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Wyświetlanie 1-15 z 689
Tytuł:
Wykorzystanie zasobów Puszczy Noteckiej przez przemysł drzewny
Utilisation of resources of the Notecka Forest by woodworking industry
Autorzy:
Lis, W.
Popyk, W.
Powiązania:
https://bibliotekanauki.pl/articles/973081.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany
Puszcza Notecka
struktura wiekowa
surowce drzewne
baza surowcowa
skład gatunkowy
przemysł drzewny
zasoby leśne
leśnictwo
forest resources
utilisation
woodworking industry
Notecka /forest
Opis:
The paper focuses on the characterisation of forest resources and harvesting, sale and distribution of roundwood for woodworking industry, wood−derivative board production plants and pulp and paper indus−try in the Notecka Forest. The age and species structure of stands indicates that the analysed forest complex is and in the future can be an important supplier of timber for sawmills and pulp and paper mills, especially for the Wielkopolska region. The roundwood offered is of an ever more higher quality. A regular increase in proportion of trees in older age classes has caused that the Notecka Forest becomes a source of valuable timber for the sawmill and plywood industries. However, the long−term forms of cooperation between large sawmills and the State Forests Holding have to be perfected.
Źródło:
Sylwan; 2003, 147, 11; 86-93
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ pory sadzenia i technologii produkcji sadzonek na wzrost sosny zwyczajnej w doświadczeniu w Nadleśnictwie Oleśnica
Effect of planting time and seedling production technology on growth of Scots pine in the Olesnica Forest District experiment
Autorzy:
Barzdajn, W.
Kowalkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/989373.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
szkolki lesne
sosna zwyczajna
Pinus sylvestris
produkcja sadzonek
sadzonki z zakrytym systemem korzeniowym
sadzonki z odkrytym systemem korzeniowym
terminy sadzenia
mlodniki sosnowe
wzrost roslin
Nadlesnictwo Olesnica
scots pine
seedling production technology
planting time
Opis:
The aim of the study was to compare growth and survival of plug and bare−root seedlings planted at different dates. The experiment was established in 2003 in the Oleśnica Forest District (south−western Poland). Seedlings were planted at four dates: the end of August, September and October 2003 and the beginning of April 2004. The two−factorial experiment comprised eight treatments. It was established in the randomized complete block design in five replications. In each plot a total of 390 seedlings were planted. The objects were measured in the years 2004−2008 and 2013. At first height of all trees was measured using a scaled rod. In 2013 diameter at breast height was measured on all trees and height was measured for some randomly selected individuals. The ANOVA was supplemented with with Tukey's multiple comparison test. The height and diameter distributions in analysed variants were compared with Kolmogorov−Smirnov test. Treatments were found rather not to vary in terms of their survival rates (fig. 1). No variation was found for mean diameters at breast height (tab. 1). The difference between the treatment with the maximum (August planting, bare−root seedlings) and minimum (April planting, bare−root seedlings) tree height equaled 69 cm. No significant differences were recorded between mean heights of trees planted in August, September and October regarding the planting material type. Variation in basal area results both from survival rates and diameter at breast height. Only spring planting of bare−root seedlings was found significantly different from all other variants (tab. 1). Differences in height between the control and the mean for the experiment increased continuously (fig. 4). Scots pine seedlings may be successfully planted in late summer and autumn. Under relatively advantageous conditions, particularly moisture levels, 1 year old bare−root pine seedlings are not inferior to plug seedlings. Plug seedlings tolerate soil drought conditions better than bare−root seedlings. The effect of stress connected with drought after planting, measured by mean height, rather than disappearing, is continuously increasing with age.
Źródło:
Sylwan; 2016, 160, 02; 127-134
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Buk zwyczajny (Fagus sylvatica L.) polskich proweniencji w doświadczeniu z 1993 roku w nadleśnictwach Oleszyce i Baligród
Common beech (Fagus sylvatica L.) of Polish provenances in experiments established in 1993 in the Oleszyce and Baligrod forest districts
Autorzy:
Barzdajn, W.
Kowalkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/985917.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
drzewa lesne
buk zwyczajny
Fagus sylvatica
proweniencje krajowe
przezywalnosc
wzrost roslin
cechy morfologiczne
doswiadczenia proweniencyjne
Nadlesnictwo Oleszyce
Nadlesnictwo Baligrod
beech
provenance trial
growth and morphological traits
Opis:
The study objective was to verify the hypothesis on ecotypic variation in beech and ineffectiveness of transferring its reproductive material over larger distances. Beech nuts were collected in the autumn of 1990. Experimental sites were established in the Baligród and Oleszyce forest districts (SE Poland). On single plots of 18.00×13.75 m (247.5 m2), a total of 110 three−years−old seedlings were planted in a 1.50×1.25 m spacing in autumn 1993. Single row of mountain ash was left between the plots. In the period of 1994−2016 a series of analyses was conducted concerning adaptation, growth, phenological and qualitative traits. Height was measured on all trees using a measuring stick, except for the year 2016, when hypsometer was used to measure approximately 20 heights and remaining ones were determined based on the height curve. Results were analysed using univariate analysis of variance based on the random model, followed by Duncan’s multiple range test for each experimental site and year of the study. For 2016 ordering of populations in each of the experimental sites was compared using Spearman’s rank correlation test. In terms of survival rates in Oleszyce site the local provenance from Oleszyce proved to be superior. In all the years of the measurements it was characterised by the highest survival rate. In this respect the Komańcza and Lutowiska provenances from the Bieszczady Mountains turned out to be the worst ones. In the experimental site in Baligród, the Barlinek and Połczyn provenances outranked the others in terms of their survival rates, while in 2016 it was the population from Komańcza. Tree height effects in Oleszyce site showed that the local population from Oleszyce grows best, while the Pomeranian population from Jamy was also exceptional. The Bieszczady populations (Komańcza and Lutowiska) are characterised by the worst growth traits. In the experimental site in Baligród, the local Baligród population is characterised by poorest growth, similarly to the other ones from the Bieszczady. In terms of growth, the Western Pomeranian population from Gryfino is exceptional. As far as all the evaluated traits are concerned the investigated populations exhibit considerable variability, as no geographic ordination could be found. It was confirmed that imported populations, even from long distances, may exceed local populations in terms of their adaptation traits and growth rates.
Źródło:
Sylwan; 2018, 162, 05; 387-395
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przemiana sposobu zagospodarowania lasu na przerębowy na przykładzie jednostki kontrolnej Chełmsko w Nadleśnictwie Kamienna Góra
Conversion to selection type of silvicultural system on the example of Chelmsko control unit in the Kamienna Gora Forest District
Autorzy:
Barzdajn, W.
Kowalkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/989578.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Sudety
jodla pospolita
restytucja gatunku
drzewostany swierkowe
przebudowa drzewostanow
ciecia przerebowe
powierzchnie probne
zmiany skladu gatunkowego
zmiany struktury drzewostanu
Nadlesnictwo Kamienna Gora
abies alba
selection silvicultural system
the sudety mts.
Opis:
The study assesses the effect of applied cuttings on the transformation of the species composition, structure and development of the forest towards selection forest type. The described control unit was established in 2000 in the Krucze Mts. (southern Poland) within the programme of silver fir restoration in the Sudety Mts. The working hypothesis was based on the advantageous effect of the selection management system on fir trees. 46 permanent circular sample plots of 0.05 ha each were established and diameter at breast height measured on all trees along with height of 2−3 trees growing closest to the plot center. Measurements were repeated in 2004 and 2013. The greatest share in the growth increment was recorded for the most numerous species (spruce and fir). Only spruce and beech were important in the group of young trees (recruitment), which did not include fir or larch. The timber resources increased from 339 in 2000 to 381 m³/ha in 2013, which indicates that not whole current increment was harvested. The increase in the growing stock follows the reduction in the number of trees per hectare from 361 to 317. Thus the number of young trees did not compensate for the losses. As a result the investigated unit is not in the state of equilibrium and in the future more work and care should be devoted to the regeneration. Fir turned out to be a species with the greatest production potential. In the first period growing stock of this species amounted to 17%, while the increment was over 26%. In the latter the increment reached 34%. The most important objective of the selection cuttings in this concrete unit should be to tend for regeneration and trees at low diameter sub−classes at the expense of use of trees with target values of diameters at breast height and disturbing the selection cutting structure. It is advisable to increase the share of fir in the structure of analysed unit.
Źródło:
Sylwan; 2016, 160, 05; 388-396
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiana odpornosci drewna sosny pospolitej na dzialanie grzybow powodujacych rozklad brunatny pod wplywem kontaktu z gleba opadoglejowa
Autorzy:
Kundzewicz, A.W.
Witter, W.
Powiązania:
https://bibliotekanauki.pl/articles/818189.pdf
Data publikacji:
1993
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
ochrona drewna
drewno sosnowe
grzyby
biodegradacja
sosna zwyczajna
zgnilizna brunatna drewna
Pinus sylvestris
drewno
Źródło:
Sylwan; 1993, 137, 10; 17-24
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ postępowania ochronnego na występowanie kornika drukarza Ips typographus (L.) w Dolinie Kościeliskiej w Tatrzańskim Parku Narodowym
Effect of forest protection strategy on the occurrence of the spruce bark beetle Ips typographus (L.) in the Koscieliska Valley in the Tatra National Park
Autorzy:
Grodzki, W.
Gąsienica Fronek, W.
Powiązania:
https://bibliotekanauki.pl/articles/986615.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Tatrzanski Park Narodowy
Dolina Koscieliska
obszary ochrony scislej
drzewostany swierkowe
drzewostany uszkodzone
wiatrolomy
szkodniki roslin
kornik drukarz
Ips typographus
wystepowanie
bark beetles
norway spruce
wind damage
outbreaks
nature conservation
Opis:
In the end of 2013 the Norway spruce stands in the Kościelska Valley in the Tatra National Park (S Poland) were severely damaged by the wind. In the next year about 22,000 m3 of timber from broken and fallen trees was processed and removed from the active protection zone, whilst in the strict protection zone those trees were left. In 2014, when the presented survey started, the infestation of lying and surrounding standing trees was very low, but starting from 2015 an intensive bark beetle Ips typographus outbreak affected the survived stands. No−intervention strategy was implemented by the national park in both zones, regardless their formal status at that time as well. In 2015 a set of 10 observation plots (200 trees in total) was established in both active and passive (strict) protection zones (5 plots in each zone). In 2017 a new set of 12 plots (240 trees in total) was installed (6 plots in each zone). On each plot the breast height diameter of all trees was measured and the relative mortality of trees (share of attacked spruces) was recorded each year. The infestation density and sex ratio were defined on the 25×25 cm bark samples taken from 138 trees in 2 trunk sections located 1.5−2.0 above the ground and in the midway between tree and crown bases. The bark beetle attack on living spruces in 2015 differed between the active and strict protection zones. The relative tree mortality was lower in active than in passive protection zone (20 and 39% respectively), but later it gradually came to be similar in both parts of the area (73.3 and 77.5%, respectively in 2017). In the initial outbreak phase, thinner (weaker) trees were attacked, and in the following years – stronger ones, although in the active protection zone the opposite pattern occurred initially. The attack density decreased in subsequent years, being higher in active protection zone, with gradually decreasing difference between zones. Thicker trees were attacked with lower intensity. The share of females, higher in active protection zone (68.2 vs. 63.9%), gradually decreased to (57.9 vs. 51.2%). The initial decrease of bark beetle attack intensity in the active protection zone gradually disappeared after the no−intervention strategy was applied. The resulting extended bark beetle infestation and its increasing intensity in both parts of the area, demonstrate the appropriateness and effectiveness of active protection measures applied in 2014.
Źródło:
Sylwan; 2018, 162, 08; 628-637
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kilka uwag na temat pracy Juliusza Stachego pt. „Zagadnienie surowca drzewnego dla przemysłu celulozowo-papierniczego
Neskol’ko zamechanijj na temu truda Juliusha Stakhy „ Po voprosu lesnogo drevesnogo syr’’ja dlja celljulozno-bumazhnojj promyshlennosti”, napechatannogo v 6 nomere „Syl’vana” 1956 g.
Einige Bemerkungen Uber die Arbeit von Juliusz Stachy bt.: „Probleme des Holzrohstoffes fur Zellulose-Papierindustrie” (veroffentlicht in Nr 6, 1956, Sylwan)
Autorzy:
Chmielewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/811781.pdf
Data publikacji:
1957
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1957, 101, 02
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
150-lecie Wydziału Leśnego w Tharandt
150 years of the Forestry Faculty at Tharandt
150 Jahre Fakultet fur Forstwirtschaft in Tharandt
Autorzy:
Rompler, W.
Powiązania:
https://bibliotekanauki.pl/articles/811965.pdf
Data publikacji:
1966
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1966, 110, 12
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany we florze roślin naczyniowych w borze suchym wywołane wprowadzeniem podszytu
Changes in the flora of vascular plants on dry poor coniferous forest site induced by introduction of underwood
Autorzy:
Faltynowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/812146.pdf
Data publikacji:
1983
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1983, 127, 03
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
O niektórych nazwach ziemi i lasu na równinach
Ob nekotorykh nazvanijakh zemel i lesov na ravninakh
On certain names of lands and forests in lowlands
Autorzy:
Pracki, W.
Powiązania:
https://bibliotekanauki.pl/articles/812229.pdf
Data publikacji:
1976
Wydawca:
Polskie Towarzystwo Leśne
Źródło:
Sylwan; 1976, 120, 10
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 689

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