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    Wyświetlanie 1-4 z 4
    Tytuł:
    Ocena jakości hodowlanej dwuletnich sadzonek sosny zwyczajnej (Pinus sylvestris L.) poddanych sterowanej mikoryzacji
    Assessment of silvicultural quality of two−year−old Scots pine (Pinus sylvestris L.) seedlings under controlled micorrhization
    Autorzy:
    Aleksandrowicz-Trzcińska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026529.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    sadzonki dwuletnie
    opor elektryczny
    tkanki przykambialne
    sadzonki mikoryzowane
    jakosc hodowlana
    sosna zwyczajna
    lesnictwo
    stopien zmikoryzowania
    Pinus sylvestris
    drzewa lesne
    pine seedlings
    silvicultural quality
    biometric parameters
    micorrhizal colonisation
    electrical impedance
    Opis:
    Three methods were used to assess silvicultural quality of two−year−old Scots pine (Pinus sylvestris L.). The assessment was based on measurements of biometric parameters, colonisation level of micorrhizas and electrical impedance of cambial tissues of shoots. The applicability of these methods with special reference to micorrhizal colonisation and impedance methods, which so far were not used in the assessment of the planting material, was analysed.
    Źródło:
    Sylwan; 2003, 147, 02; 49-57
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Jakość hodowlana buka zwyczajnego (Fagus sylvatica L.) po 20 latach wzrostu na powierzchni proweniencyjnej w Nadleśnictwie Brzeziny
    Silvicultural quality of common beeches (Fagus sylvatica L.) after 20 years of growth on a provenance plot in Brzeziny Forest District
    Autorzy:
    Szeligowski, H.
    Buraczyk, W.
    Drozdowski, S.
    Andrzejczyk, T.
    Stępniarek, M.
    Dzwonkowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/980226.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewa lesne
    buk zwyczajny
    Fagus sylvatica
    jakosc hodowlana
    wzrost roslin
    pokroj
    doswiadczenia proweniencyjne
    Nadlesnictwo Brzeziny
    provenance plots
    growth traits of trees
    tree habit
    silvicultural quality
    Opis:
    Paper presents an analysis of phenotypical variation and an evaluation of silvicultural quality of progeny from 27 beech stands around Poland that grow on the provenance plot in the Brzeziny Forest District (51.791997°N, 19.813841°E). The trial commenced in spring 1996, on the basis of 2−year−old saplings with covered root systems. A randomised block method with 3 replications was applied, with subsequent measurements and analyses carried out in 2015, following 20 years of growth. The considered features included height, breast−height diameter, crown habit, trunk curvature and height of branching. Single−factor analysis of variance and Tukey’s HSD test were applied to determine the significance of differences among provenances. The largest mean height was attained by beeches originating from Gdańsk, Szczecinek and Bierzwnik. The least−tall beeches were in turn those whose origins were in Tomaszów, Łagów and Grodzisk. The greatest intra−population variation in height characterised the beeches from Gryfino and Krucz, while the most limited variation was noted for Gdańsk population. The beeches of greatest girth were again those deriving from Gdańsk, Bierzwnik and Szczecinek populations, as well as the one from Kwidzyn 15. The lowest values for diameter at breast height were again noted for the Grodzisk, Tomaszów and Łagów provenances. Marked intra−population variation in this feature characterised trees from the Gryfino, Bieszczady National Park (42), Zdrojów and Krucz provenances. The populations also differered in relation to analysed more−qualitative features. The group of populations prized most in terms of their overall silvicultural quality included Gryfino, Grodzisk, Zdrojów, Bieszczady National Park, Bierzwnik and Szczecinek provenances. In contrast, only low quality was manifested by beeches from Tomaszów, Rymanów, Wejherowo, Młynary, Golub− −Dobrzyń and Kwidzyn provenances. In general, populations originating from the north (especially Pomerania) achieved better growth and a more favourable quality evaluation than those from the south, and sites located near the range limits of the species (fig. 7). The obtained results show that northern Poland boasts the most plastic populations of beech. Equally, it was not possible to establish that populations of local origin were superior in terms of growth to those originating in more far−flung parts of Poland. Furthermore, assessments of different populations in terms of their growth and quality features often proved highly disparate.
    Źródło:
    Sylwan; 2019, 163, 07; 590-600
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ zagęszczenia na wzrost i jakość hodowlaną sosny w odnowieniach naturalnych
    Effect of density on growth and silvicultural value of Scots pine in natural regeneration
    Autorzy:
    Tarasiuk, S.
    Kopeć, K.
    Drozdowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/973324.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    hodowla lasu
    odnowienia naturalne
    naloty
    sosna zwyczajna
    Pinus sylvestris
    leśnictwo
    młodniki
    wzrost roślin
    zagęszczenie drzew
    przyrost wysokości
    jakość hodowlana
    scots pine
    natural regeneration
    stand tending
    tree height
    silvicultural quality
    biotic and abiotic damage
    Opis:
    The paper was aimed at determination of the effect of different tree density in the naturally regenerated monotypic and even aged young Scots pine stands growing in the fresh coniferous or mixed fresh coniferous forest sites on their further development. Research was carried out in Nowa Dęba Forest District (south−eastern Poland). A total of 12 research plots (160×40 m) were established in the selected stands. Plots were divided into 4 equal square pieces (40×40 m), where different methods of tending were applied (variant A – control, variant B – thinned, leaving 16 thousand trees/ha, variant C – thinned, leaving 10 thousand trees/ha, variant D – thinned, leaving 6 thousand trees/ha). The thinning was carried out in April 2007. In subsequent years (2007−2010), selected elements of stand structure like: height, height increment, density and damage resulting from abiotic and biotic factors were determined. Tree density significantly influenced both height increment and qualitative (tree shape) characteristics of naturally regenerated young pine trees. In the course of early thinnings, the number of trees needs to be reduced approximately down to the 10−16 th. stems/ha in the first stage of growth (seedlings), and further down to about 6 th./ha in the coppice stage. Such density enhances the chance of good growth and silvicultural quality of the stand. Noteworthy, even the heavy thinning does not significantly impact the actual proportion of both biotic (e.g. ungulate browsing) and abiotic (e.g. heavy snow) damage in the young naturally regenerated Scots pine forest stands.
    Źródło:
    Sylwan; 2015, 159, 12; 989-996
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność, jakość hodowlana i właściwości fizyczno-mechaniczne drewna trzech pochodzeń buka
    Autorzy:
    Tarasiuk, S.
    Jednoralski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022150.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wlasciwosci mechaniczne
    drewno bukowe
    jakosc technologiczna
    buk zwyczajny
    zmiennosc proweniencyjna
    proweniencje
    hodowla lasu
    wlasciwosci fizyczne
    jakosc hodowlana
    lesnictwo
    Fagus sylvatica
    drzewa lesne
    european beech
    silvicultural quality
    technical quality of wood
    provenances
    seed zones
    populational
    tree improvement
    intraspecific variability
    Opis:
    This paper reports 45 years of study on a provenance trail of European beech planted in the Rogów Experimental Forest in central Poland (190 m a.s.l.). Survival, growth and crown shape are analyzed in unthinned till the age of 40 years 3 provenances. The response to the thinning, and selected physico−mechanical properties of wood are analyzed. It is concluded that the poor quality and scarcely distributed local populations of beech is in many respects over−competed by the coastal beech provenance.
    Źródło:
    Sylwan; 2005, 149, 03; 42-49
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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