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    Wyświetlanie 1-9 z 9
    Tytuł:
    Wpływ redukcji konkurencji brzozy brodawkowatej na wzrost dębu bezszypułkowego w fazie młodnika
    Effect of reducing silver birch competition on growth of sessile oak during the thicket stage
    Autorzy:
    Andrzejczyk, T.
    Milewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/985742.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewostany mieszane
    brzoza brodawkowata
    Betula pendula
    konkurencyjnosc
    mlodniki
    dab bezszypulkowy
    Quercus petraea
    wzrost roslin
    betula pendula
    interspecific competition
    mixed−stand
    quercus
    stand treatment
    Opis:
    Naturally regenerated silver birch is one of the most abundant competitor for planted seedlings in central Poland. The effect of the interaction between planted oak seedlings and naturally regenerated birch was studied in 14−17−years−old sessile oak stand. The experiment was established at stand age of 14−years. At that time, there were around 4000 oaks and 10000 birches per hectare. A sample of dominant individuals of oak were selected and one of three treatments were applied to each individual. The treatments included: (i) removal of all naturally regenerated trees in a radius of 1 m (W1), (ii) removal of all naturally regenerated trees in a radius of 2 m (W2) and (iii) untreated control (K). Breast height diameter and height of selected oaks were measured during three years following the experiment establishment. The release of competition resulted in greater diameter and height growth. The diameter growth was increasing with an increment of free space from oak and was the greatest in the W2 treatment. The increment of height growth was similar regardless of the treatment radius. In practical forestry, silver birch can be recommended as admixture in pure oak stands with low survival rate as replacement for dead oaks. However, a minimum distance of 2 m between oak and birch should be kept.
    Źródło:
    Sylwan; 2019, 163, 06; 452-459
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The dynamics and structure of dead wood in natural spruce-beech forest stand - a 40 year case study in the Krkonose National Park
    Autorzy:
    Vacek, S.
    Vacek, Z.
    Bilek, L.
    Hejcmanova, P.
    Sticha, V.
    Remes, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/41560.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    forest
    natural forest
    mixed stand
    dynamics
    structure
    dead wood
    spruce-beech forest
    European beech
    Fagus sylvatica
    Norway spruce
    Picea abies
    Czech Republic
    Karkonosze National Park
    Opis:
    The study deals with long-term dynamics of snags and fallen dead wood from 1970 to 2010 in an unmanaged forest ecosystem dominated by European beech in the Bažinky area, Krkonoše National Park (Czech Republic). The volume of dead wood was estimated from 1970 separately for fallen dead wood (logs) and standing dead wood (snags and stumps). Total dead wood volume on permanent research plot (PRP) 6 increased from 41.9 to 241.6 m3 ha–1 and on PRP 7 from 27.7 to 170.0 m3 ha–1. During 40 year case study the mean total volume of fallen dead wood was 193.3 m3 ha–1 (± 29.8 S.E.) and 96.2 m3 ha–1 (± 19.4 S.E.) and the mean total volume of standing dead wood was 17.4 m3 ha–1 (± 3.4 S.E.) and 12.6 m3 ha–1(± 1.4 S.E.) on PRP 6 and PRP 7, respectively. Comparing tree species, the mean volume of fallen dead wood was significantly higher for Norway spruce than for beech in the decomposition class 1 (F(1, 14) = 5.7, P = 0.03) and significantly higher for beech in the decomposition classes 4 (F(1, 14) = 20.4, P < 0.001) and 5 (F(1, 14) = 25.5, P < 0.001). Dead wood was distributed from randomly to aggregated spatial pattern. Despite the rapid decay of beech wood, the amounts of deadwood are likely to increase further during the next decades with continuing disintegration of the forest stand.
    Źródło:
    Dendrobiology; 2015, 73
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przemiany dolnoreglowych drzewostanów świerkowych poddanych ochronie częściowej w Tatrzańskim Parku Narodowym
    Changes of spruce stands in the lower mountain forest belt subjected to active protection in the Tatra National Park
    Autorzy:
    Holeksa, J.
    Greiert, J.
    Krzan, Z.
    Olszowska, B.
    Skawiński, P.
    Wika, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1035869.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    renaturalizacja
    Tatrzanski Park Narodowy
    ochrona czesciowa
    drzewostany swierkowe
    przebudowa drzewostanow
    parki narodowe
    lesnictwo
    struktura drzewostanu
    regiel dolny
    national park
    active protection
    mixed stand restoration
    picea abies monocultures
    Opis:
    One of the most important objective of the active nature protection in national parks situated in Polish mountains is the restoration of mixed stands replaced by Norway spruce monocultures. Seven spruce stands situated in the Tatra National Park were measured in 1983−1986 and in 2001. The density of all stands decreased whereas the basal area and volume increased. In some of them the changes were considerable. The contribution of Fagus sylvatica and Abies alba, two most important tree species in natural mountain forests, changed only slightly and even decreased in three stands. Intensity of elimination of trees was related to their thickness – thin trees were removed from stands more often. Due to this way of thinning the variation of tree thickness diminished in all spruce stands. The densities of Fagus sylvatica and Acer pseudoplatanus saplings increased in all stands as a result of former planting. However, they are still to low for effective restoration of mixed stands. It can be concluded that mainly sanitary cuttings have been used recently in all stands. This line of management is not deliberately focused on the restoration of mixed stands and the diversification of their structure. It results in aging of dense spruce stands and increases the risk of future large−area disturbances due to strong winds and insect outbreaks.
    Źródło:
    Sylwan; 2003, 147, 10; 37-46
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ ogłowienia i przerzedzenia na wzrost grabu (Carpinus betulus L.) w młodniku dębowym (Quercus petraea (Matt.) Liebl.)
    Influence of decapitating and thinning on growth of hornbeam (Carpinus betulus L.) in the oak (Quercus petraea (Matt.) Liebl.) thicket
    Autorzy:
    Andrzejczyk, T.
    Brzeziecki, B.
    Szeligowski, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/979514.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewostany mieszane
    drzewostany grabowo-debowe
    mlodniki
    grab pospolity
    Carpinus betulus
    zabiegi pielegnacyjne
    przerzedzanie
    oglawianie
    wzrost roslin
    przyrost wysokosci
    przyrost piersnicy
    interspecific competition
    pre−commercial thinning
    decapitating
    mixed stand
    Opis:
    The aim of this study was to quantify 4−year growth and increment of 11− to 15−year−old, artificially regenerated hornbeam (Carpinus betulus L.) playing the role of the tending (nursery) species in the oak stand of the same age, after the silvicultural treatments aimed at reducing its competition against the oak. The study included three types of experimental treatments: decapitating of all hornbeam trees (OG), schematic reduction of hornbeam density (R50, removal of every second hornbeam in a row) and control (K, without treatment). The trial stand is located in Rogów (51.827023° N, 19.922315° E) and was established in 2004 on a moderately fertile site. The experiment was carried out in the spring 2013 (9 years after planting). Height and breast height diameter (dbh) of trees were measured every two years. During the study period, the height increment of decapitated trees was significantly larger than in R50 and K variants, while the dbh increment of trees in R50 variant was significantly larger than in K and OG variants. The height increment of hornbeam in R50 and OG variant and the dbh increment in R50 variant were positively correlated with height and diameter of trees before the treatment, while the dbh increment after decapitating was negatively correlated with tree dimensions before treatment. The decapitating treatment reduced the competitive ability of hornbeam more effectively than the schematic thinning removing 50% of hornbeam trees. After 4 years in the first case, oaks were on average 1 m higher than hornbeams, and in the second case, there was an opposite situation. In order to improve the effectiveness of the thinning treatment, a selective cutting should be performed (removal of the largest hornbeams), and in order to slow down the regeneration of hornbeams after decapitating, the treatment should be carried out during the top of the growing season.
    Źródło:
    Sylwan; 2019, 163, 03; 179-187
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przyrost miąższości drzewostanów mieszanych i litych: wyniki z wybranych stałych powierzchni badawczych w Europie Środkowej
    Volume growth of mixed-species versus pure stands: results from selected long-term experimental plots in Central Europe
    Autorzy:
    Bilak, K.
    Dudzińska, M.
    Pretzsch, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/989685.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany lite
    drzewostany mieszane
    drzewostany swierkowo-bukowe
    drzewostany debowo-bukowe
    stale powierzchnie obserwacyjne
    stopien zmieszania drzew
    przyrost miazszosci
    european beech
    norway spruce
    sessile and pedunculate oak
    mixed stand
    pure stand
    facilitation
    competition
    overyielding
    underyielding
    close−to−nature silviculture
    Opis:
    This paper addresses the question of whether or not and to which extent two common tree species mixtures (Norway spruce – European beech; sessile and pedunculate oak – European beech) vary in volume growth from their monocultures. To this end, the results from selected long−term experimental plots located in Germany, Poland and Switzerland, with many of them under survey since the 1890's, were employed. We found than on average both type of mixtures exceeded volume growth in pure stands by almost 30%. The analysis at the species level showed than only a Norway spruce response to mixture was neutral on average, while other tree species were benefitted by mixture. An empirical derived model for mixed stand of oak and European beech disclosed that the interaction can range from facilitation and overyielding on poor sites, through the neutral response under mesotrophic conditions, up to underyielding on fertile sites triggered by competition.
    Źródło:
    Sylwan; 2015, 159, 01; 22-35
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ grabu (Carpinus betulus L.) na wzrost i przeżywalność dębu (Quercus robur L.) w fazie młodnika
    Effect of hornbeam (Carpinus betulus L.) on growth and survival of pedunculate oak (Quercus robur L.) during the thicket stage
    Autorzy:
    Andrzejczyk, T.
    Brzeziecki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/985865.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewostany mieszane
    mlodniki
    drzewa lesne
    grab pospolity
    Carpinus betulus
    oddzialywanie na rosliny
    dab szypulkowy
    Quercus robur
    wzrost roslin
    przyrost wysokosci
    przyrost piersnicy
    artificial regeneration
    carpinus
    interspecific competition
    mixing form
    mixed−stand
    quercus
    silviculture
    Opis:
    Growth and mortality of oak (Quercus robur L.) in young mixed stands with various admixture of hornbeam (Carpinus betulus L.) in the period of 9−13 years after planting were examined. The trial stand is located in central Poland (51.827023° N, 19.922315° E). It was established in 2004 on a moderately fertile site. Four experimental variants with different participation of oak (O) and hornbeam (H) were established: W1 – an oak monoculture (control variant, 100% O), W2 – a mixed stand consisting of two rows of oak and one row of hornbeam (67% O, 33% H), W3 – a mixed stand consisting of one row of oak and one row of hornbeam (50% O, 50% H), W4 – a mixed stand characterized by a single tree mixture, with three oaks and one hornbeam alternately occurring in each row (75% O, 25% H). During the first two years of the study period the height increments of oak trees were significantly larger in the study variants with hornbeam (the biggest in W3 variant), while during the next two years, the largest values of height increments occurred in the control variant (W1). Through the second part of the study period, the most pronounced, negative effect of hornbeam on the dbh increment of oak trees took place in the W3 variant. During the first nine years after planting the survival rate of oak trees in the variants with hornbeam were similar (82−94%) as in the control variant (85%). However, during the next four years, three times more oaks died in W3 variant (16,5%) than in other variants (5−7%). In general, the results obtained suggest that in order to create mixed oak stands with hornbeam as a nursery species, the share of hornbeam should not exceed 20−25% of all planted trees. The above value appears to be acceptable from the point of view of the negative competitive effects of hornbeam on oak trees during the initial stages of stand development.
    Źródło:
    Sylwan; 2018, 162, 12; 989-997
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution and natural regeneration of Tilia cordata Mill. in Ukrainian plain forests in a changing climate
    Autorzy:
    Rumiantsev, Maksym
    Luk'yanets, Volodymyr
    Kobets, Oleksii
    Obolonyk, Iryna
    Tarnopilska, Oksana
    Pozniakova, Svitlana
    Musienko, Sergiy
    Tupchii, Olha
    Powiązania:
    https://bibliotekanauki.pl/articles/2041224.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    advance growth
    associated species
    mixed stands
    productivity
    stand origin
    Opis:
    The aim of this study was to assess the current state of small-leaved lime stands under climate change, as well as to identify optimal conditions for the occurrence and further growth of natural lime regeneration under the stand canopy to grow productive and sustainable mixed stands. The areas of small-leaved lime (Tilia cordata Mill.) stands in plain Ukrainian forests and mixed stands with English oak (Quercus robur L.) were defined according to reference materials (as of 2016). Growth and liveability peculiarities of natural regeneration of lime under the canopy of oak-lime stands in climate change were identified. The main stand characteristics contributing to maximal appearance and further development of advance growth of lime, such as composition, age and relative density of stocking, were determined. It was found that the lime stands of vegetative origin occupy the largest part of the lime forests’ area, being less resilient and productive than those originated from seeds. Small-leaved lime is the best associated species in mixed oak stands. The presence of lime improves health, assortment composition, and productivity of oak stands and increases their resistance against pests and diseases. In the future, lime can play an important role in the adaptation of forests to climate change due to its biological and forest properties and adaptability to a sustainable existence in a relatively wide range of environmental conditions. A summary of the studies complements a system of knowledge about the current state of lime stands as well as peculiarities of their regeneration and growth. The data obtained can be used as a theoretical base for forest management to promote natural regeneration and maintain the sustainability of these forests.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 2; 125-137
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza zmian stanów wód gruntowych po wycięciu drzewostanu w siedlisku lasu mieszanego wilgotnego na przykładzie Leśnictwa Laski
    Analysis of Ground-Water Level Changes after Cutting Down a Forest Stand in Moist Mixed Broadleaved Forest Habitat on the Example of Laski Forestry
    Autorzy:
    Korytowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1819020.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    wody gruntowe
    drzewostan
    las mieszany
    groundwater
    stand
    mixed forest
    Opis:
    The paper presents the results of researches carried on averages about precipitation sums, 2003/2004 (before cutting) and 2006/2007 (after cutting) hydrological years in catchment of pond No 5 located in Laski forestry. Discussing forestry is situated at Siemianice Experimental Forest Farm of Poznań University of Life Sciences located about 15 km south-east from Kępno. The forests of this forestry are within range of Nizina Południowo-Wielkopolska, on Wysoczyzna Wieruszowska, which is differential morainic plain, cut with the river Prosna headwaters. Area of the pond’s catchement is about 20 ha and it’s an afforested catchment, with predominance of fresh habitats, in smallest step in area adjacent to pond No 5 occurrence moist broadleaved forest and moist mixed broadleaved forest. Predominant species of tree stand in analyzing catchment there is pine about 100 years. In the soil cover the largest area is dear brown soil, and the most common type of soil is loamy sand. From february to october 2006 carried on analyzed catchment cutting forest stand, which included habitats moist broadleaved forest, moist mixed broadleaved forest and partially fresh broadleaved forest. To analysing choose wells No 1.1 and 1.2 which were situated at cutting area. The researches carried out confirmed, that ground-water levels shows some cycle and depend of meteorological conditions. Maximal levels occurred at the end of winter researches half-year. Whereas minimal ground-water levels, causes higher air temperature and influence with them transpiration forest stands, were in analyzing habitat at the end of summer half-year. The researches indicated also, that without meteorological conditions, large influence at form ground-water level (increase) in afforested catchments, particularly in moist habitats, have carried cuttings. Carried out researches indicated that execute cutting at area analysis habitat moist mixed broadleaved forest causes increase ground-water levels. Ground-water level at cutting area in 2006/2007 hydrological year was closer to land surface, average about 61 cm.
    Źródło:
    Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1274-1286
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The stand structure and natural regeneration of Abies alba Mill. in reserves on the northern margin of its distribution in SW Poland
    Autorzy:
    Szymura, T H
    Powiązania:
    https://bibliotekanauki.pl/articles/41400.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    stand structure
    natural regeneration
    Abies alba
    silver fir
    Wal Trzebnicki area
    distribution
    seedling density
    stand type
    Abietetum polonicum
    mixed forest
    population structure
    safe site
    Polska
    Opis:
    The silver fir (Abies alba Mill.) in the area of Wał Trzebnicki is at the northern limit of its distribution in western Poland. This study was performed in three nature reserves with protected silver fir populations. The stands in these reserves were mixed, with complex spatial structure and abundant tree regeneration. The proportion of fir in stands was around 16% of DBHS, the age of trees reached around 130 years. The silver fir occurs mainly in the sapling stage, whereas the number of seedlings was very low. The results of this study show the influence of forest floor vegetation as well as litter type on the emergence of fir seedlings. The seedlings density was compared with the results of other studies from different geographical areas and stands type in Poland.
    Źródło:
    Dendrobiology; 2007, 57; 55-62
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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