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    Wyświetlanie 1-6 z 6
    Tytuł:
    Odnowienie naturalne w zamierających drzewostanach Puszczy Jodłowej
    Estestvennoe vozobnovlenie v otmirajushhikh nasazhdenijakh pikhtovojj pushhi
    Natural regeneration in dying stands of Puszcza Jodlowa ("Fir Forest")
    Autorzy:
    Zachara, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/824682.pdf
    Data publikacji:
    1988
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    Puszcza Jodlowa
    drzewostany jodlowe
    lasy zamierajace
    odnowienia lasu
    odnowienia naturalne
    Źródło:
    Sylwan; 1988, 132, 10
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sposoby wykorzystania odnowień brzozy brodawkowatej Betula pendula Roth do przebudowy na obszarach po rozpadzie drzewostanów świerka pospolitego Picea abies (L.) H. Karst. w Beskidzie Śląskim
    Ways to use silver birch Betula pendula Roth regeneration in sites considered for stand conversion due to decline of Norway spruce Picea abies (L.) H. Karst. in the Silesian Beskid Mountains
    Autorzy:
    Ambrozy, S.
    Zachara, T.
    Kapsa, M.
    Chomicz-Zegar, E.
    Vytscha, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/46018.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewostany swierkowe
    swierk pospolity
    Picea abies
    drzewostany pokleskowe
    odnowienia lasu
    odnowienia naturalne
    brzoza brodawkowata
    Betula pendula
    wykorzystanie
    przebudowa drzewostanow
    Opis:
    One of the tree species appearing after a decline of Norway spruce Picea abies (L.) H. Karst. in the Silesian Beskid Mountains is Silver Birch Betula pendula Roth. Therefore our study was aimed at evaluating this birch regeneration and the dynamics of changes resulting from experimental cutting. Measurements and inventories of trees were conducted on research plots located in a ten-year old birch regeneration site with either no cutting, partial cutting (50%) or clear cutting (100%) of birch. We observed an introduction of biocenotic species (rowan, willow, aspen) as well as the target species (spruce, fir, beech) under the birch canopy. Fir and beech were also planted, because of their slow natural regeneration. The clear cut treatment caused a great number of sprouts growing from birch stumps, reaching a height of about 2 m over 3 years, resulting in competition with the regeneration of other species. Partial cutting did not cause such a drastic amount of sprouting. Furthermore, we found that only the spruce height increment is significantly less under a birch canopy compared to open space. The obtained results indicate a necessity to adjust the density and species composition of regenerating tree species under a birch canopy, avoiding complete removal of the first generation birch cover and the need to moderately thin out birch.
    Źródło:
    Leśne Prace Badawcze; 2017, 78, 3
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Propozycje postepowania hodowlanego z cisem [Taxus baccata L.] w lasach
    Autorzy:
    Zachara, T.
    Lukaszewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/824692.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Taxus baccata
    odnowienia sztuczne
    baza nasienna
    hodowla lasu
    sadzonki
    cis pospolity
    lesnictwo
    odnowienia naturalne
    zabiegi pielegnacyjne
    drzewa lesne
    Źródło:
    Sylwan; 2002, 146, 04; 5-16
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność genetyczna naturalnego odnowienia i drzewostanu macierzystego sosny (Pinus sylvestris L.) i świerka (Picea abies L. Karst.)
    Genetic variability of Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies L. Karst.) natural regeneration compared with their maternal stands
    Autorzy:
    Nowakowska, J.A.
    Zachara, T.
    Konecka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1206918.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewostany macierzyste
    odnowienia naturalne
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    swierk pospolity
    Picea abies
    zmiennosc genetyczna
    Opis:
    The genetic variability and biodiversity of tree populations ensure the stability and sustainability of forest ecosystems. New research tools based on molecular DNA markers enable precise characterisation of forest genetic resources, i.e. detection of different allele frequencies in mature trees and progeny populations. The paper describes the genetic structure of mature stands of Scots pine (Pinus sylvestris L.) in Oława Forest District and Norway spruce (Picea abies L. Karst.) in Jawor Forest District and stands of their respective progeny. In the Scots pine stand, there was a slight increase (0.6%) in heterozygosity level and a larger increase (4.9%) in the inbreeding coefficient of progeny trees. In the Norway spruce stand, despite a small reduction (0.9%) in heterozygosity, a similar increase (4.6%) in the inbreeding coefficient of progeny was revealed. In both stands, allele richness and the partition probability of basic clustering were high. Both pine and spruce adults and progeny trees were characterised by high levels of genetic similarity (96% and 79%, respectively). Gene flow between the mature and progeny populations was high (Nm > 1) for both Scots pine and Norway spruce. Conservation of the gene pool within forest tree stands requires an increase in the proportion of natural regeneration. To estimate the extent to which genes are transmitted between adult trees and their progeny, more studies are needed, especially taking into account the influence of silviculture measures, like selective tree cutting, on the genetic variability of the younger generation. These results confirm that the gene pool was conserved when transmitted between the stands studied, as well as highlight the usefulness of such a study for silvicultural purposes.
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 1; 47-54
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany w strukturze genetycznej naturalnego odnowienia dębu (Quercus petraea [Matt.] Liebl.) w odniesieniu do drzew matecznych
    Changes in genetic structure of sessile oak (Quercus petraea [Matt.] Liebl.) natural regeneration in relation to maternal trees
    Autorzy:
    Nowakowska, J.A.
    Michalska, A.
    Zachara, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/990023.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    badania genetyczne
    dab bezszypulkowy
    Quercus petraea
    odnowienia naturalne
    struktura genetyczna
    markery DNA
    drzewa potomne
    drzewa mlode
    zroznicowanie genetyczne
    drzewa mateczne
    zmiennosc genetyczna
    ssr markers
    genetic differentiation
    natural regeneration
    Opis:
    The genetic variability of sessile oak (Quercus petraea L.) mature stand and its natural progeny was investigated. Comparison between genetic structure of parental and progeny trees was based on frequencies of nuclear microsatellite (SSR) alleles occurring in three DNA loci. A slight (4%) increase of gene pool between oak mature and progeny trees was revealed by heterozygosity level estimation, maintaining 86.3% of genetic similarity between generations. Also allele richness, partition probability of basic clustering and inbreed coefficient proved the high genetic similarity between parental and progeny of investigated oak trees. The gene flow occurred within the stands as far as rare alleles were transmitted or new ones appeared in the progenies. The results highlight the necessity of such a study for silvicultural measures taken in order to proceed natural or artificial regeneration in forest tree stand.
    Źródło:
    Sylwan; 2014, 158, 02; 83-89
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wzrost odnowień na gruntach porolnych prowadzonych w ramach przebudowy drzewostanu metodą sztucznych luk
    Growth of broadleaved species on post-agricultural lands introduced during the process of stand conversion with a use of artificial gaps
    Autorzy:
    Zachara, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1291881.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    grunty porolne
    hodowla lasu
    odnowienia lasu
    sosna zwyczajna
    Pinus sylvestris
    huba korzeni
    przebudowa drzewostanow
    luki drzewostanowe
    gatunki domieszkowe
    dab bezszypulkowy
    buk zwyczajny
    lipa drobnolistna
    przebudowa drzewostanu
    dąb bezszypułkowy
    Scots pine
    root-rot fungus
    forest conversion
    sessile oak
    common beech
    small-leaved lime
    Opis:
    This paper presents results on the restoration of Scots pine stands established on post-agricultural lands undergoing conversion into mixed stands. Sessile oak (Quercus petraea), common beech (Fagus sylvatica) and small-leaved lime (Tilia cordata) seedlings were planted in artificially created gaps (0,02 ha to 0,05 ha each) cut in six experimental plots (Forest Districts: Bielsk, Krynki, Sobibór, Dobieszyn, Skrwilno and Łupawa) located in 20–25-years-old pine stands. The experimental plots were spread across northern, central and eastern Poland and affected by root-rot fungus (Heterobasidion annosum). Nine years after planting, the number of individual trees and shrub species, their height sum and average height were calculated for fenced artificial gaps (LSO) as well as non-fenced artificial gaps (LSN) and compared to natural gaps (LN) and non-disturbed neighboring stands (D). Results were calculated separately for the planted species (oak, lime and beech) but combined for all other species. The results indicate satisfactory restoration in all of the investigated plots except in Krynki, which is located in a relatively poor site. Significant differences appeared between height sum as well as average height of planted species in fenced compared to non-fenced gaps. Furthermore, in both, natural and artificial gaps, the species composition of the young generation was enriched with natural regeneration of pioneer species, mainly silver birch (Betula pendula), rowan (Sorbus aucuparia) and aspen (Populus tremula).
    Źródło:
    Leśne Prace Badawcze; 2019, 80, 4
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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