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    Wyświetlanie 1-14 z 14
    Tytuł:
    Fluorescencja chlorofilu igiel klonow jodlowych [Abies alba Mill.] w archiwach genetycznych zlokalizowanych na roznych wysokosciach nad poziomem morza w Karkonoskim Parku Narodowym
    Chlorophyll fluorescence of silver fir [Abies alba Mill.] clone needles in genetic archives located at different altitudes in the Karkonosze National Park
    Autorzy:
    Niemczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/46158.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    Karkonoski Park Narodowy
    hodowla lasu
    drzewa lesne
    wysokosc nad poziomem morza
    jodla pospolita
    Abies alba
    klony
    igly jodlowe
    fluorescencja chlorofilu
    pomiary
    maksymalna wydajnosc kwantowa
    tlumienie niefotochemiczne
    tempo transportu elektronow
    Źródło:
    Leśne Prace Badawcze; 2009, 70, 3; 213-221
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ryzyko masowego występowania pędraków chrabąszczy (Melolontha spp.) w strefie ekotonowej drzewostanów dojrzałych na terenie Nadleśnictwa Lubaczów
    Risk of the mass occurrence of cockchafer (Melolontha spp.) grubs in the ecotone of mature stands in Lubaczow Forest District
    Autorzy:
    Niemczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989889.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany dojrzale
    ekotony
    ekoton las-laka
    szkodniki roslin
    chrabaszcz majowy
    Melolontha melolontha
    chrabaszcz kasztanowiec
    Melolontha hippocastani
    pedraki
    wystepowanie masowe
    ryzyko wystapienia
    regresja logistyczna
    Nadlesnictwo Lubaczow
    melolontha spp.
    forest−meadow ecotone
    mature stand
    logistic regression
    Opis:
    This study evaluated the environmental risk drivers affecting the occurrence of cockchafer grubs in mature stands bordering with open spaces. The following factors were taken into the consideration: the distance from the edge towards the forest interior, the forest site type, species composition, canopy openness and the cover of forest floor with vegetation as well as cutting treatment in some of the investigated stands. In one of the biggest cockchafer outbreak centers in Poland (Lubaczów Forest District; SE Poland) 6 mature stands were chosen and estalished 5 transects in each of them. Each transect was 250 m long and consisted of 6 pits (1×0.5×0.5 m) in a regular distance of 50 m with the first pit on an open space bordering with forest. Pits were used to determine the grub infestation of the soil. In the area of 100 m² around the pit, the general vegetation cover and tree species composition of a stand were characterized. The forest light environment was defined by hemispherical photography. The distance in transect and the fact that stand was harvested were also taken into consideration. The applied logistic regression model demonstrated that the site fertility is the most important factor that significantly increases the risk of cockchafer grubs occurrence. The other characteristics that also cause that stand is more attractive for the cockchafer grubs are: participation of the broadleaved species in stand composition and the dense vegetation cover. Furthermore, the cockchafer grubs occurrence was more frequent in the forest interior than in an open space or at the forest−meadow ecotone.
    Źródło:
    Sylwan; 2015, 159, 04; 326-335
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wzory do określania pierśnicowej liczby kształtu mieszańców selekcyjnych topoli
    Equations for diameter at the breast height form factor of poplar and its hybrids
    Autorzy:
    Niemczyk, M.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989038.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    plantacje roslin energetycznych
    drzewa szybkorosnace
    mieszance
    topola
    Populus
    piersnicowa liczba ksztaltu
    wzory empiryczne
    populus
    form factor
    empirical equations
    Opis:
    Knowledge of diameter at the breast height (DBH), tree height and form factor allows to estimate tree volume, which is one of the most important measures in forestry. The paper presents empirical equations for the determination of DBH form factor of different species and hybrids of Populus sp. The study was set up on short−rotation plantation in Wichrowo Forest District (northern Poland). Four poplar hybrids at the age of six were taken into account: P. × generosa × P. trichocarpa, P. trichocarpa, P. maximowiczii × P. trichocarpa, Populus × canadensis. In total, 427 trees were felled and individually measured in one meter sections. The estimation equations are based on the relationships between form factor and one or some independent variables derived from diameter at breast height and height. We used determination coefficient as a goodness−of−fit measure. In addition, standard error of estimates from this dataset was calculated. The standard error values varied from 5.8 to 6.6% depending on the formulae and Populus hybrids. Th e equations proposed in this paper enable the determination of the discussed form factor for varied poplar cultivars and can be treated as a regional equations.
    Źródło:
    Sylwan; 2017, 161, 05; 413-421
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Proweniencyjno-rodowa zmienność terminu wiosennego rozwoju pąków brzozy brodawkowatej (Betula pendula Roth)
    Provenance-family variation in the time of spring bud development in silver birch (Betula pendula Roth)
    Autorzy:
    Wojda, T.
    Niemczyk, M.
    Kowalczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/994522.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    fenologia
    drzewa
    brzoza brodawkowata
    Betula pendula
    paki lisciowe
    rozwoj pakow
    rozwoj wiosenny
    proweniencje
    rody hodowlane
    bud development time
    provenance
    family
    heritability
    Opis:
    The aim of this study was to assess the variation of bud development time of the Polish and Latvian silver birch provenances and its impact on tree growth in the juvenile phase. The assessment of bud development was carried out in 2008 and 2009 on three experimental plots with ten Polish and three Latvian provenances using a six−point scale. Browsk, Augustów and Latvian provenances are in the group of provenances that develop early buds, while the provenances from Łobez, Młynary and Golub develop late buds. The spring development of silver birch buds shows a clinal variation depending on the longitude. The spring leaf development of the eastern provenances begins earlier than the western ones. The dependence of growth traits on the time of bud development has not been sufficiently proven and requires further research.
    Źródło:
    Sylwan; 2012, 156, 03; 197-207
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura drzewostanów a populacje cisa pospolitego (Taxus baccata L.) w rezerwatach przyrody "Cisy Rokickie" i "Bogdanieckie Cisy"
    Stand structure and populations of yew (Taxus baccata L.) in the Cisy Rokickie and Bogdanieckie Cisy reserves
    Autorzy:
    Dobrowolska, D.
    Olszowska, G.
    Niemczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/46236.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    rezerwaty przyrody
    rezerwat Cisy Rokickie
    rezerwat Bogdanieckie Cisy
    drzewa lesne
    gatunki chronione
    cis pospolity
    Taxus baccata
    struktura drzewostanu
    zywotnosc
    pokrycie powierzchni
    odnowienia naturalne
    pokroj
    Źródło:
    Leśne Prace Badawcze; 2012, 73, 4
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przydatność hodowlana wybranych odmian topoli w plantacjach energetycznych o krótkim cyklu produkcji
    Silvicultural potential of selected poplar cultivars growing on short rotation plantations
    Autorzy:
    Niemczyk, M.
    Wojda, T.
    Kantorowicz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/989267.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    topola
    uprawa plantacyjna
    plantacje roslin energetycznych
    surowce energetyczne
    biomasa
    topola sekcji Aigeiros
    topola sekcji Tacamahaca
    przydatnosc hodowlana
    poplar
    energy plantation
    short rotation coppice
    biomass
    Opis:
    The use of biomass for energy purposes is an important European Union policy. In light of the restrictions concerning the use of the full−value wood from forests for energy purposes, short rotation forestry can become an alternative source of woody biomass. In this context, the most promising species is poplar (Populus spp.), productivity of which depends on various aspects such as plant spacing, cutting cycles, fertilization and cultivar characteristics. The aim of this study was to assess the possibility of cultivation of ten selected poplar clones from the section Aigeiros and Tacamahaca in short−rotation coppice in the climatic conditions of Poland. An experiment was set up in the north−eastern part of Poland in the Wichrowo Forest District. Survival, tree stocking, and biomass yield were compared. Productivity of clones was examined in five−year cutting cycle. The highest dry biomass yield (7.8 t/ha/yr) was achieved by the clone 'Hybrida 275'. In contrary, the biomass yield of the worst clone ('AF−8') amounted to 2 t/ha/yr. Some other Italian clones, such as 'AF−6' and 'MON' were not able to adapt to the local conditions at all and were excluded from the experiment. Because of the need to implement the full economic analysis of short rotation poplar plantations, it would be important to study propagation ability of certain currently studied varieties of poplar in subsequent rotations and with different production cycle period length up to the end of biomass production on a given plantation. Resistance to diseases of energy poplar plantations should also be researched.
    Źródło:
    Sylwan; 2016, 160, 04; 292-298
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ ażurowości drzewostanu osłaniającego na wzrost cisa pospolitego (Taxus baccata L.)
    The influence of stand canopy openness on the growth of common yew (Taxus baccata L.)
    Autorzy:
    Niemczyk, M.
    Żółciak, A.
    Wrzesiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1312166.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewa lesne
    ochrona ex situ
    cis pospolity
    Taxus baccata
    wzrost roslin
    powierzchnie zachowawcze
    drzewostany oslaniajace
    gatunki oslonowe
    azurowosc
    common yew
    ex-situ conservation plots
    canopy openness
    Opis:
    The aim of this study was to evaluate the development of common yew, Taxus baccata L., with respect to canopy openness. The plants were growing in ex-situ conservation plantations (established in 2008) in the understory of different tree species. Eleven forest plantations belonging to the following five forest districts were inventoried: Rokita, Baligród, Kołaczyce, Międzylesie and Henryków. In each plantation, the height and height increment of 200 yews were measured and gap light transmission indices were determined. The canopy species affecting yew growth most significantly were oak (Quercus sp.) and Scots pine (Pinus sylvestris L.), followed by Norway spruce (Picea abies Karst.), silver fir (Abies alba L.) and European beech (Fagus sylvatica L.). The most favorable development of yew occurred at 30% canopy openness. An increasing light transmission index correlated with a decrease in the proportion of treelike yews. An insufficient amount of light resulted in a low height increment of yews growing under the canopy and an extended period of direct competition of yews with herbaceous species.
    Źródło:
    Leśne Prace Badawcze; 2015, 76, 1; 42-48
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena rębni gniazdowej na podstawie drzewostanów uszkodzonych w lasach nizinnych Polski
    Evaluation of the group cutting system on the basis of damaged forests in lowland Poland
    Autorzy:
    Łukaszewicz, J.
    Niemczyk, M.
    Dmyterko, E.
    Bruchwald, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989687.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    przebudowa drzewostanow
    rebnie gniazdowe
    rebnie czesciowe gniazdowe
    drzewostany nizinne
    uszkodzenia drzewostanow
    czynniki abiotyczne
    czynniki biotyczne
    group cutting system
    sawtimber stand
    demaged stand
    Opis:
    The paper compares the proportion of damaged stands managed under group cutting system (group clear cutting and group shelterwood cutting) with the analogous stands where cuts had not been performed. The empirical material came from the database of the State Forests Information System and covered all forest districts located in Polish lowlands. To evaluate the group cutting a test of differences between the fractions of the elements distinguished in the population was used. The first population involved sawtimber stands in which no group cuts had been performed in the past decade. The number of damaged stands was determined for this population and their percentage share was established. A similar procedure was applied to the second population of stands in which the group cutting was employed. A damaged stand was assumed to be one in which the volume of windbroken and windfallen trees and deadwood harvested in the past 10 years exceeded the volume set in the given formula (1). The performed analysis shows that after several years, the proportion of damaged stands in which gaps were established is significantly higher (57.2%) than in the stands without cut patches (32.9%). Stands with patches demonstrate a significant, statistically greater susceptibility to damage from abiotic and biotic factors. The proportion of damaged stands managed under the group shelterwood cutting (60%) is larger than that under the group clear cutting (55.4%). Spruce is the most vulnerable to damage, while alder − the least vulnerable. On average, the higher proportion of damaged forests, mainly pine and oak forests is in the territory of the Bialystok Regional Directorate of the State Forests (RDSF) (tab. 2) being lower in the territory of the Warsaw RDSF where damaged pine stands are more frequent (tab. 3). In areas with a high probability of damage to stands group cut should be limited, and in spruce stands – totally abandoned. Time regimes should also be established applying the group cutting by shortening the period of reconstruction of the entire forest stand.
    Źródło:
    Sylwan; 2015, 159, 01; 3-12
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakterystyka wybranych drzewostanów jodłowych Beskidu Niskiego i sposoby ich zagospodarowania
    The characteristics of selected fir stands in Beskid Niski and the method of their management
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Niemczyk, M.
    Łukaszewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989908.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gory
    Beskid Niski
    drzewostany jodlowe
    struktura drzewostanu
    liczba drzew
    piersnicowe pole przekroju
    miazszosc drzew
    zagospodarowanie lasu
    stand layer
    multi−layer structure
    bdq method
    abies alba
    Opis:
    Assuming multilayer structure as optimal for silver fir stands, we attempted to answer the following questions: 1) how to describe such structure, 2) to what extent does the structure of a particular stand differ from the optimal one, and 3) how to obtain the optimal structure. The study was based on the material collected in 12 stands in the Nawojowa Forest District (S Poland). Three to five 0.04 hectare circular plots were established in each stand, and diameters at breast height (d) of all trees with d > 7 cm were measured. Height (h) was measured for 25 trees selected within the stand. The top height determined for each stand enabled to classify trees into two layers: higher (group I) or lower (group II) than ⅔ of top height. Trees with d<7 cm were divided into 3 layers according to the height: III – h>2 m (higher upgrowth), IV – h between 0.5 and 2 m (lower upgrowth), and V – h<0.5 m (seedlings). Trees in layer V were counted on a 0.005 ha plot, while trees in layers IV and III on a 0.04 ha plot. The selected fir stands revealed high diversity in basic characteristics (tab. 1 and 2). The number of trees in layer III was higher than in layer II only in one stand, and was larger than the number of trees in layer I. Moreover, the variation in tree height formed a vertical canopy closure. The stand was considered to be a model one, and used to develop diameter distribution according to the BDq method. Most stands characterized a smaller number of trees in lower and larger in higher diameter classes compared to the model distribution. It seems that large number of thick trees prevent satisfactory growth of thinner trees. Fir stands proved to have a mosaic vertical structure. In some fragments, eight classes can be distinguished including one layer only: 1) upper (I), 2) middle (II), 3) upgrowth (III), combination of layers: 4) I and II, 5) I and III, 6) II and III, 7) I, II and III, and 8) gaps. The multi−layer structure of fir stands can be maintained only in the form of such a mosaic, but single−layer fragments are also needed to enhance the natural regeneration. We could select a stand with a close−to−optimal multilayer structure, which was considered as a model one and its diameter distribution was used in the BDq method. A comparison of the model curve with the empirical distribution of diameters at breast height for the stand under consideration allows determining diameter classes with an excess of trees that can be harvested without the fear of losing the multilayer structure of the stand. Whether a given tree has to be cut should depend on the vertical differentiation of trees in a particular fragment of the stand. In further studies, measurements in multilayer fir stands should be conducted to verify the model distribution.
    Źródło:
    Sylwan; 2015, 159, 09; 722-731
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tempo wzrostu wysokości i pierśnicy jodły pospolitej (Abies alba Mill.) w Beskidzie Niskim
    Height and diameter growth rates of silver fir (Abies alba Mill.) growing in Beskid Niski mountains
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Niemczyk, M.
    Łukaszewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989756.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    jodla pospolita
    Abies alba
    wzrost roslin
    wysokosc drzew
    piersnice drzew
    przyrost piersnicy
    przyrost wysokosci
    tempo wzrostu
    Beskid Niski
    height growth rate
    diameter growth rate
    spatial diversity of canopy layers
    physical age
    abies alba
    Opis:
    Silver fir is one of the main tree species of mountain and foothill forests in Poland that in optimal conditions forms pure stands with multi−layer structure. The study objective is to present differences in height and diameter growth rates of firs growing in upper stand layers and in the undergrowth. The research was conducted in 12 fir stands located in the Beskid Niski Mts. (southern Poland). In each stand height and diameter at breast height (dbh) were measured for 25 fir trees in order to develop a height curve. The first canopy layer included trees that were higher than ⅔ Hmax established from the height curve of the tree with the largest dbh. Height and diameter were measured on eight trees selected from the first canopy layer. An increment core was extracted at breast height in order to estimate the tree age. From the third canopy layer, which included trees higher than 2 m with dbh below 7 cm, five trees were selected. After cutting those trees, the length of the last ten branch whorls was measured. Five−year ring width measurements starting from the bark towards the pith were done at the stem cross−sections obtained at breast height. The number of rings was counted on remaining stumps. Height growth rate was defined as the height at the base age of 100 years (eq. 1). For the first canopy layer, the height growth rate was on average 31.8 m, while for the undergrowth it was 12.1 m. There was also large difference between diameter growth rate of the first stand canopy layer (55.7 cm) and undergrowth (18.3 cm). Both differences were significant at p=0.05. These discrepancies could result from low amount of light reaching the forest floor. The correlation between height and diameter growth rates and undergrowth tree age was negative in both cases. Long periods of shading result in smaller number of firs reaching the first canopy layer. Assuming that uneven−aged stand structure is optimal for that species, it should be characterized by a spatial variability (mosaic) of various canopy layers including even−aged patches with sparse canopy closure as well as gaps where fir regeneration will be initiated having favorable growth conditions.
    Źródło:
    Sylwan; 2015, 159, 10; 804-812
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wzorzec rozkładu pierśnic drzew wielowarstwowego drzewostanu jodłowego Gór Świętokrzyskich
    Pattern of breast height diameter distribution in a multilayer silver fir stand in the Swietokrzyskie Mountains
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Łukaszewicz, J.
    Niemczyk, M.
    Wrzesiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989331.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Gory Swietokrzyskie
    drzewostany jodlowe
    jodla pospolita
    Abies alba
    rozklad piersnic
    metoda BDq
    diameter distribution
    abies alba
    bdq method
    Opis:
    In Poland, the majority of silver fir stands is characterised by a single−layer stand structure. The current silvicultural activities aim at obtaining multilayer stands, which requires a clearer definition of the structure, and more precisely, a better knowledge of the pattern of diameters at breast height (DBH) distribution. The aim of the research was to develop a pattern of DBH distribution of trees in a multilayer silver fir stand in the Świętokrzyskie Mountains (central Poland) using the BDq method, through the mathematical determination of function parameters, including the productive capacity of the habitat. The application of this pattern will allow the selection of the management methods aimed to obtain and then maintain model stands with a different layer structure. The research was based on the empirical material collected in 56 stands that were characterized by both a single− and a multi−layered structure. They grew in coniferous forest habitats, mostly in the upland mixed coniferous forest, upland mixed deciduous forest and upland deciduous forest or mountain forest. One big (up to 1 ha) or 3−5 smaller (0.04 ha) sample plots were established in each stand in which diameters at breast height of all trees and heights of usually 25 trees, selected from the entire range of diameters, were measured. These were used to determine the height growth curve equation coefficients and then the height of each tree. For each stand the basal area was calculated and a graph for DBH distribution was prepared. Site index was established using the original empirical equation. In order to develop a model for multilayer fir stands, individual parameters of the equation 5, such as the basal area (B), the target diameter at breast height (D) and the coefficient q were to be determined using the BDq method. Taking into consideration only stands with one−tailed DBH, individual parameters of the function were found to be associated with site index. Empirical equations were developed for the determination of B and D, and, based on the DBH distribution graphs, coefficient q associated with site index was also calculated (tab.). The developed DBH distribution pattern is a mathematical description of the target fir stand. When the value of stand parameters approaches those of the model stand, it should be managed using the shelterwood cutting system, which results from the spatial variation in the stand height structure, and consequently from the need for different silvicultural treatments in different stand fragments.
    Źródło:
    Sylwan; 2016, 160, 09; 741-750
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Podstawy planowania składu gatunkowego w lasach górskich na przykładzie Beskidu Niskiego
    Basis of the species composition planning model for mountain forests on the example of Beskid Niski Mts.
    Autorzy:
    Bruchwald, A.
    Dmyterko, E.
    Mionskowski, M.
    Niemczyk, M.
    Łukaszewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/972988.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    hodowla lasu
    planowanie
    czynniki siedliska
    typy siedliskowe lasu
    leśnictwo
    tereny górskie
    lasy górskie
    skład gatunkowy
    wysokość nad poziomem morza
    rzeźba terenu
    species composition
    habitats
    landforms
    mountain forests
    Opis:
    The study presents a method of planning species composition of forest stands in mountain areas on the example of Beskid Niski Mts. (south−eastern Poland). The focus was on the species composition of forest stands growing in different conditions, taking into account the type of forest habitat and terrain characteristics: altitude, exposition and slope. The research was based on data stored in the Information System of the State Forests. We used modified growth model for data processing and calculation of site index for the forests older than 60 years. The Beskid Niski Mts. are covered mostly by European beech (33.8%), silver fir (28.3%) and Scots pine (18.9%). Taking into account exclusively the productive capacity of individual forest stands, fir and spruce would be the most desirable species in analysed region. The Beskid Niski Mts. are characterized by a very small diversity of the habitat with domination of mountain fresh deciduous forest (LGśw, 92.1% of the area). We divided analysed region into four altitudinal zones that vary greatly in fraction of afforested area. Beech dominates in all zones and its share increases from the foothills to montane zone (fig. 5). Basing on a digital terrain model, the areal share of 10 landforms was determined for each stand and altitudinal zone (fig. 8). This enabled more detailed planning of species composition. However, it required the adoption of six specific assumptions including the need to maintain a suitable proportion of all tree species growing in the mountains, specifically the main forest tree species: spruce, fir and beech. The 5−stage project (preliminary, historical, current, planning, verification stages) consisting of planning species composition uses, in stage 4, detailed information on landforms. The project assumes that the fragments of forests where trees are expected to grow fast will be earmarked for endangered species. The model sees the need of planting the weaker tree species to be present in the forest ecosystems of the Beskid Niski. The proposed project will enable foresters−practitioners to plan the forest species composition for each of the forest districts in the Beskid Niski quickly. Such a programme might also be an integral part of the growth model of forests useful for forecasting and increasing timber resources.
    Źródło:
    Sylwan; 2016, 160, 03; 219-229
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dokładność Numerycznego Modelu Terenu tworzonego w oparciu o satelitarny pomiar GPS
    Accuracy of the Digital Terrain Model developed on the basis of the GPS satellite measurements
    Autorzy:
    Niedojadło, Z.
    Sopata, P.
    Stoch, T.
    Kołtyś, W.
    Niemczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/164255.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Górnictwa
    Tematy:
    numeryczny model terenu NMT
    metoda GPS-RTK
    niecka obniżeniowa
    digital terrain model (DTM)
    GPS-RTK method
    subsidence trough
    Opis:
    Informacje o przebiegu rzeźby terenu, szczególnie na obszarach podlegających przekształceniom wskutek szeroko pojętej działalności górniczej, umożliwiają przestrzenne monitorowanie procesów i zjawisk związanych z deformacjami powierzchni. W artykule opisano generowanie oraz wynikające z tego procesu dokładności Numerycznego Modelu Terenu, stanowiącego jedną z metod graficznego opracowania pomiaru. Jako dane źródłowe do tworzenia NMT wykorzystano wyniki pomiaru GPS-RTK otrzymane z kilku niezależnych serii obserwacyjnych. Zrealizowano je w odpowiednio dobranym do tego celu testowym obszarze badań, charakteryzującym się zróżnicowaną morfologią i zagospodarowaniem.
    Data on land relief, particularly in areas which undergo transformations due to the broadly-defined mining activities, enables the spatial monitoring of processes and phenomena connected with surface deformations. This paper presents the development and accuracy of the Digital Terrain Model (DTM), one of the methods of graphical measurements preparation. The results of GPS-RTK measurements obtained from several independent series of observations were used as the source data for DTM preparation. They were implemented in a carefully selected research area with diverse morphology and land development.
    Źródło:
    Przegląd Górniczy; 2014, 70, 8; 137-141
    0033-216X
    Pojawia się w:
    Przegląd Górniczy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kształtowanie się przyrostu grubości jodeł z Gór Świętokrzyskich
    Radial increment of silver fir from the Swietokrzyskie Mts.
    Autorzy:
    Bruchwald, A
    Dmyterko, E.
    Bijak, S.
    Łukaszewicz, J.
    Niemczyk, M.
    Wrzesiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989406.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    sloje przyrostu rocznego
    analiza dendrochronologiczna
    Gory Swietokrzyskie
    drzewostany jodlowe
    jodla pospolita
    Abies alba
    przyrost drzew
    przyrost grubosci
    przyrosty radialne
    czynniki srodowiska
    czynniki klimatyczne
    zanieczyszczenia przemyslowe
    abies alba mill.
    tree−rings
    increment reduction
    increment release
    disturbances
    Opis:
    The paper presents the dendrochronological analysis of silver firs (Abies alba Mill.) growing in the canopy layer of the forest stands. We searched for the similarities in the rhythm of radial growth of studied trees and we analysed the response of these stands to the increment disturbances related to the occurrence of adverse climatic factors and the pressure from industrial pollution. The research material was collected in 30 pure and uneven−aged silver fir stands located in the Świetokrzyskie Mountains (central Poland). We investigated the effect of age of the stands and the conditions for their growth (location, forest habitat type) on an average tree−ring width. In order to detect similarities in the rhythm of radial growth of the surveyed stands, we grouped the raw chronologies by the means of the cluster analysis, using Ward's agglomeration procedure with 1−r distance (r – Pearson correlation coefficient). We assessed the incremental response of the investigated stands to the disturbances (situations of significantly reduced radial growth) using indicators of resistance, recovery and resilience proposed by Lloret et al. [2011]. We also studied the influence of the stand age and the forest habitat type on the response of analysed for stands to the detected disturbances. The shortest chronology consisted of 94 tree−rings, while the longest one of 137. Average length of the obtained silver fir chronologies was 119 years. Older fir stands characterised with narrower rings (r=–0.451, p=0.012). Neither the location, nor the forest habitat type are the factors determining the similarity of the rhythm of radial growth of silver firs from the Świętokrzyskie Mountains (p=0.243 and p=0.967 respectively). The extreme climatic conditions responsible for the majority of the short−term (one−year−long) incremental depressions are the factor of regional importance, which affects the growth of investigated trees. Older stands characterized with better possibilities of increment recovery after the disturbance than younger stands (p<0.001), which may be a result of the production of secondary crowns. No consistent differences in the indices of resistance and resilience were found among analysed stands.
    Źródło:
    Sylwan; 2016, 160, 11; 893-904
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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