babiogórskim Parku Narodowym
The unseen world of microarthropods [Acari, Collembola] of spruce dead wood in the Babia Gora National Park
Autorzy:: Skubała, P.
Maślak, M.
Powiązania:: https://bibliotekanauki.pl/articles/1012278.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: fauna
Babiogorski Park Narodowy
lesnictwo
parki narodowe
Collembola
stawonogi
Oribatida
skoczogonki
Acari
bogactwo gatunkowe
drewno swierkowe
drewno martwe
roztocze
acari
collembola
downed logs
dead wood
spruce
Opis:: The article presents results of the research on microarthropods (Acari and Collembola) inhabiting fallen spruce trees. The research was conducted in the spruce forest Plagiothecio−Piceetum tatricum typicum in the Babia Góra National Park, Carpathian Mountains. Five downed spruce logs in different stage of decay and neighbouring soil were sampled seasonally. Over 91 thousands specimens of mites and springtails were collected in 140 samples. Changes in population densities of different groups of microarthropod with the age of the dead wood was analysed and compared with densities in forest litter and soil. The total number of microarthopods inhabiting downed spruce logs on the area of hectare in the studied forest was estimated.
Źródło:: Sylwan; 2009, 153, 05; 346-353
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Określenie współczynników zamiennych dla drewna wielkowymiarowego kłodowanego sosnowego i świerkowego
Determination of conversion factors for pine and spruce logs in stacks
Autorzy:: Witkowska, J.
Jodlowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/46096.pdf
Data publikacji:: 2019
Wydawca:: Instytut Badawczy Leśnictwa
Tematy:: lesnictwo
drewno wielkowymiarowe
drewno sosnowe
drewno swierkowe
stosy drewna
miazszosc drewna
pomiary drewna
wspolczynniki zamienne
Źródło:: Leśne Prace Badawcze; 2019, 80, 3
1732-9442
2082-8926
Pojawia się w:: Leśne Prace Badawcze
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Określenie współczynników zamiennych dla wybranych długości drewna średniowymiarowego sosnowego i świerkowego grupy S2
Determining conversion factors for medium-sized pine and spruce wood
Autorzy:: Witkowska, J.
Jodlowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/46354.pdf
Data publikacji:: 2018
Wydawca:: Instytut Badawczy Leśnictwa
Tematy:: lesnictwo
drewno sosnowe
drewno swierkowe
drewno sredniowymiarowe
stosy drewna
miazszosc drewna
pomiary
wspolczynniki zamienne
Źródło:: Leśne Prace Badawcze; 2018, 79, 1
1732-9442
2082-8926
Pojawia się w:: Leśne Prace Badawcze
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Porównanie ilości martwego drewna leżącego w drzewostanach sosnowych i świerkowych Skandynawii przy różnych szerokościach geograficznych
Comparison of the amount of dead wood resources in Scots pine and Norway spruce stands at different latitudes in Scandinavia
Autorzy:: Tomusiak, R.
Kedziora, W.
Krzemien, W.
Moskwa, A.
Karbownik, O.
Mazur, R.
Powiązania:: https://bibliotekanauki.pl/articles/881703.pdf
Data publikacji:: 2014
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:: lesnictwo
drzewostany sosnowe
drzewostany swierkowe
sosna zwyczajna
Pinus sylvestris
swierk pospolity
Picea abies
drewno martwe lezace
ilosc drewna martwego
gradient szerokosci geograficznej
Szwecja
Norwegia
Źródło:: Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2014, 16, 4[41]
1509-1414
Pojawia się w:: Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: Problem masowego zamierania drzewostanów świerkowych w Leśnym Kompleksie Promocyjnym "Puszcza Białowieska"
Problem of a massive dying-off of Norway spruce stands in the 'Bialowieza Forest' Forest Promotional Complex
Autorzy:: Brzeziecki, B.
Hilszczański, J.
Kowalski, T.
Łakomy, P.
Małek, S.
Miścicki, S.
Modrzyński, J.
Sowa, J.
Starzyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/985913.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
lesne kompleksy promocyjne
Lesny Kompleks Promocyjny Puszcza Bialowieska
drzewostany swierkowe
stan sanitarny
zagrozenia drzewostanow
szkodniki roslin
kornik drukarz
Ips typographus
dynamika populacji
gradacja
drewno martwe
grzyby patogeniczne
zagrozenie pozarowe
zamieranie lasow
norway spruce bark beetle infestation
białowieża forest
ecosystem stability
multifunctional forestry
natura 2000 plc200004
natural values
world heritage site
Opis:: The Białowieża Forest (BF) is in many respects an exceptional object, of a great importance for nature protection and forest management, at the international scale. The BF plays also a key role from the point of view of regional development and welfare of local community. In the last period, a big threat for multiple values of the BF has arisen, as a result of enormous bark beetle infestation, which started in 2012 and has killed 1.4 million m3 of spruce trees. In the paper, first, a brief overview of the general history of the BF and an account of long−term human impacts on its functioning and structure is provided. Next, the history of bark beetle infestations in the BF is analysed. It is shown that, in the period 1992−2007, the average volume of spruces killed by bark beetle amounted on average to 20,000 m3 of wood annually. During that period practically all dead trees were removed from the forest by means of salvation cuttings. Starting from 2008, more and more trees infested by European spruce bark beetle were left in the forest, in a result of a pressure exerted by environmental groups. In 2012, Minister of Environment decided to reduce the allowable cut, determined in forest management plans elaborated for the managed part of the BF, from 107,000 to 48,500 m3/year. This decision, along with several other regulations and restrictions, made in practice impossible to stop the development of a current bark beetle infestation, which started in 2011 and intensified during the next 6 years (solely in 2016 bark beetles killed 480,000 m3 of spruce trees). In the paper, the most important implications and consequences of the current situation are briefly summarized and discussed. A special attention is given to the problems concerning: 1) protection of Natura 2000 species and sites (endangered by bark beetle outbreak), 2) a negative influence of large amounts of spruce deadwood on forest soils, 3) threats caused by pathogenic fungi, 4) question of public safety, 5) fire hazard, and 6) economical dimension. The legal and socio−economical foundations of the functioning of Hajnówka, Browsk and Białowieża forest districts comprising the managed part of the BF, as well as their most important environmental and social consequences are discussed too. Among others, it is indicated that, under current conditions of the BF, human intervention plays a key role in maintaining stable and compositionally diverse woodland communities. Finally, several suggestions and recommendations are provided, aimed at, in the short term, breaking off the current bark beetle outbreak, and, in the long term, at maintaining a multifunctional character of the BF and its ability to provide all important ecosystem services on a sustainable basis.
Źródło:: Sylwan; 2018, 162, 05; 373-386
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: Proweniencyjna zmienność częstości fluktuacji gęstości drewna (IADFs) świerka pospolitego
Variation in intra-annual density fluctuations (IADFs) of Norway spruce provenances in Poland
Autorzy:: Klisz, M.
Ukalska, J.
Wrzesinski, P.
Wilczynski, S.
Jastrzebowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/881012.pdf
Data publikacji:: 2016
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:: drzewa
swierk pospolity
Picea abies
drewno swierkowe
gestosc drewna
czestosc fluktuacji
zmiennosc proweniencyjna
Źródło:: Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2016, 18, 3[48]
1509-1414
Pojawia się w:: Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:: Biblioteka Nauki