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Tytuł:
Zroznicowanie gestosci drewna populacji swierka na powierzchni doswiadczalnej w Knyszynie w relacji do zroznicowania populacji matecznych
Autorzy:
Matras, J.
Powiązania:
https://bibliotekanauki.pl/articles/969158.pdf
Data publikacji:
2001
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
odziedziczalnosc
gestosc drewna
populacje macierzyste
drewno swierkowe
Picea abies
lesnictwo
populacje potomne
zmiennosc
swierk pospolity
drzewa lesne
Źródło:
Prace Instytutu Badawczego Leśnictwa. Seria A; 2001, 2[913-916]; 21-33
0369-9870
Pojawia się w:
Prace Instytutu Badawczego Leśnictwa. Seria A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gęstość drewna sosny zwyczajnej (Pinus sylvestris L.) jako wskaźnik odporności drzewa na działanie silnych wiatrów
Density of Scots pine (Pinus sylvestris L.) wood as an indicator of tree resistance to strong winds
Autorzy:
Tomczak, A.
Jelonek, T.
Jakubowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/991495.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
odpornosc na wiatr
sosna zwyczajna
Pinus sylvestris
gestosc drewna
scots pine
windthrow
basic wood density
Opis:
We assumed that wood of trees undamaged by wind will be characterized by higher basic density than wood of damaged specimens. It was stated that wood of windthrow had lower basic density, but differences were not statistically significant. Two parts of wood: (compressed and tensioned zones) were analyzed separately. Higher density was found in tensioned zone of windthrow and in compressed zone in control trees. Similar results were obtained in samples of extreme.
Źródło:
Sylwan; 2013, 157, 07; 539-545
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Budowa morfologiczna drzew oraz podstawowe wlasciwosci drewna jaworu [Acer pseudoplatanus L.] z wybranych stanowisk w Karpatach
Autorzy:
Niedzielska, B
Powiązania:
https://bibliotekanauki.pl/articles/823984.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
Tatry
Karpaty
gestosc wzgledna
budowa morfologiczna
klon jawor
przyrosty roczne
Bieszczady
Acer pseudoplatanus
gestosc drewna
wzgledna dlugosc korony
drewno jaworowe
Gorce
Beskid Sadecki
drzewa lesne
Źródło:
Sylwan; 2001, 145, 01; 47-55
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wlasciwosci drewna sosny zwyczajnej [Pinus sylvestris L.] na gruntach porolnych w polnocnej Polsce
Selected properties of wood in Scots pine [Pinus sylvestris L.] growing on post-agricultural land in northern Poland
Autorzy:
Jelonek, T.
Pazdrowski, W.
Tomczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/45924.pdf
Data publikacji:
2009
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
grunty porolne
zalesianie
drzewa lesne
sosna zwyczajna
Pinus sylvestris
drewno sosnowe
gestosc drewna
wytrzymalosc na sciskanie wzdluz wlokien
wzmocnienie desorpcyjne
Źródło:
Leśne Prace Badawcze; 2009, 70, 3; 277-286
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie wybranych właściwości fizycznych drewna młodocianego i dojrzałego sosny zwyczajnej (Pinus sylvestris L.) z drzewostanów rębnych
Comparison of selected physical properties of the juvenile and mature wood of Scots pine [Pinus sylvestris L.] from mature stands
Autorzy:
Tomczak, A.
Jelonek, T.
Zoń, L.
Powiązania:
https://bibliotekanauki.pl/articles/1009416.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewostany rebne
drzewa lesne
sosna zwyczajna
Pinus sylvestris
drewno dojrzale
drewno mlodociane
wlasciwosci fizyczne
gestosc drewna
gestosc umowna
kurczliwosc
juvenile wood
mature wood
basic density
shrinkage
scots pine
Opis:
The paper presents results of a comparative analysis of basic density and shrinkage of juvenile and mature wood of Scots pine (Pinus sylvestris L.). Mature wood turned to exhibit higher density and shrinkage. Differences are dependent on the location of a sample at the stem profile. Properties of juvenile wood exhibit higher variability in comparison to those of mature wood, especially in relation to shrinkage.
Źródło:
Sylwan; 2010, 154, 12; 809-817
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dokładność określania świeżej masy strzał jodły na podstawie przeliczników wagowo-objętościowych
Accuracy of estimation silver fir stem mass on the basis of volume to weight conversion factors
Autorzy:
Ochal, W.
Wertz, B.
Grabczyński, S.
Orzeł, S.
Powiązania:
https://bibliotekanauki.pl/articles/985798.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
jodla pospolita
Abies alba
biomasa drzewna
masa strzaly drzew
biomasa swieza
szacowanie biomasy
wspolczynniki wagowo-objetosciowe
gestosc drewna
abies alba
wood density
stem biomass
biomass estimation
Opis:
The paper describes the accuracy of estimation of silver fir stem fresh mass on the basis of volume to weight conversion factor, derived from samples, collected from few different places along the stem. The research material contained 13 sample trees selected from homogenous 70−years old stand, situated in mountainous area of the Beskid Sądecki in Polish part of the Carpathians (S Poland). Volume over the bark of sample trees was calculated with section−wise method and the whole stem fresh biomass was directly weighted. For each sample tree three stem discs were collected at 1/6, 1/2 and 5/6 of tree height, their weight and volume were precisely determined and the biomass conversion factors (equivalent of stem density) were calculated. The assessment of the accuracy of whole fresh stem biomass was conducted according to five variants: for the biomass conversion factors derived from each individual stem disc (lower, middle or upper), from weighted mean density and on the basis of the constructed mixed model, where relative height and diameter were treated as fixed effects and influence of individual trees was included as a random term. The volume of sample fir stems ranged from 0.15 to 2.22 m3, while their fresh biomass varied between 138.1 and 1896.7 kg. Obtained results show that variation of the density was higher within stems than between them (coefficient of variation amounted to 8.4% i 3.3% respectively). The average density increased along stem, from 835.6 kg/m3 for lower part (1/6H) to 986.8 kg/m3 for the upper part (5/6H). Estimating the biomass on the basis of just lower stem disc resulted in the average relative error equal to –5.8%, while for middle stem disc the error was +1.2%, and for upper disc +11.3%. The use of conversion factors derived from weighted average density of all three stem discs resulted in average bias equal to –1,7% with standard error 1,0%. Despite the presence of mean bias of –2.3%, the constructed density model gave the most precise estimation of the stem biomass (standard error 0.7%), which indicates the reasons for its further improvements and usage.
Źródło:
Sylwan; 2018, 162, 04; 277-287
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cechy diagnostyczne jesionu wyniosłego (Fraxinus excelsior L.) z falistością włókien rosnącego na Ukrainie
Diagnostic features of Fraxinus excelsior L. with wavy-grained wood growing in Ukraine
Autorzy:
Sopushynskyy, I.
Teischinger, A.
Powiązania:
https://bibliotekanauki.pl/articles/1318417.pdf
Data publikacji:
2013
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
Ukraina
drzewa lesne
jesion wyniosly
Fraxinus excelsior
cechy biometryczne
cechy morfologiczne
budowa drewna
gestosc drewna
drewno jesionowe
drewno falistowlokniste
analiza dendrochronologiczna
struktura drewna
makrostruktura
common ash
wavy-grained wood
biometry
decorative wood
anomaly wood
forest stands
Opis:
The paper presents analysis of biometric features of ash with wavy-grained wood, which has decorative appeal. The research results shows that fresh broadleaves ash forest stands growing in the Vinnytsya and Sokyryany Regions of Ukraine have high potential for growing curly ash. The differences between straight-grained and wavygrained wood density and macrostructure were analysed and estimated. Statistical evaluation of the aesthetic macrostructure of wood characteristics indicated that the length of wave varied from 3.25 to 10.83 mm and its amplitude varied from 0.37 to 1.74 mm. The average width and mean height of anomalies in wood formation were equal to 15.89 mm and 5.00 mm, and their mean occurrence was 30 times m-2. Average annual growth ring width of wavy-grained ash wood was clearly greater (by 25 %) than that of straight-grained wood. The density of wavygrained wood was 82 kg·m-3 higher than straight-grained wood after oven-drying and 70 kg·m-3 higher prior to ovendrying.
Źródło:
Leśne Prace Badawcze; 2013, 74, 3; 189-195
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność gęstości umownej drewna sosny zwyczajnej (Pinus sylvestris L.) w zależności od wybranych czynników
Variability of conventional wood density of Scots pine (Pinus sylvestris L.) depending on the selected factors
Autorzy:
Witkowska, J.
Lachowicz, H.
Powiązania:
https://bibliotekanauki.pl/articles/993205.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
sosna zwyczajna
Pinus sylvestris
drewno sosnowe
gestosc drewna
gestosc umowna
czynniki siedliska
polozenie geograficzne
typy siedliskowe lasu
wiek drzewostanu
gestosc na wysokosci piersnicy
gestosc w polowie dlugosci grubizny
gestosc w gornym koncu grubizny
scots pine
conventional wood density
forest habitat type
poland
Opis:
Paper presents analysis of differences in conventional wood density of Scots pine measured at breast height regarding the geographical location of stands, forest habitat type, stand age and associated parameters such as density in the mid−length of the stem, density in the upper end of the stem and diameter at breast height. To investigate the impact of these factors, an analysis of covariance was used in accordance with two models specifically developed for this purpose. We found dependence of conventional wood density on the type of forest habitat and geographical location of the stand. The highest density was detected in dry coniferous forests, while the smallest in fresh mixed coniferous forests. Scots pine wood from Zielona Góra Forest (western Poland) characterised with the highest density, while from the Knyszyn Primeval Forest (eastern Poland)− with the lowest.
Źródło:
Sylwan; 2013, 157, 05; 336-347
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Promieniowa zmienność właściwości drewna sosny zwyczajnej (Pinus sylvestris L.) wyrosłej na gruntach porolnych
Radial variation in the wood properties of Scots pine (Pinus sylvestris L.) grown on former agricultural soil
Autorzy:
Tomczak, A.
Jelonek, T.
Powiązania:
https://bibliotekanauki.pl/articles/1339968.pdf
Data publikacji:
2013
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
lesnictwo
drzewa lesne
sosna zwyczajna
Pinus sylvestris
drewno sosnowe
gestosc drewna
gestosc umowna
wytrzymalosc na sciskanie wzdluz wlokien
wytrzymalosc na zginanie statyczne
zmiennosc cech
czynniki siedliska
grunty porolne
basic density
static bending strength
compressive strength along fibers
Opis:
The soil of former farmland greatly differs from forest soil, and significantly influences tree growth and development compared with other site factors. The effect may also be reflected indirectly in radial variability of wood. This study compared radial variation of wood density, compressive strength along the grain and static bending strength of wood of Scots pine trees growing on former farmland and forest soils. The analyses were conducted in eight mature pine stands. On the basis of the stand description, four stands were classified as growing on forest soil (L) and four as growing on former farmland soil (P). A total of 24 model trees were selected, twelve on each soil type. Analyses of wood properties were conducted along four axes from the cross sectional radius of the treesat breast height. Our analyses showed that radial variation in wood properties of Scots pine (from selected locations in Poland) growing on former farmland is similar to the variation among the control trees growing on forest soils. In both groups of trees, the lowest density and the lowest strength were in the pith (juvenile) zone. Wood with the highest density and greatest strength was located in the central part of the radius. Wood of Scots pine trees growing on former farmland soils in comparison to that of trees growing on forest soil was characterised by a statistically lower basic density, lower compressive strength along the grain and static bending strength.
Źródło:
Leśne Prace Badawcze; 2013, 74, 2; 171-177
1732-9442
2082-8926
Pojawia się w:
Leśne Prace Badawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wieloczynnikowa analiza zmienności gęstości drewna brzozy brodawkowatej (Betula pendula Roth.)
Multivariate analysis of the variation in silver birch (Betula pendula Roth.) wood density
Autorzy:
Lachowicz, H.
Powiązania:
https://bibliotekanauki.pl/articles/1008805.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
brzoza brodawkowata
Betula pendula
drewno brzozowe
gestosc drewna
analiza zmiennosci
analiza wieloczynnikowa
klasy grubosci
wiek drzew
lokalizacja geograficzna
silver birch
wood density
physical−mechanical properties
Opis:
The aim of the research was to determine the variation in wood density of the silver birch in north−eastern Poland depending on the location (geographic region), age and interaction between these two factors, as well as the diameter of trees. Samples were taken for measurement from twelve sample plots with the trees aged 45 and 70 years growing in the fresh forest habitat. Statistical analysis was applied to the mean wood density values calculated for wood samples of the sizes: 20×20×300 mm, 20×20×30 mm and 30×2.66×0.1 mm. The study confirmed a significant effect of the location, simultaneous effect of the location and age, as well as the diameter of trees on the mean values of silver birch wood density for all examined sample sizes. No significant effect of the age on the mean values of birch wood density for all examined sample sizes was found. The mean value of wood density for the sample size 30×2.66×0.1 mm was the highest for the whole sampled material, amounting to 699.29 kg/m3, the wood density for the sample size 20×20×300 mm was lower – 681.04 kg/m3 and for the sample size 20×20×30 mm it was the lowest – 679.76 kg/m3.
Źródło:
Sylwan; 2012, 156, 06; 414-419
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wzmocnienie desorpcyjne jako podstawa oceny jakości drewna dębu szypułkowego (Quercus robur L.) i dębu burgundzkiego (Quercus cerris L.)
Desorption strengthening as a basis for the assessment of wood quality of pedunculate oak (Quercus robur L.) and Turkey oak (Quercus cerris L.)
Autorzy:
Szymański, M.
Szykowny, T.
Pazdrowski, W.
Nawrot, M.
Powiązania:
https://bibliotekanauki.pl/articles/994476.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewa lesne
dab szypulkowy
Quercus robur
dab burgundzki
Quercus cerris
drewno debowe
jakosc
gestosc drewna
gestosc umowna
wytrzymalosc na sciskanie wzdluz wlokien
wzmocnienie desorpcyjne
conventional wood density
compressive strength along the grain
basic strength
desorption strengthening
wood quality
Opis:
The analysis was conducted on the wood of two 100−year−old oak species that grew in the riparian forest conditions. The aim of the study was to determine the effect of tree species on conventional wood density, compressive strength along the grain with a moisture content of 12% and above 30% and desorption strengthening. It was found that wood of both oak species differed in density, compressive strength along the grain and desorption strengthening. These differences should be taken into account in the processing and use of timber harvested in the prescribed cuts.
Źródło:
Sylwan; 2013, 157, 11; 811-816
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jakość drewna sosny zwyczajnej (Pinus sylvestris L.) I. Charakterystyka wybranych cech i właściwości drewna wpływających na jego jakość
Quality of Scots pine [Pinus sylvestris L.] wood. Part I. Characteristics of selected wood traits and properties affecting its quality
Autorzy:
Tomczak, A.
Pazdrowski, W.
Jelonek, T.
Grzywiński, W.
Powiązania:
https://bibliotekanauki.pl/articles/1012211.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
jakosc
Pinus sylvestris
drewno pozne
drewno sosnowe
seki
drewno wczesne
gestosc drewna
drewno mlodociane
sloje przyrostu rocznego
sosna zwyczajna
drzewa lesne
wady drewna
wood quality
scots pine
knots
wood density
tree rings
latewood
juvenile wood
Opis:
The study presents the synthetic characteristic of selected wood tissue traits and properties (knots, tree rings, the proportion of latewood, juvenile wood, wood density, dimensions of anatomical elements, cell wall structure), which play significant role in modifications of wood quality. At individual stage of the raw material–product cycle the term "quality" may be interpreted differently, but characteristics determining it remain unchanged. Quality depends on the natural traits and properties of wood.
Źródło:
Sylwan; 2009, 153, 06; 363-372
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Związki między wybranymi parametrami korony a cechami makrostruktury i gęstością drewna daglezji zielonej (Pseudotsuga menziesii var. viridis Franco)
Relationships between selected crown parameters and the macrostructure properties and density of Douglas fir [Pseudotsuga menziesii var. viridis Franco] wood
Autorzy:
Wąsik, R.
Powiązania:
https://bibliotekanauki.pl/articles/1009000.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
daglezja zielona
Pseudotsuga menziesii
korony drzew
dlugosc korony
szerokosc korony
smuklosc korony
drewno daglezjowe
przyrosty roczne
sloje przyrostu rocznego
gestosc drewna
korelacja cech
douglas fir
wood
crown
poland
Opis:
The paper presents an analysis of interactions between the selected tree crown parameters and the macrostructure properties and density of wood of Douglas fir growing in the territory of Poland. The correlation coefficients between crown parameters and wood properties were calculated and difference significance tests were performed for the selected properties.
Źródło:
Sylwan; 2010, 154, 11; 783-790
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości drewna sosny zwyczajnej (Pinus sylvestris L.) pochodzącej z gruntów porolnych
Properties of wood of Scots pine [Pinus sylvestris L.] growing on former farmlands
Autorzy:
Jelonek, T.
Pazdrowski, W.
Arasimowicz-Jelonek, M.
Tomczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/1009458.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
grunty porolne
drzewa lesne
sosna zwyczajna
Pinus sylvestris
drewno sosnowe
jakosc
gestosc drewna
wlasciwosci mechaniczne
wytrzymalosc na sciskanie wzdluz wlokien
zginanie statyczne
wzmocnienie desorpcyjne
scots pine
wood quality
basic density
former farmland
juvenile wood
mature wood
desorption strengthening
Opis:
Analyses were conducted on wood from twelve Scots pines from northern Poland, aged 102 to 110 years, growing on former farmland and on forest grounds. The study was an attempt to determine basic density of wood, compressive strength along the grain, bending strength of absolutely dry wood and wood with moisture content above saturation point. Desorption strengthening was determined for analyzed strength properties of wood. Wood properties were determined in terms of juvenile and mature wood zones. Generally pines growing on former farmlands were characterized by wood with higher density and slightly lower strength than pines growing on typical forest soils. Conducted investigations indicate varied structure and properties of wood tissue formed in pines growing on former farmlands, which is different from that of typical forest soils.
Źródło:
Sylwan; 2010, 154, 05; 299-311
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność wybranych cech makrostruktury i gęstości drewna świerkowego (Picea abies (L.) Karst.) z regla dolnego i górnego
Variability of selected macrostructural features and density of Picea abies (L.) Karst. wood from lower and upper subalpine forest zones
Autorzy:
Michalec, K.
Wąsik, R.
Barszcz, A.
Powiązania:
https://bibliotekanauki.pl/articles/989498.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
wysokosc nad poziomem morza
lesnictwo
lasy gorskie
regiel gorny
regiel dolny
drzewa lesne
swierk pospolity
Picea abies
drewno swierkowe
drewno pozne
gestosc drewna
sloje przyrostu rocznego
szerokosc
czynniki siedliska
tree−ring width
latewood share
height above mean sea level
Opis:
The paper compares the properties of Norway spruce (Picea abies (L.) Karst.) wood from stands growing in the lower and upper subalpine forest zone in terms of the tree−ring width, the share of latewood and the wood density. The investigation concerned material originating from plots established within the boundaries of the south−western incidence of spruce in Poland. Plots were located in the Sudety Mts. and in the Carpathians (tab. 1). On each plot fifteen Norway spruces were chosen and increment cores were sampled using the Pressler borer. The surface of the cores was smoothed and the tree−ring width was measured. The latewood zones were determined and the share of latewood was calculated. Then, the cores were divided into 2 cm sections, for which the relative wood density was determined. Tree−rings were wider in trees growing in the lower when compared with those from the upper subalpine forest zone (tab. 2). Weak negative correlation was revealed between the elevation and the tree−ring width (r=–0.308). The latewood share was slightly higher in trees from the upper than those from the lower subalpine forest zone (tab. 2). However, no statistically significant correlation between the latewood share and elevation was recorded. The wood density was slightly lower in trees from the lower than those from the upper subalpine forest zone (tab. 2), but the difference was not statistically significant. The correlation between the wood density and the elevation turned out to be insignificant.
Źródło:
Sylwan; 2016, 160, 10; 855-860
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł

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