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    Wyświetlanie 1-11 z 11
    Tytuł:
    Reakcja przyrostowa drzewostanów bukowych w Nadleśnictwie Cewice na zabiegi hodowlane
    Increment reaction of European beech stands in the Cewice Forest Districts on silvicultural treatments
    Autorzy:
    Bijak, S.
    Madrzak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/881393.pdf
    Data publikacji:
    2016
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
    Tematy:
    drzewostany bukowe
    zabiegi hodowlane
    ciecie drzew
    drzewa lesne
    buk zwyczajny
    Fagus sylvatica
    reakcje przyrostowe
    przyrosty radialne
    Nadlesnictwo Cewice
    Źródło:
    Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2016, 18, 3[48]
    1509-1414
    Pojawia się w:
    Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reakcja przyrostowa jodły (Abies alba Mill.) na zmiany środowiska w powiązaniu z koroną wtórną
    Increment response of silver fir (Abies alba Mill.) to environmental conditions in relation to secondary crown
    Autorzy:
    Dmyterko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/990030.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    zmiany srodowiska
    reakcje roslin
    reakcje przyrostowe
    jodla pospolita
    Abies alba
    korony wtorne
    secondary crown
    increment response
    silver fir
    poland
    Opis:
    The study concerns the secondary sunny crown of silver fir trees, its length and density as well as the relationship between the length of primary and secondary crown between the radial increment and secondary crown characteristics. It also discusses the importance of secondary crown in the life and population growth of silver fir.
    Źródło:
    Sylwan; 2014, 158, 02; 90-98
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przyczyny krótkookresowych reakcji przyrostowych sosen z różnych siedlisk
    Causes of the short-term incremental reactions of Scots pine growing at different sites
    Autorzy:
    Wilczyński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/993422.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    dendroklimatologia
    przyrosty radialne
    reakcje przyrostowe
    czynniki meteorologiczne
    tree−ring
    dendroclimatology
    scots pine
    forest site type
    Opis:
    In homogeneous climate conditions Scots pine trees at different sites have similar short−term incremental rhythm. It was determined by the temperature of early spring and precipitation in June. Differences in the growth pattern are caused by various sensitivities of pines from different habitats to the temperature in May and precipitation in February and April of the current year.
    Źródło:
    Sylwan; 2013, 157, 09; 662-670
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ trzebieży na przyrost radialny dębu w Nadleśnictwie Międzyrzec
    Effect of thinning on radial increment of oak in Miedzyrzec Forest District
    Autorzy:
    Sacewicz, W.
    Bijak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/985716.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    dab
    Quercus
    reakcje przyrostowe
    przyrosty radialne
    zabiegi hodowlane
    trzebieze
    Nadlesnictwo Miedzyrzec
    quercus sp.
    tree−ring analysis
    silvicultural treatment
    increment response
    Opis:
    The intermediate cuttings have an important impact on the stand structure and productivity. Choosing the right method of the treatment performance is the decision, which is fundamental in shaping tree stands stability. The radial increment, apart from the natural growth potential of particular species, is influenced by many abiotic, biotic and anthropogenic factors, among which one can distinguish those that influence it directly, e.g. thinning. The study objective was to determine the effect of silvicultural treatments on the increment reaction of oak (Quercus sp.) stands in the Międzyrzec Forest District (eastern Poland). The empirical material was collected in six forest stands located in the Witoroż forest range. In each stand we cored 10 dominant and co−dominant trees (representing 1st and 2nd Kraft’s biosocial classes). After the measurements of the tree−ring widths and the synchronization of incremental series, the raw and standard chronologies were elaborated for each stand. In total, we analysed 8 treatments: six early and one late selection thinnings, and one late salvage thinning (tab. 1). For each treatment, three− and five−years’ value of mean tree−ring width was calculated for the period before and after the cut. Additionally, we calculated the incremental response parameters: recovery (Rc), resilience (Rs) and resistance (Rt) indices. For the majority of the analysed treatments, the cuts resulted in an increase in average tree−ring width both in the 3−, and 5−years perspective. However, statistically significant changes in this parameter occurred only in a few cases (fig. 2). The average values of incremental response indicators show that the investigated oak stands are characterized by a significant adaptive capacity and a rapid recovery of incremental capacity in the analysed time spans. At the same time, the low values of Rt index suggest that their growth resistance to disturbance caused by the thinning is rather low. The age of the stand at the time of the treatment significantly affected the incremental response parameters of the examined oaks. The older the stand, the incremental response was less intense.
    Źródło:
    Sylwan; 2019, 163, 08; 645-654
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sygnał klimatyczny w słojach Picea sitchensis (Bong.) Carriere oraz Pseudotsuga menziesii (Mirb.) Franco
    Climatic signal in tree-rings of Picea sitchensis [Bong.] Carr. and Pseudotsuga menziesii [Mirb.] Franco
    Autorzy:
    Feliksik, E.
    Wilczyński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1015609.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Pseudotsuga menziesii
    sloje przyrostu rocznego
    daglezja zielona
    swierk sitkajski
    lesnictwo
    dendroekologia
    Picea sitchensis
    reakcje przyrostowe
    dendroklimatologia
    drzewa lesne
    pseudotsuga menziesii
    picea sitchensis
    dendroclimatology
    dendroecology
    tree−ring
    Opis:
    Paper presents the results of dendroclimatological investigation on over−centennial populations of Douglas fir and Sitka spruce growing in Polish part of the Baltic Sea shore.
    Źródło:
    Sylwan; 2008, 152, 06; 3-13
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopień uszkodzenia drzewostanów świerkowych Gór Sowich
    Damage to spruce stands in the Sowie Mountains
    Autorzy:
    Dmyterko, E.
    Kluziński, L.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/990883.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Gory Sowie
    drzewostany swierkowe
    uszkodzenia drzewostanow
    swierk pospolity
    Picea abies
    uszkodzenia drzew
    korony drzew
    reakcje przyrostowe
    warunki srodowiska
    degree of damage
    growth response
    picea abies
    poland
    Opis:
    The aim of the research was to assess the degree of damage to spruce trees and stands and to study their growth responses to the changing environmental conditions in the Sowie Mountains (Central Sudety Mts.). To assess the degree of damage to trees, three methods based on crown characteristics were used. The types of growth responses of trees to changing environmental conditions were additionally taken into account in one of the methods. Regardless of the assessment method, spruce stands in the Sowie Mountains demonstrated a high level of damage. The poorest growth conditions were found in the period 1966−1980 when a large number of trees showed negative growth responses, indicating a decrease in radial increment. The period 1996−2010 showed an improvement in the growth conditions of trees because the proportion of trees with negative growth responses decreased, while the proportion of trees with positive growth responses increased. It was also found that the growth conditions for spruce were more favourable in the lower montane forest zone (above 600 m a.s.l.), and less favourable at the foothills (below 600 m a.s.l.), which may be caused by the competition of beech replacing spruce in the lower locations in the mountains.
    Źródło:
    Sylwan; 2014, 158, 03; 173-182
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopień uszkodzenia drzewostanów jodłowych Beskidu Niskiego
    Degree of damage to silver fir stands in the Beskid Niski Mts.
    Autorzy:
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989946.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany jodlowe
    uszkodzenia drzewostanow
    jodla pospolita
    Abies alba
    uszkodzenia drzew
    korony drzew
    reakcje przyrostowe
    warunki srodowiska
    radial increment
    environmental changes
    primary crown
    secondary crown
    abies alba
    Opis:
    The main aim of the research was to study trees growth responses to the changing environmental conditions and to assess the degree of damage to trees taking into consideration their secondary crown. Based the material from plots established in 12 silver fir stands (tab.), chronologies were developed for trees in various age classes (fig. 1). 1950 saw a downward trend in the radial growth that continued till 1985, to be followed by an upturn lasting till 2000, when the radial growth stabilised. No significant changes in tree−growth were observed in the group of the youngest trees. Three types of growth response to environmental changes (positive, neutral and negative) were distinguished in the last three 15−year−long periods. In years 1970−1984 the largest proportion of firs indicated negative growth responses, while firs with positive response dominated in the period 2000−2014 (fig. 2). The period 1970−2014 saw a steady increase in the mean value of growth responses. The assessment of the top−crown growth (feature B) showed that more than 50% of the trees showed inhibited growth (fig. 3). The assessment of tree vitality (feature C) confirmed the dominance of trees with moderate crown vitality. The vitality of the secondary crowns (Zw) situated below the primary crowns (Zp) of firs was assessed on the basis of crown density and its length (formula [1]). Incorporating Zw in the assessment of tree damage (formula [2]) resulted in an increase in the vitality of the whole crown (Z) (fig. 4). Based on the defoliation, 73% of trees were found to be within damage class 2 (fig. 5). Another method of damage to trees determination was adopted (formula [3]) to assess the damage to fir stands and showed that the largest proportion of trees was with moderate damage (fig. 6). The damage index values obtained with this method were lower compared to the method that considers the defoliation exclusively. Even lower index values were obtained while using the method based on both damage index W and tree−growth response. Of the three discussed damage assessment methods, the most accurate is the method based on damage index Wz, taking into account the growth response of the entire crown (Z).
    Źródło:
    Sylwan; 2015, 159, 11; 893-904
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Klimatyczne przyczyny krótkookresowych reakcji przyrostowych jodły pospolitej z pogórza oraz regla dolnego
    Climatic drivers of short-term increment reactions of silver fir in the foothills and the lower montane forest zone
    Autorzy:
    Wilczyński, S.
    Szymański, N.
    Kołbut, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/989846.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    jodla pospolita
    Abies alba
    dendroklimatologia
    przyrosty radialne
    reakcje przyrostowe
    czynniki klimatyczne
    pogorze
    regiel dolny
    Nadlesnictwo Ustron
    dendroclimatology
    radial increment
    abies alba
    the beskid śląski mountains
    Opis:
    The aim of this study was to i) determine similarities and differences in the increment reaction of silver firs growing at different elevation, ii) identify climatic factors, which caused these response, and iii) determine dendroclimatic zones and identify a site, where a tree grew on the basis of tree−ring widths series. Studied stands were located in the Ustroń Forest District at the elevation of: 500−550 m a.s.l. (foothill zone, 18°59‵ E, 49°43‵ N) and 800−850 m a.s.l. (lower montane forest zone, 18°58‵ E, 49°43‵ N). In each stand 20 dominant firs were selected and one increment core per tree was taken. Tree−ring widths (fig. 1) were transformed into annual sensitivity index (fig. 2). Principal component analysis was used to reduce a number of original variables and classify the tree−ring series. Response function analysis was used to determine climate−radial increment relationships. The standardized series of firs on both sites were different in terms of the climate influence (fig. 3). The analysed trees responded differently to solar and thermal conditions in previous autumn and current summer as well as to pluvial conditions at the beginning of winter and in the second half of summer. The investigated firs had also common increment characteristics. The trees from both sites responded similarly to thermal, solar and pluvial conditions in February, solar and pluvial conditions in May and temperature in winter and summer (fig. 4). Climatic signal of each elevation zone was recorded by each tree and depended on the climatic conditions in given area. On the basis of standardized tree−ring series, dendroclimatic regionalization can be created and the stand, where a tree grew, can be identified.
    Źródło:
    Sylwan; 2015, 159, 05; 372-380
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Krótkookresowe reakcje przyrostowe jodły, świerka i sosny rosnących w jednorodnych warunkach siedliskowych
    Short-term incremental response of silver fir, Norway spruce and Scots pine growing in uniform habitat conditions
    Autorzy:
    Wilczyński, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/991702.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    dendroklimatologia
    drzewa lesne
    jodla pospolita
    Abies alba
    swierk pospolity
    Picea abies
    sosna zwyczajna
    Pinus sylvestris
    przyrosty radialne
    reakcje przyrostowe
    dendroclimatology
    abies alba
    picea abies
    pinus sylvestris
    tree−ring
    central poland
    Opis:
    Study was performed in multi−species stand located in the Świętokrzyski National Park (central Poland). Silver fir, Norway spruce and Scots pine trees that grew in a uniform habitat conditions were selected. The trees showed the differences and similarities of changes of the size of radial increment, which result from species−specific sensitivity to selected meteorological elements.
    Źródło:
    Sylwan; 2013, 157, 06; 442-452
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stopień uszkodzenia drzewostanów bukowych Ziemi Kłodzkiej
    Degree of damage to beech stands in the Klodzko Region
    Autorzy:
    Dmyterko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/989030.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Ziemia Klodzka
    drzewostany bukowe
    uszkodzenia drzewostanow
    defoliacja
    witalnosc
    syntetyczny wskaznik uszkodzenia
    stopien uszkodzenia
    drzewa lesne
    buk zwyczajny
    Fagus sylvatica
    uszkodzenia drzew
    reakcje przyrostowe
    przyrost piersnicy
    fagus sylvatica
    damage to trees
    Opis:
    The study presents the assessment of damage to beech stands using four methods, including that taking into account the radial increment. The condition of stands in 2016, and the growth response of trees to the environmental changes since 1956 are described. The measurements and observations were carried out on 18 sample plots (tab. 1) located in south−western Poland. The mean defoliation accounts for 32.5% ranging from 16.9 to 56.9%, while the average defoliation class value is 1.62 ranging from 0.75 to 2.38. The proportion of trees was found to be the highest (approx. 60%) in class of moderate damage (fig. 1a). The mean value of vitality is 1.17 (ranging from 0.75 to 2.38). The proportion of trees in vitality classes differs significantly from that in defoliation classes. The highest number of trees (approx. 80%) was found to be within damage class of weakened trees (fig. 1b). The assessment of damage to trees based on synthetic damage index (defoliation and vitality combined using formula [1]) is similar to the assessment method based on tree vitality. The mean value is 1.07, ranging from 0.63 to 1.70. The largest proportion of trees (over 80%) was found to be within class 1 (fig. 1c). The index SynZ combines defoliation and vitality, as well as the growth response of trees over the last 15 years according to formula [2]. Its values range from 0.82 to 1.79 with 1.21 on average. The largest proportion of trees (over 70%) was found to be within damage class 1 (fig. 1d). The response of trees to environmental changes is an important indicator of the growth conditions. The proportion of trees with negative growth responses increases from period to period, while the proportion of trees with neutral and positive responses decreases (fig. 2). The analysed beech stands show fairly large differences in the level of the damage. The most likely cause of this situation are droughts occurring in recent growing seasons, especially in 2012. Of the methods deployed to assess damage to beech trees, the morphological−growth one is the most accurate, but the most laborious. Therefore, it is preferable to use a synthetic damage index as both tree defoliation and vitality can also be assessed outside the growing season.
    Źródło:
    Sylwan; 2017, 161, 05; 430-439
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie metod dendrochronologicznych oraz spektrometrycznych w monitorowaniu drzewostanów sosnowych na obszarach przemysłowych
    Application of dendrochronology and mass spectrometry in bio-monitoring of Scots pine stands in industrial areas
    Autorzy:
    Sensuła, B.M.
    Wilczyński, S.
    Piotrowska, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/989354.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    tereny przemyslowe
    zanieczyszczenia przemyslowe
    oddzialywanie na rosliny
    reakcje przyrostowe
    monitoring
    metody badan
    drzewostany sosnowe
    sosna zwyczajna
    Pinus sylvestris
    przyrost drzew
    analiza dendrochronologiczna
    analiza izotopowa
    scots pine
    bio−monitoring
    tree−ring
    isotopes
    pollution
    łaziska górne power plant
    Opis:
    The main aim of this study was to analyze the variability of width as well as content of stable oxygen and carbon isotopes, and radiocarbon in Pinus sylvestris L. tree rings. Analysed Scots pine stand grew on the fresh mixed coniferous forest habitat type on site located in the vicinity of the power plant in Łaziska Górne (southern Poland). The combined usage of tree ring width and isotopic data allowed to identify how investigated trees have adapted to the pollution. Strong increase of industrial pollution emission was noted on the investigated site between 1960s and 1980s. During that time, the trees reduced their radial incement and the heterogeneity of their reaction increased, whereas their sensitivity to short−term impulses to changes in the environment conditions weakened. We observed depletion rates of 14C and δ13C concentration in α−cellulose related to the CO2 emission into the atmosphere in the processes associated with the fossil fuels combustion. Prior to 2000, a decrease in stomatal conductivity was associated with a minor changes in the net photosynthesis rate and that elevated CO2 increased intrinsic water use efficiency (approximately by 40%).
    Źródło:
    Sylwan; 2016, 160, 09; 730-740
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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