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    Wyświetlanie 1-7 z 7
    Tytuł:
    Półnaturalna przebudowa lipą drzewostanów sosnowych w Nadleśnictwie Doświadczalnym Siemianice
    Semi-natural transformation of pine stands with lime trees in the Siemianice Experimental Forest District
    Autorzy:
    Jaszczak, R.
    Magnuski, K.
    Stefaniak, I.
    Winkler, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009712.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    Tilia cordata
    wzrost roslin
    lipa drobnolistna
    przebudowa polnaturalna
    pozycja biosocjalna drzew
    przebudowa drzewostanow
    lesnictwo
    Nadlesnictwo Doswiadczalne Siemianice
    przyrost drzew
    drzewa lesne
    pine stand
    semi−natural transformation
    lime
    breast height diameter structure
    height structure
    biosocial
    structure
    Opis:
    The paper presents results of the inventories carried out in years 2000 and 2001 in a two−storeyed stands whose upper storey was made up of pine and the lower one – of lime. Lime breast height diameter and height as well as biosocial structures were discussed.
    Źródło:
    Sylwan; 2009, 153, 07; 442-450
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura populacji i kondycja zdrowotna cisa pospolitego w rezerwacie "Cisy nad Liswartą"
    Population structure and health conditions of European yew in 'Cisy nad Liswarta' reserve
    Autorzy:
    Hylla, W.
    Dobrowolska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/989692.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    rezerwaty przyrody
    rezerwat Cisy nad Liswarta
    drzewa lesne
    cis pospolity
    Taxus baccata
    struktura populacji
    struktura grubosci
    struktura wysokosci
    zdrowotnosc drzew
    odnowienia naturalne
    taxus baccata
    vitality
    diameter and height structure
    natural regeneration
    Opis:
    The aim of the study was to recognise the structure (sex, height, diameter) and vitality of European yew (Taxus baccata L.) population in the ‘Cisy nad Liswartą' reserve (50°46'27,12"N 18°47'11,86"E). The field investigations were performed in years 2005−2009. We measured diameter at breast height, diameter at root collar and height of all yews in the reserve. Sex of the individuals was determined as well as their health condition was classified into one of five classes. Total number of life and dead yew specimens (with height over 0,5 m) accounted to 466. Majority of the population grew in dense stands (stand density index 0.5−0.7). Sex was described for 55% of the population. Number of female individuals was 142 (30%) and male 116 (25%). Lack of or small crown transparency was found for 30% of life yew trees. The share of high transparency crowns equalled 11%. Damage caused by the game (especially deer) was older than 10 years and found for 42% life trees. Seedlings occurred under the canopy of 47 mature trees (10% of population). 15 relevés were established in the investigated stands. Natural regeneration of yew was found on 11 of them. 5 characterised with small number of yew seedlings. The greatest number of seedlings equalled 200 individuals. It was found that the number of yews higher than 0.5 m decreased in comparison to the previous surveys. Female and male yew trees occurred in the reserve, so the generative breeding is possible. Health condition of the analysed yew population is moderate. Problems with survival of the seedlings was observed. The special treatments should be recommended – cutting of some competitors to give more light for natural regeneration and fencing the greater number of yew seedlings.
    Źródło:
    Sylwan; 2015, 159, 01; 62-70
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura drzewostanów lipowo-sosnowych powstałych w wyniku półnaturalnej przebudowy starodrzewów sosnowych
    Structure of lime-pine stands established as a result of seminatural reconstruction of old pine forests
    Autorzy:
    Jaszczak, R.
    Małys, L.
    Turski, M.
    Hnat, M.
    Majowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008329.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany sosnowe
    starodrzew
    przebudowa drzewostanow
    przebudowa polnaturalna
    drzewostany lipowo-sosnowe
    struktura drzewostanu
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    lipa drobnolistna
    Tilia cordata
    wzrost roslin
    pozycja biosocjalna drzew
    struktura piersnic
    struktura wysokosci
    old pine forest
    seminatural reconstruction
    pine
    lime
    structure of breast height diameter
    height structure
    biosocial structure
    Opis:
    The paper presents results of the inventory carried out in 2008 in two−storeyed stands in which the upper storey consisted of pine trees and the lower one of lime trees. The structure of breast height diameter, height and the biosocial structure of the two species was discussed.
    Źródło:
    Sylwan; 2012, 156, 05; 360-368
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozkłady teoretyczne najlepiej aproksymujące strukturę pierśnic w drzewostanach świerkowych regla górnego w rezerwacie przyrody "Śnieżnik Kłodzki"
    Theoretical distributions in approximation of breast height diameter structure in upper mountain zone Norway spruce stands in 'Snieżnik Klodzki' nature reserve
    Autorzy:
    Sinica, P.
    Tomusiak, R.
    Tkaczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989425.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    regiel gorny
    rezerwat Snieznik Klodzki
    drzewostany swierkowe
    swierk pospolity
    Picea abies
    piersnice drzew
    rozklad piersnic
    aproksymacja
    rozklad teoretyczny
    dbh distribution
    stand structure
    native type forests
    picea abies
    Opis:
    The study on the structure of Norway spruce old−growth stands of original provenience in upper mountain zone was carried out in a nature reserve ‘Śnieżnik Kłodzki', located in the Lądek Zdrój Forest District (SW Poland). The fieldwork was conducted in three spruce stands located at the altitude of 1,215 and 1,235 m a.s.l. The breast height diameters (dbh) of living trees were characterized. The aim of this study is to characterize the structure of dbh of trees in spruce stands of subalpine forest. Implementation of the objective will be associated with the characteristics of empirical distributions dbh and an indication of theoretical distributions of continuous random variable best approximating the structure of dbh. The comparison of empirical dbh distributions with 36 theoretical distributions were carried out, but goodness−of−fit tests proven statistically significant compatibility with seventeen of them: beta (4−parameter), Cauchy, exponential power, folded normal, gamma (3−parameter), generalized logistic, Laplace, logistic, loglogistic, loglogistic (3−parameter), lognormal (3−parameter), noncentral chi−square, normal, smallest extreme value, triangular, Weibull and Weibull (3−parameter). The dbh distributions in upper mountain spruce stands are the best fitted with logistic distribution, and subsequently loglogistic (3−parameter), generalized logistic and Weibull (3−parameter) distributions. That four distributions can be used in individual tree growth models while generating structure dbh of trees in the stand. The knowledge of dbh structure in protected stands could be helpful in shaping spruce stand structure in planned silvicultural treatments, and shows the need for silvicultural treatments in upper mountain spruce stands.
    Źródło:
    Sylwan; 2016, 160, 11; 905-914
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura drzewostanu w rezerwacie cisowym "Zdroje" w Szczecinie
    Stand structure in the 'Zdroje' common yew nature reserve in Szczecin
    Autorzy:
    Friedrich, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013127.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Taxus baccata
    struktura populacji
    populacje roslin
    rezerwaty przyrody
    wysokosc drzew
    struktura grubosci
    grubosc
    struktura wysokosci
    lesnictwo
    cis
    struktura drzewostanu
    rezerwat Zdroje
    stand structure
    diameter distribution
    height distribution
    common yew
    nature protection
    Opis:
    The paper presents the stand structure in the "Zdroje" common yew nature reserve in Szczecin. In 2006 the stand was built by 1848 trees that belonged to 14 species. Scots pine was the most numerous species (1067 trees). There were also 533 common yews. The other species were represented by 1−76 specimens. The diameter structure of six the most important species as well as the height structure of a common yew were analysed. Changes in the height structure of a common yew over 28 years were presented as well. No natural regeneration of common yew was observed.
    Źródło:
    Sylwan; 2008, 152, 08; 25-34
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urządzanie lasu w Polsce po drugiej wojnie światowej w świetle źródłowych publikacji Sylwana. Część III. Regulacja i planowanie w gospodarstwie leśnym
    Forest management in Poland after the Second World War in the light of source publications from 'Sylwan' journal. Part III. Regulation and planning in forest enterprise
    Autorzy:
    Magnuski, K.
    Jaszczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013144.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    okres powojenny
    historia
    Polska
    planowanie
    uzytkowanie lasu
    lesnictwo
    regulacja uzytkowania rebnego
    uzytkowanie rebne
    urzadzanie lasu
    stand structure
    diameter distribution
    height distribution
    common yew
    nature protection
    Opis:
    The paper presents the stand structure in the "Zdroje" common yew nature reserve in Szczecin. In 2006 the stand was built by 1848 trees that belonged to 14 species. Scots pine was the most numerous species (1067 trees). There were also 533 common yews. The other species were represented by 1−76 specimens. The diameter structure of six the most important species as well as the height structure of a common yew were analysed. Changes in the height structure of a common yew over 28 years were presented as well. No natural regeneration of common yew was observed.
    Źródło:
    Sylwan; 2008, 152, 08; 3-16
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Struktura naturalnego drzewostanu buczyny karpackiej w Tatrach na tle naturalnych buczyn z innych masywów Karpat
    Structure of natural stand of a carpathian beech forest in the Tatra mountains compared with natural beech stands from other parts of the Carpathian
    Autorzy:
    Szwagrzyk, J.
    Sułowski, W.
    Skrzydłowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1018691.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Tatry
    Karpaty
    lesnictwo
    drzewostany naturalne
    struktura drzewostanu
    buczyna karpacka
    canopy stratification
    diameter distribution
    height distribution
    mixed temperate forests
    natural stands
    Opis:
    The aim of this study was to compare the structure of newly found remnant of natural beech forest in Suchy Żleb in the Tatra mountains with the structure of natural tree stands in other parts of the Carpathians. In the sample plot of the size of 1 ha the stand basal area amounted to 36.7 m2; of that, 42.7% was beech, 37.4% silver fir, 19.8% Norway spruce, and 0.1% sycamore maple. In the units of volume silver fir was the most important tree in the stand (47%), while the share of beech was only 33%; the total wood volume of live trees was equal to 446.8 m3/ha. Tree number was equal to 442, among them 327 beeches, 73 silver firs and 41 Norway spruces. Number of snags was 26, and their volume 26.16 m3. Total amount of coarse woody debris was 159 m3 per hectare. Sub−canopy layer was dominated by beech, the middle layer of tree stand was a mixture of all three species, and the highest canopy layer consisted only of spruce and fir. The analyzed stand had biomass accumulation slightly below the average for the natural mixed beech forests of the Carpathians, probably because of selective tree cutting in the past. Because Suchy Żleb is the only remnant of natural stand in the montane zone of the Tatra mountains, it is very valuable as an object for comparisons with natural beech stands growing in other ranges of the Carpathians.
    Źródło:
    Sylwan; 2006, 150, 09; 3-15
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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