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Wyświetlanie 1-15 z 20
Tytuł:
Orientacja micel celulozy w zależności od położenia w pniu świerka pospolitego przedstawiona za pomocą dyfrakcji promieni X
Orientation of cellulose micelles in relation to situation in a stem of Norway spruce tree, shown with the aid of X-ray diffraction
Autorzy:
Kocon, J.
Powiązania:
https://bibliotekanauki.pl/articles/814090.pdf
Data publikacji:
1985
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1985, 129, 03
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uszkodzenia drzew w następstwie trzebieży wczesnych w nizinnych drzewostanach świerkowych
Tree damage in lowland spruce stands caused by early thinnings
Autorzy:
Bembenek, M.
Giefing, D.F.
Karaszewski, Z.
Mederski, P.S.
Szczepańska-Alvarez, A.
Powiązania:
https://bibliotekanauki.pl/articles/991597.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
uzytkowanie lasu
drzewostany nizinne
trzebiez wczesna
drzewostany swierkowe
swierk
uszkodzenia drzew
spruce
tree damage
timber harvest methods
early thinning
Opis:
The paper presents analysis of tree damage after early thinning in lowland spruce stands. Percentage of tree with damage and weighted damage index (WDI) were considered. Three different thinning operations were analysed, in which different cutting method was applied. The smallest level of damage was observed when short wood system (SWS) was used. There were no significant differences between frequency of damage when full tree (FTS) and long wood (LWS) systems were compared.
Źródło:
Sylwan; 2013, 157, 10; 747-753
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany tendencji wzrostowych głównych lasotwórczych gatunków drzew w Europie i obszarach górskich Polski oraz ich przyczyny. Część I. Zmiany tendencji wzrostowych
Growth trends of the European main forest tree species and potential causes. Part I. Changes in growth trends
Autorzy:
Jaworski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1026478.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
gatunki lasotworcze
Polska
Quercus
lesnictwo
Picea abies
Europa
Pinus sylvestris
wzrost roslin
buk zwyczajny
Abies alba
sosna zwyczajna
dab
jodla
Fagus sylvatica
przyrost drzew
drzewa lesne
swierk pospolity
increment
volume
european beech
scots pine
norway spruce
silver fir
sessile oak
Opis:
The paper provides information concerning the growth of pine, spruce, oak, beech and fir stands based on the research conducted by the European Forest Institute in a number of the European countries and in Poland. Noteworthy i.a. is the increase in volume increment of spruce and pine in some stands in Germany up to 250% of the values given in the yield tables. Since the early fifties of the past century beech and sessile oak in Bavaria have exhibited an increase in the height growth and volume increment. Their values markedly exceed those provided in the tables. Fir, similar to spruce, pine and beech shows the reduction in the increment and dieback in the regions under heavy industrial pollution. However in other regions under the impact of air pollution the response of pure and multispecies stands with the share of fir was positive. In Poland, a rapid decline in the dbh increment in three tree species (fir, spruce, pine) in the seventies was greater than in the sixties. In 1981−1989, fir showed a favourable growth in diameter; this positive tendency was noticed in the whole range of fir distribution in Poland, though the increment did not return to the level before its decline. The pine increment regenerated after 1990. The poorest increment was found in spruce in the eighties following its collapse in the seventies (Żywiecki and Śląski Beskid).
Źródło:
Sylwan; 2003, 147, 06; 99-106
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uszkodzenia drzew w nizinnych drzewostanach świerkowych podczas zabiegu trzebieży późnej
Tree damage in lowland spruce stands because of late thinning
Autorzy:
Bembenek, M.
Giefling, D.F.
Karaszewski, Z.
Mederski, P.S.
Szczepańska-Alvarez, A.
Powiązania:
https://bibliotekanauki.pl/articles/993989.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
uzytkowanie lasu
drzewostany nizinne
trzebiez pozna
pozyskiwanie drewna
metody pozyskiwania drewna
drzewostany swierkowe
swierk
uszkodzenia drzew
norway spruce
tree damage
thinning operations
Opis:
The paper studies tree damage after late thinning operation in lowland spruce stands. The research was done in the 4ͭʰ age class stands, where three different methods of timber harvesting were applied: full tree system (FTS), long wood system (LWS), short wood system (SWS). The lowest level of damage was observed in SWS.
Źródło:
Sylwan; 2013, 157, 12; 892-898
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena dokładności stałych krzywych wysokości dla drzewostanów świerkowych
Assessment of the accuracy of uniform height curves for spruce stands
Autorzy:
Socha, J.
Powiązania:
https://bibliotekanauki.pl/articles/1023142.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
stale krzywe wysokosci
dendrometria
drzewostany swierkowe
Picea abies
lesnictwo
dokladnosc
swierk pospolity
drzewa lesne
tree height
height curve
uniform height curves
norway spruce
Opis:
The paper presents assessment results of the accuracy of uniform height curves developed for mountain spruce stands of Poland [Bruchwald, Wróblewski 1994]. The empirical material was collected in 171 spruce stands in Beskid Zachodni. Moreover, the relationship between the errors of uniform height curves and dendrometric characteristics of stands was also analysed. The research results demonstrated that the accuracy of uniform height curves is close to the accuracy obtained by applying the height curve developed for a given stand.
Źródło:
Sylwan; 2004, 148, 06; 3-9
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wskaźnika zadrzewienia drzewostanu na wybrane cechy makrostruktury i gęstość drewna świerkowego (Picea abies (L.) Karst.)
Effect of stand density index on selected features of macrostructure and density of Norway spruce (Picea abies (L.) Karst.) wood
Autorzy:
Michalec, K.
Powiązania:
https://bibliotekanauki.pl/articles/978906.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
tree−ring width
latewood proportion
wood density
Norway spruce
Opis:
The aim of the study was to determine the influence of stand density index on the tree−ring width, latewood proportion and wood density for Norway spruce. Study sites were located as follows: 12 within the north−eastern species range in Poland, 7 in the south−western range, in the Sudety Mts., and 9 in the Carpathians (southern range). Clustering stands according to their stand density index, 10 data groups were established: stand density index values from 0.3 to 1.2. The study plots were 100×100 m squares. On each plot 15 trees were chosen and increment cores were sampled using the Pressler borer. The smoothed cores served for measuring the width of annual rings, latewood zones and the share of latewood as well as for determination of relative wood density. The performed analyses indicate that mean tree−ring width was the highest in trees from stands with density index from 0.3 to 0.8 (with the exception of 0.7), whereas the it was gradually decreasing in stands with index higher than 0.9. The statistically significant differences between the analyzed stands were observed (p<0.0001). The analysis of the influence of stand density index and the width of annual rings revealed significant, negative weak correlation (r=–0.242, p<0.001). In turn, the latewood proportion was the highest in trees from stands characterised by the highest stand density index and the lowest in trees from stands with the lowest one. The differences between analyzed groups of stands were statistically significant (p<0.0001), as well as the correlation which was significant, positive and weak (r=0.269, p<0.001). Wood density was the highest in trees from stands with the highest stand density index (1.1 – 363 kg/m3 i 1.2 – 365 kg/m3) as well as in those from stands characterised by 0.7 density index (369 kg/m3). Significant differences were observed (p<0.0001) only between stand density index 0.3−0.7 and 0.7−0.8. Significant correlation was not observed.
Źródło:
Sylwan; 2020, 164, 09; 719-725
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lata wskaźnikowe świerka pospolitego w Beskidach Zachodnich
Pointer years of Norway spruce in the Western Beskidy Mountains (southern Poland)
Autorzy:
Wilczyński, S.
Szymański, N.
Powiązania:
https://bibliotekanauki.pl/articles/991365.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
gory
Beskidy Zachodnie
drzewa lesne
swierk pospolity
przyrost drzew
sloje przyrostu rocznego
przyrost grubosci
czynniki klimatyczne
lata wskaznikowe
tree rings
pointer years
norway spruce
western beskidy mountains
altitudinal zone
Opis:
The frequency of site and zonal pointer years in Norway spruce in two altitudinal zones (500−900 m and 900−1370 m a.s.l.) in the Western Beskidy Mountains was analysed. In total, 32 tree stands were studied – 16 in each zone. In both zones number of negative site pointer years increased along with increase of number of positive site pointer years. Above 900 m a. s. l. number of site pointer years increased along with the altitude, while below 900 m a.s.l. their number decreased along with the altitude. We found no common pointer years for all 32 populations. In lower zone, short winter, early and very warm spring or high precipitation in June and July in a given year caused negative pointer years. In the upper one positive pointer years occurred after the warm autumn and in years with the warm growing season.
Źródło:
Sylwan; 2014, 158, 12; 883-892
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena dokładności wybranych sposobów określania miąższości drzew stojących w górskich drzewostanach świerkowych
Accuracy assessment of the selected methods for the determination of standing tree volume in the mountain spruce stands
Autorzy:
Socha, J.
Powiązania:
https://bibliotekanauki.pl/articles/973273.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
dendrometria
wzory empiryczne
drzwostany świerkowe
lasy górskie
tablice miąższości
leśnictwo
dokładność
miąższość drzew
tree volume
volume tables
empirical equations
accuracy assessment
Opis:
On the basis of data obtained from sectional measurements of tree diameters carried out in five final spruce crops in Beskid Śląski and Beskid Żywiecki it could be proved that volume tables by Grundner−Schwappach [1906] are most precise. The analyses pointed to the low accuracy of commonly used Radwański tables worked out by Czuraj [Czuraj 1998], which are currently being edited.
Źródło:
Sylwan; 2003, 147, 04; 78-86
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reakcja przyrostowa świerka w powiązaniu ze stopniem uszkodzenia korony
Increment reaction of Norway spruce in connection with the crown damage level
Autorzy:
Bruchwald, A.
Dmyterko, E.
Powiązania:
https://bibliotekanauki.pl/articles/1016122.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
korony drzew
stopien uszkodzenia
Picea abies
lesnictwo
piersnice drzew
przyrosty roczne
przyrost drzew
swierk pospolity
drzewa lesne
increment of the diameter at the breast height
increment reaction
criteria of the assessment
the damage to trees
defoliation
vitality
tree−top condition
norway spruce
Opis:
The study presents the analysis of the increment of tree diameter at the breast height in connection with two variants of the method of assessment the damage to Norway spruce stands. Variants utilise different assessment criteria. The first one is based on the tree's defoliation, the other one – on the damage index W that links defoliation, condition of the tree−top and branching in the middle part of the crown. Detected relations between damage criteria and type of the increment reaction show that index W characterises the damage to trees and stands better than feature A (defoliation). Therefore, method of assessment the damage to trees and stands based on this parameter is suggested for utilisation in the forestry practice.
Źródło:
Sylwan; 2007, 151, 11; 22-34
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Datowanie dendrochronologiczne drewna z obudów górniczych w kopalni złota w Złotym Stoku
Dendrochronological dating of timbers wood in the gold mine from Złoty Stok
Autorzy:
Szychowska-Krąpiec, E.
Powiązania:
https://bibliotekanauki.pl/articles/1022706.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drewno sosnowe
Kopalnia Zlota Zloty Stok
dendrochronologia
drewno kopalniane
drewno jodlowe
datowanie
lesnictwo
tree−ring analysis
dating
spruce
fir
scots pine
mine
Opis:
The research carried out was aimed at dendrochronological analysis of old timbers from the Gold Mine in Złoty Stok. The analysis resulted in 15 absolute datings of timbers of two tree species: Scots pine and fir. The established data fell into four last centuries. The oldest date, after 1667 AD, was obtained for fir wood from timbering of a shaft in the Masters' Adit (sztolnia Mistrzów), whereas the youngest one, after 1941 AD – for pine wood from the Prince's Adit.
Źródło:
Sylwan; 2005, 149, 12; 53-59
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wieloletnie zmiany składu gatunkowego drzewostanów naturalnych w Puszczy Białowieskiej
Long-term changes of tree species composition in natural stands of the Bialowieza Forest
Autorzy:
Paluch, R.
Powiązania:
https://bibliotekanauki.pl/articles/989856.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Puszcza Bialowieska
drzewostany naturalne
zmiany skladu gatunkowego
struktura drzewostanu
kierunki zmian
tempo zmian
białowieża national park
natural stands
undergrowth
hornbeam expansion
spruce reduction
Opis:
In the paper the long term dynamics (about 40 years) of selected, the most important, natural forest stands of the Białowieża Forest were presented. The studies were carried out on 120 permanent study plots, located both in nature reserves and in the Białowieża National Park. The DBH of all the trees were measured and the number of all the individuals trees and shrubs species with the height under 1,3 m was counted. The analysis of tree species composition and their density changes was carried out, as well as their natural regeneration was analyzed. The strong expansion of hornbeam were observed (fig. 1a, b; tab.). Actually this species was predominant in forest stands, in natural regeneration and was expansive to the more oligotrophic and mezotrophic forest stands, causing their unification towards hornbeam forest. Norway spruce generally declined in abundance and became limited to oligotrophic forest communities. Significantly reduction this species were observed, especially on the mixed coniferous forest at mixed deciduous forest stands. Scots pine, oak and birch declined their share in forest stands, as well as their natural regeneration have been limited too (tab.). In the short time of the last 15 years, the strong reduction of ash share in forest stands has been observed, and the more rapid changes in all the forest stands composition as well.
Źródło:
Sylwan; 2015, 159, 04; 278-288
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stopień uszkodzenia świerka, jodły i modrzewia w Sudetach Zachodnich
Degree of damage to spruce, fir and larch stands in the Western Sudetes
Autorzy:
Korzybski, D.
Mionskowski, M.
Dmyterko, E.
Bruchwald, A.
Powiązania:
https://bibliotekanauki.pl/articles/993196.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
lasy gorskie
drzewostany swierkowe
drzewostany jodlowe
drzewostany modrzewiowe
drzewa lesne
swierk
Picea
jodla
Abies
modrzew
Larix
uszkodzenia drzew
stopien uszkodzenia
defoliacja
stopien defoliacji
zywotnosc
stan wierzcholka drzewa
Nadlesnictwo Kamienna Gora
Nadlesnictwo Szklarska Poreba
Nadlesnictwo Sniezka
Nadlesnictwo Swieradow
Sudety Zachodnie
tree damage index
defoliation
tree growth response
Opis:
The aim of this research was to assess damage to three important forest−forming trees species in the mountains – spruce, fir and larch, and to study their increment reaction to changing environmental conditions. Research concerned forests under the management of four forest districts located in the Western Sudetes (SW Poland). Index W ranging from 0 to 3 was used for the assessment of the damage to trees based on three crown characteristics: defoliation, top−crown condition and tree vitality. Trees of damage degree 2 dominated in each of the species; dying trees (degree 3) were also found. Total share of these two degrees of damage was ca 80% for spruce, 84% for fir and 74% for larch. Analysis of increment reaction of investigated species showed their similar response to changes in the environment. The increase in the share of trees showing positive responses and the decrease in the share of negative responses in the past half century, indicate an improvement in the growth conditions of spruce, fir and larch in Western Sudetes.
Źródło:
Sylwan; 2013, 157, 02; 104-112
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statystyczna ocena przebiegu wzrostu wysokości sosny i świerka, przy różnym udziale gatunku drzewa w składzie drzewostanu
Statisticheskaja ocenka dinamiki rosta po vysote sosny i eli pri raznom uchasti drevesnykh porod v sostave nasazhdenija
Statistical evaluation of the course of height growth in pine and spruce with various proportions of those tree species in stand composition
Autorzy:
Mis, R.
Powiązania:
https://bibliotekanauki.pl/articles/825609.pdf
Data publikacji:
1972
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1972, 116, 02
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 20

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