Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "mixed forests" wg kryterium: Wszystkie pola


Wyświetlanie 1-6 z 6
Tytuł:
Struktura, dynamika i właściwości opadu roślinnego w 110-letnim drzewostanie bukowym z domieszką sosny i świerka
Structure, dynamics and properties of litterfall in a 110-year-old beech stand with admixture of pine and spruce
Autorzy:
Jonczak, J.
Powiązania:
https://bibliotekanauki.pl/articles/973709.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewostany bukowo-sosnowo-swierkowe
dynamika opadu
sklad frakcyjny
leśnictwo
właściwości chemiczne
opad roślinny
skład frakcyjny
drzewostany bukowo-sosnowo-świerkowe
litterfall
nutrient cycling
mixed forests
north-west Poland
Opis:
The aim of this study was to characterise the aboveground litterfall in a 110−year−old beech stand with admixture of pine and spruce based on a 3−year measurement series. The studies were conducted in 2007−2009 in the Leśny Dwór Forest District (NW Poland). The input of litterfall during the study period amounted from 3.234 to 4.871 t/ha/year. Beech, pine and spruce contributed in the total litterfall mass in 50.8−70.1%, 11.4−11.9% and 1.6−24.0% respectively. Beech leaves were the main component of litterfall, accounting for 39.6−52.4%. In the masting year for beech (2009), seed coats and beech seeds had also a significant share in the mass of litterfall. The bark beetle outbreak, which occurred during the study period, influenced the dynamics and properties of spruce needle fall. In the outbreak year (2008), a several fold increase in the mass of needle fall, mainly green needles, from spruce trees was observed. The beech leaf fall compared with other components of the stand was rich in phosphorus, potassium and calcium, and moderately rich in nitrogen, had the lowest C:N and C:P ratios and the highest pH value. The needle fall of pine and spruce was much less rich in nutrients and strongly acidic. It also showed a broad range of C:N and C:P values.
Źródło:
Sylwan; 2011, 155, 11; 760-768
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wnioski z konferencji nt. sposobów zagospodarowania lasów jodłowych i jodłowo-mieszanych na Roztoczu
Vyvody s konferencii na temu otnositelnogo sposobov vedenija khozjajjstva v pikhtovykh i pikhto-smeshennykh lesakh na Roztochu
Conclusions from the conference devoted to methods of management of fir and fir-mixed forests in the Roztocze
Autorzy:
Graniczny, S.
Powiązania:
https://bibliotekanauki.pl/articles/818702.pdf
Data publikacji:
1971
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Roztocze [geogr.]
drzewostany jodlowe
drzewostany bukowe
drzewostany mieszane
drzewostany jodlowo-bukowe
zagospodarowanie lasu
konferencje
wnioski koncowe
Źródło:
Sylwan; 1971, 115, 08
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Konferencja terenowa PTL pt. "Sposoby zagospodarowania lasów jodłowych, bukowych i jodłowo-mieszanych na terenie Roztocza"
Rajjonnaja konferencija PLO: Sposoby vedenija khozjajjstva v pikhtovykh, bukovykh i pikhto-smeshannykh lesakh na territorii Roztocha
Field conference of the Polish Forest Society on "Methods of the management of fir, beech, and fir-mixed forests in the region of Roztocze"
Autorzy:
Gierlinski, T.
Powiązania:
https://bibliotekanauki.pl/articles/820347.pdf
Data publikacji:
1971
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Roztocze [geogr.]
drzewostany jodlowe
drzewostany bukowe
drzewostany jodlowo-bukowe
zagospodarowanie lasu
konferencje
sesje terenowe
sprawozdania
Źródło:
Sylwan; 1971, 115, 08
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktura naturalnego drzewostanu buczyny karpackiej w Tatrach na tle naturalnych buczyn z innych masywów Karpat
Structure of natural stand of a carpathian beech forest in the Tatra mountains compared with natural beech stands from other parts of the Carpathian
Autorzy:
Szwagrzyk, J.
Sułowski, W.
Skrzydłowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/1018691.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
Tatry
Karpaty
lesnictwo
drzewostany naturalne
struktura drzewostanu
buczyna karpacka
canopy stratification
diameter distribution
height distribution
mixed temperate forests
natural stands
Opis:
The aim of this study was to compare the structure of newly found remnant of natural beech forest in Suchy Żleb in the Tatra mountains with the structure of natural tree stands in other parts of the Carpathians. In the sample plot of the size of 1 ha the stand basal area amounted to 36.7 m2; of that, 42.7% was beech, 37.4% silver fir, 19.8% Norway spruce, and 0.1% sycamore maple. In the units of volume silver fir was the most important tree in the stand (47%), while the share of beech was only 33%; the total wood volume of live trees was equal to 446.8 m3/ha. Tree number was equal to 442, among them 327 beeches, 73 silver firs and 41 Norway spruces. Number of snags was 26, and their volume 26.16 m3. Total amount of coarse woody debris was 159 m3 per hectare. Sub−canopy layer was dominated by beech, the middle layer of tree stand was a mixture of all three species, and the highest canopy layer consisted only of spruce and fir. The analyzed stand had biomass accumulation slightly below the average for the natural mixed beech forests of the Carpathians, probably because of selective tree cutting in the past. Because Suchy Żleb is the only remnant of natural stand in the montane zone of the Tatra mountains, it is very valuable as an object for comparisons with natural beech stands growing in other ranges of the Carpathians.
Źródło:
Sylwan; 2006, 150, 09; 3-15
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ konkurencji na przyrost grubości drzew w wyżynnych lasach mieszanych o złożonej budowie
Effect of competition on the diameter growth of trees in mixed upland forests with complex structure
Autorzy:
Śmigielski, A.
Socha, J.
Maciejewski, Z.
Pach, M.
Powiązania:
https://bibliotekanauki.pl/articles/989022.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
Roztoczanski Park Narodowy
drzewostany naturalne
drzewostany mieszane
drzewa lesne
grab
buk
jodla
przyrost drzew
przyrost grubosci
wskazniki konkurencyjnosci
competition indices
natural stands
roztocze national park
Opis:
The aim of this study was to assess the effect of competition on diameter growth of European beech (Fagus sylvatica L.), silver fir (Abies alba Mill.) and European hornbeam (Carpinus betulus L.) in forests with complex structure. For each tree we calculated set of 20 competition indexes in 4 variants for determining the scale of the competitors influence. The use of such a set of indices, allowed to describe accurately the competition between trees in the specific conditions for the particular tree species. Given species belong to the group of shade−tolerant trees. The species composition of the tree stands and their structure are the results of long−lasting natural processes, which is different than in the majority of Polish forests. The empirical material collected in the years 1993 and 2003 in four sample plots of 0.5 ha each located in natural stands of the Roztocze National Park in south−eastern Poland. The relationships between the competition and the growth were analysed using generalized additive models. This method allows to extend of the standard linear model, by taking into account non−linear function of each variable. One of the option of quantifying competition processes is the use of competition indices. The competition situation of an individual tree was described using distance−independ and distance−depend indices. Each of analysed species reacts differently on competition. Among the three analyzed species, the best competition index CI15 explained 48.3% of the variation diameter growth of European beech (tab. 2). The competition index CI3 explained only 26.1% of the variation diameter growth of European hornbeam (tab. 2). It turned out to be the worst result for the described species. The competition index CI14 explained 31.1% of the variation diameter growth of silver fir (tab. 2). Additional use of DBH in the models, increased values of the coefficient of determination, and extended the possibilities to use the developed models.
Źródło:
Sylwan; 2017, 161, 05; 365-378
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmiany roślinności wschodniokarpackiego podgórskiego lasu mieszanego w warunkach ograniczonej gospodarki leśnej rezerwatu „Góra Sobień”
Vegetation changes in East Carpathians piedmont mixed forest under restricted forest management in 'Gora Sobien' nature reserve
Autorzy:
Durak, T.
Powiązania:
https://bibliotekanauki.pl/articles/1011968.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
zmiany skladu gatunkowego
rezerwat Gora Sobien
wskaznik Ellenberga
rezerwaty przyrody
lesnictwo
lasy mieszane
zwarcie drzewostanu
„góra sobień” nature reserve
deciduous forests
change
regeneration
land use
eastern carpathians
Opis:
In this study, the presence of changes leading towards renaturalization of the fertile deciduous forests has been established. An increase in the proportion of deciduous tree species and herbaceous species from clearings or forest margins also has been noted. The main direction of changes involved increase in humidity, trophic properties and reaction of soil. Improvement in properties of the ground forest, which is associated with an increase in dead organic matter counteracting the negative effect of beech leafs is the main cause of the changes. Ongoing processes should lead to an increase in the tree and undergrowth biodiversity, at the same time causing a decrease in spatial heterogeneity of the deciduous piedmont forest.
Źródło:
Sylwan; 2009, 153, 09; 627-634
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies