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    Wyświetlanie 1-11 z 11
    Tytuł:
    Zasięg i dynamika rozprzestrzeniania się zgnilizny wewnątrz pni jodeł w wyniku ich spałowania przez jeleniowate
    Autorzy:
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022649.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    jodla pospolita
    uszkodzenia drzew
    zgnilizna drewna
    Abies alba
    lesnictwo
    rozprzestrzenianie sie chorob
    spalowanie
    drzewa lesne
    abies alba
    bark stripping
    damage
    decay spread
    spreading rate
    vitality
    Opis:
    The paper presents research results on the extent and rate of horizontal and vertical infection spread process inside fir stems as a result of bark stripping by game and factors determining infection development. The material collected in the stands of the Forest Experimental Station in Krynica (Beskid Sądecki) allows to state that the infection affected exclusively those tree rings which had been formed before wounding. The radial spread of the infection was on average 17% of the cross−sectional area of the stem at a height of the wound centre, and the axial spread was maximally up to 3 m above the ground level. The average rate of horizontal spread of decay inward the stem was 2% of the cross−sectional area per year and that of the movement of decay fungi up and down the tree – 4.7 cm per year. The most important factors affecting infection development inside the stem were: the per cent of wound closure, age and wound size, as well as tree dimensions at the time of bark stripping. The higher degree of decay significantly lowered the index value of the growth predisposition and vitality of damaged young firs.
    Źródło:
    Sylwan; 2005, 149, 05; 23-35
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelowanie przyrostu pierśnicowego pola przekroju jodeł w drzewostanach rębnych
    Modelling the basal area increment in mature silver fir stands
    Autorzy:
    Skrzyszewski, J.
    Pach, M.
    Krzysztof, R.
    Szafroń, M.
    Stenka, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/989097.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany jodlowe
    drzewostany rebne
    jodla pospolita
    Abies alba
    przyrost drzew
    przyrost piersnicowego pola przekroju
    modelowanie
    abies alba
    diameter increment
    tending
    silviculture
    mixed model
    Opis:
    Because of the very long regeneration period, final cuts in silver fir stands are always accompanied by the growing stock maintenance, which aims to maximize the revenue by increasing the share of harvest, trees with the highest timber value. We remove trees that have reached the maximum value and leave those whose value is still increasing. The remaining trees are the more valuable, the faster their value grows. The increase of a tree diameter is one of the factors that determines the value increment. The mature silver fir stand consists of trees that in youth grew in favourable light conditions and those that survived the long period of shade, achieving small dimensions. In such stands, the adjacent trees may vary greatly in diameter not related to their age. The aim of the study was to create a model describing the relationship between the increment of silver fir basal area (BAI) and the stand morphological features, age, and the dynamics of growth in early age. The research was carried out in the Brzesko Forest District and Forest Research Station in Krynica (S Poland). The sample size equalled 45 and 57 trees respectively. We used the composite form of linear mixed model. The significant positive effect on BAI (model 1) was found for the initial breast height diameter (dbh), the relative crown length as well as the age when trees reaches the 30 cm dbh. The negative impact was observed for Lorimer C18w index. The negative relationship with the relative BAI (model 2) was found for the initial dbh, slenderness, C18w index as well as the age when trees reaches the 30 cm dbh. Conditional and marginal determination coefficients reached 48 and 42% for model 1, and 62 and 38% for model 2 respectively. The results indicate the great possibility and purpose of growing stock maintenance in the pruned silver fir stands. Selecting the trees for the removal should be based on the target dbh. Had it been reached, the firs can still be characterized by a very good current BAI values. One should leave thinner firs with a relative crown length higher than average. Treatments releasing the crowns of the remaining firs, also at the cutting stage, are justified. Smaller growth at a young age (caused e.g. by shading), does not limit the possibility of obtaining trees with significant dimensions.
    Źródło:
    Sylwan; 2017, 161, 06; 467-475
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie retrospektywnego dynamicznego wskaźnika konkurencji do oceny oddziaływania drzew sąsiednich na przyrost pierśnicowego pola przekroju jodły (Abies alba Mill.)
    The application of a retrospective dynamic competition index to assess the impact of neighbouring trees on silver fir (Abies alba Mill.) basal area increment
    Autorzy:
    Pach, M.
    Soberka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/45490.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewa lesne
    jodla pospolita
    Abies alba
    piersnicowe pole przekroju
    przyrost drzew
    drzewa sasiednie
    buk zwyczajny
    Fagus sylvatica
    swierk pospolity
    Picea abies
    oddzialywanie na rosliny
    konkurencyjnosc
    wskaznik Hegyi
    wskaznik Ch
    Źródło:
    Leśne Prace Badawcze; 2011, 72, 4
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tempo zarastania spał na jodle oraz niektóre czynniki na nie wpływające
    The rate of bark-stripping wound closure in fir and some factors affecting it
    Autorzy:
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1012919.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    korony drzew
    lesnictwo
    spalowanie
    tempo zarastania
    szkody lowieckie
    spaly
    jodla pospolita
    uszkodzenia drzew
    Abies alba
    cechy morfologiczne
    zywotnosc
    zarastanie
    drzewa lesne
    abies alba
    bark−stripping damage
    wound closure
    wound characteristics
    live crown ratio
    tree vigour
    Opis:
    The paper presents results of the research conducted in the stands with fir stripped by red deer in the territory of the Forest Experimental Station in Krynica (Beskid Sądecki). The average rate of wound closure expressed in the width of wound closure and the time needed for a wound to heal was determined on the basis of detailed analyses of bark−stripping wounds in the cut trees. Factors influencing wound closure were identified as well. In addition, a multiple regression model explaining about 51% of the variation of the wound healing time was presented.
    Źródło:
    Sylwan; 2008, 152, 04; 46-57
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany udziału buka, jodły i świerka w dolnoreglowych drzewostanach naturalnych w rezerwacie "Dolina Łopusznej" (Gorczański Park Narodowy)
    Changes in the proportion of beech, fir and spruce in the natural stands of the lower-montane zone in the 'Łopuszna Valley' Reserve (Gorczanski National Park)
    Autorzy:
    Jaworski, A.
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/991817.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Gorczanski Park Narodowy
    regiel dolny
    rezerwaty przyrody
    rezerwat Dolina Lopusznej
    drzewostany naturalne
    sklad gatunkowy
    zmiany skladu gatunkowego
    buk zwyczajny
    Fagus sylvatica
    jodla pospolita
    Abies alba
    swierk pospolity
    Picea abies
    liczba drzew
    zasobnosc drzewostanu
    klasy grubosci
    number of trees
    stand volume
    species composition
    mortality
    regeneration
    Opis:
    In the natural stands of the lower−montane zone in the 'Łopuszna Valley' Reserve (Gorczański National Park) consisting of beech, fir and spruce, a specific phenomenon was observed, which in other natural forests of the Western Carpathians occurred only occasionally. In the years 1981−2011, along with the increase in the proportion of beech in stands and in regeneration, which is now common issue in the forests of Central Europe, an increase or stability in the proportion of fir in stands and an increase in the proportion of fir in the undergrowth was reported. At the same time, the number of spruces in stands clearly decreased, while in the regeneration they occurred sporadically. Reduction in the proportion of spruce leads to a change in the species composition of multi−species stands i.e. from stands with co−dominant beech, fir and spruce to stands with dominant beech or co−dominant beech and fir. In managed forests, it is necessary to maintain the prevalence of all tree species for their productivity, which requires the application of the best silvicultural practices (regeneration and tending).
    Źródło:
    Sylwan; 2013, 157, 03; 213-222
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stan wielogatunkowego lasu naturalnego (Abies, Fagus, Picea) regla dolnego w rezerwacie Oszast na tle monokultur świerkowych w Beskidzie Żywieckim i Beskidzie Śląskim
    A comparison of lower montane natural forest (Abies, Fagus, Picea) in Oszast Reserve and spruce monocultures in the Zywiecki Beskid and Slaski Beskid
    Autorzy:
    Jaworski, A.
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1316186.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    lasy gorskie
    regiel dolny
    rezerwaty przyrody
    rezerwat Oszast
    las naturalny
    drzewostany wielogatunkowe
    sklad gatunkowy
    swierk pospolity
    Picea abies
    buk zwyczajny
    Fagus sylvatica
    jodla pospolita
    Abies alba
    klon jawor
    Acer pseudoplatanus
    jarzab pospolity
    Sorbus aucuparia
    zmiany skladu gatunkowego
    zasobnosc drzewostanu
    struktura drzewostanu
    rozklad piersnic
    smiertelnosc
    odnowienia lasu
    stand volume
    dbh distribution
    mortality
    regeneration
    Opis:
    The aim of this research was to find out what changes occurred between 1999-2009 in Oszast reserve in the volume, species composition and diameter at breast height (dbh) distribution of the forest stand, and the number and height of regeneration. The objective was to determine what would be condition of these managed lower montane multispecies forest stands (Swiss irregular shelterwood method or selection cuttings) and what role spruce would play in them if they have not been replaced by spruce monocultures. The research was conducted on three permanent circular sample plots (s.p.), each had size of 1/3 ha. Over 10 years, standing volume of the forest stand increased on s.p. 1 (from around 562 m3 ha-1 to 649 m3 ha-1) and s.p. 3. (from 653 m3 ha-1 to 660 m3 ha-1), while decreased on s.p. 2. (from 421 m3 ha-1 to 378 m3 ha-1). The species composition, defined on the basis of volume share (averaged for the three s.p. jointly), did not undergo consistent changes. However, the relative dominance of beech over spruce was determined based on tree numbers. The average spruce mortality (averaged from three s.p.) did not exceed 10% and was slightly higher than that of beech (6%), and lower than fir mortality (15%). Nevertheless, spruce did not show any symptoms of dieback. The reasons behind its mortality were fallen trees and windbreaks. In regeneration, on the whole, beech or sycamore predominated, and the proportion of spruce and fir was small. In the future spruce and fir may even decrease further by competitive ability of dynamically regenerating beech. Abandonment of forest management to promote greater diversity of species, may favour the formation of beech monocultures, or forest stands dominated by beech, everywhere that beech is already present or will be introduced. The maintenance of stable, multispecies forest stands, with co-dominant fir, beech and spruce of native origin, requires natural or artificial regeneration of spruce and fir, manipulated to restore fir up to about 30%, and reduce spruce down to about 40%. This would be possible through the use of the Swiss irregular shelterwood method and selection system, and by continuous tending of regeneration.
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 1; 13-23
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wplyw gatunkow domieszkowych i wspolpanujacych na wysokosc i piersnice jodly [Abies alba Mill.] oraz zasobnosc drzewostanow jodlowych w Karpackiej Krainie Przyrodniczo-Lesnej
    The influence of admixture and co-dominant species on the height and DBH of silver fir [Abies alba Mill.] and on the growing stock of fir stands in the Carpathian Forest-Natural Region
    Autorzy:
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/45669.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    hodowla lasu
    drzewostany jodlowe
    drzewa lesne
    gatunki domieszkowe
    gatunki wspolpanujace
    jodla pospolita
    Abies alba
    wysokosc drzew
    piersnice drzew
    drzewostany lite
    drzewostany wielogatunkowe
    zasobnosc drzewostanu
    Źródło:
    Leśne Prace Badawcze; 2010, 71, 3; 257-266
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakterystyka wybranych cech morfologicznych świerków wpływających na ich stabilność, ukształtowanych w wyniku stosowania różnych rębni w borze górnoreglowym na Pilsku
    Comparison of various cutting systems affecting those morphological features that determine stability in the Pilsko high mountain spruce forest
    Autorzy:
    Jaworski, A.
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/45403.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    Pilsko
    regiel gorny
    drzewostany swierkowe
    ciecia przerebowe
    rebnie zupelne
    drzewa lesne
    swierk pospolity
    Picea abies
    cechy morfologiczne
    wzgledna dlugosc korony
    wspolczynnik smuklosci
    zywotnosc drzew
    stabilnosc
    Źródło:
    Leśne Prace Badawcze; 2011, 72, 2
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modele struktury grubości w jednopiętrowych drzewostanach z udziałem jodły Abies alba Mill. i buka Fagus sylvatica L.
    Models of diameter structure in single-storied stands with fir Abies alba Mill.and beech Fagus sylvatica L.
    Autorzy:
    Podlaski, R.
    Pach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989766.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany mieszane
    drzewostany jednopietrowe
    struktura grubosci
    jodla pospolita
    Abies alba
    buk zwyczajny
    Fagus sylvatica
    piersnice drzew
    rozklad piersnic
    rozklad Weibulla
    forest patches
    structural heterogeneity
    tree diameter distribution
    weibull distribution
    Opis:
    The objectives of the study were (1) to determine the models of diameter at breast height (dbh) distributions in single−storied mixed stands with fir Abies alba Mill. and beech Fagus sylvatica L. as well as (2) to assess the usefulness of Weibull distribution to approximation of empirical dbh distributions for distinguished models. In the Carpathians (southern Poland) and in the Świętokrzyskie Mountains (central Poland) 36 sample plots ranging in size from 0.1 to 0.4 ha were established. To identify the dbh distribution models in single−storied stands with similar empirical dbh distributions, the hierarchical cluster analysis (HCA) with the Jaccard's measure and the Ward's minimum variance agglomeration method was used. To approximate dbh distributions, the Weibull distribution was employed. Single−storied mixed stands with fir and beech, with the mean age between 50 and 70 years at the dbh, were characterised by a large diversity of dbh distributions. Three groups of stands (I, II, III) differing, among others, in average dbh were determined (fig. 1). In these groups the average dbh ranged from 23.5 to 32.6 cm, from 18.9 to 25.1 cm, and from 13.7 cm to 19.6 cm, respectively. Within these groups, seven models of unimodal distributions were selected (figs. 2−4; tab.). The models are characterised by varying degrees of asymmetry with the highest number of trees from less than 30/ha to more than 300/ha which occurred mainly in the dbh classes between 9 and 33 cm (models AS1, SM1, AS2, AS3, AS4, AS5, SM2). The results of χ² test indicate the high flexibility and suitability of Weibull distribution for modelling of such types of dbh structures.
    Źródło:
    Sylwan; 2015, 159, 07; 586-592
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modele struktury grubości w dwu- i wielopiętrowych drzewostanach z udziałem jodły Abies alba Mill. i buka Fagus sylvatica L.
    Models of diameter structure in two- and multi-storied stands with fir Abies alba Mill. and beech Fagus sylvatica L.
    Autorzy:
    Pach, M.
    Podlaski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/989729.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany mieszane
    struktura grubosci
    drzewostany dwupietrowe
    drzewostany wielopietrowe
    jodla pospolita
    Abies Alba
    buk zwyczajny
    Fagus sylvatica
    rozklad piersnic
    rozklad Weibulla
    rozklad mieszany
    tree diameter modelling
    forest complex structure
    weibull mixture model
    Opis:
    The objectives of the study were (1) to determine the models of diameter at breast height (dbh) distributions in two− and multi−storied mixed stands with fir Abies alba Mill. and beech Fagus sylvatica L. as well as (2) to assess the usefulness of single Weibull distribution and two−component mixture of Weibull distribution to approximation of empirical dbh distributions for distinguished models of dbh structures. In the Świętokrzyskie Mountains, 21 sample plots ranging in size from 0.2 to 0.4 ha were established. To identify the models of dbh distributions, in two− and multi−storied stands with similar empirical dbh distributions, the hierarchical cluster analysis (HCA) with the Jaccard's measure and the Ward's minimum variance agglomeration method were used. To approximate dbh distributions, the single Weibull distribution and the two−component mixture of Weibull distribution were employed. In two− and multi−storied mixed stands with fir and beech, with the mean age between 50 and 70 at the dbh, four models of dbh distributions were determined (fig. 1). Two of them were decreasing, strongly asymmetric (OS and OJ models; fig. 2) and the other two were increasing in the initial phase and decreasing in the final, having two maximums (DM1 and DM2 models; fig. 3). In the stands with the complex structure mixed distribution should be used to approximate empirical data. The analysis revealed high suitability and versatility of Weibull distribution both as single form and two−component mixture.
    Źródło:
    Sylwan; 2015, 159, 08; 632-638
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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