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    Wyświetlanie 1-7 z 7
    Tytuł:
    Wiek a defoliacja koron sosny zwyczajnej (Pinus sylvestris L.) wybranych klas biosocjalnych
    Age and crown defoliation of Scots pine trees [Pinus sylvestris L.] of selected biosocial classes
    Autorzy:
    Jaszczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1017728.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    defoliacja
    klasy Krafta
    wiek drzew
    sosna zwyczajna
    lesnictwo
    Pinus sylvestris
    drzewa lesne
    defoliation
    scots pine
    age classes
    sub−age classes
    biosocial classes
    Opis:
    In the year 2003, crown defoliation of Scots pines (Pinus sylvestris L.) of the 3rd and 4th age class was assessed on 90 test plots comprising, in each case, 25 trees derived from the main stand. This study comprises analyses and evaluation of the significance of differences of the mean defoliation of tree crowns of different Kraft classes from the same age classes and sub−classes as well as the mean defoliation of tree crowns of the same Kraft classes from different age classes and sub−classes (α=0.05).
    Źródło:
    Sylwan; 2007, 151, 10; 16-24
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wydajność aparatu asymilacyjnego sosny zwyczajnej (Pinus sylvestris L.) różnych klas wieku
    Productivity of the assimilation apparatus of Scots pine (Pinus sylvestris L.) in various age classes
    Autorzy:
    Turski, M.
    Beker, C.
    Jaszczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/989700.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany sosnowe
    klasy wieku
    klasy Krafta
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    aparat asymilacyjny
    wydajnosc aparatu asymilacyjnego
    volume of leaved twigs
    productivity of assimilating apparatus
    age classes
    kraft's classes
    Opis:
    Productivity of the assimilating apparatus is commonly defined as an increment in volume, most typically of the stem or trunk, per unit of crown size. In this paper the productivity of the assimilating organ (CPtwn1) is calculated as a quotient of the average annual increment in stem volume from a 5−year period (iv1) and the volume of twigs with needles (twnv), determined by xylometry methods (fluid displacement method). The experimental material comprised measurements taken on 200 Scots pines (Pinus sylvestris L.) in 8 pure pine stands growing in western Poland (tab. 1). Using the calculated sizes of assimilating apparatus, their arithmetic means and coefficients of variation were calculated for each stand (tab. 2, 3). Additionally, mean crown productivity within each Kraft's class comprising the dominant trees (classes 1, 2 and 3) as well as in the dominated trees (classes 4 and 5) were determined. The strength of the relationship between CPtwn1 and diameter at breast height (d1.3), height (h) and volume of leaved twigs (twnv) was calculated (tab. 4). Moreover, a two−way analysis of variance was conducted to assess the statistical significance of the effect of age of the stand and biosocial class of tree position in the stand (within the dominant trees and the dominated trees) on productivity of the assimilating apparatus. Mean productivity of analysed Scots pine crowns takes the highest values in the youngest stand (0.60 m³), while the lowest – in the oldest stand (0.34 m³). In the youngest, 25−year old pine stand, mean productivity of the assimilating apparatus in trees forming the dominated trees is by 124% greater than that of trees forming the dominant trees. An opposite situation is found in the oldest, 93−year−old stand, where mean productivity of the dominant trees is over 1.5 greater than that recorded in the dominated trees. Statistically significant effect of the stand age on productivity of the assimilating apparatus was observed (tab. 5). However, affiliation of a tree to the dominant or dominated trees does not result in such an effect. On the other hand, there is an interaction between age of the stand and its affiliation to the Kraft's classes. This means that the affiliation of trees to the dominant trees or the dominated trees and its effect on mean productivity of the assimilating apparatus depend on the age of stand.
    Źródło:
    Sylwan; 2015, 159, 01; 36-44
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wskaźnik uszkodzenia koron sosny (Pinus sylvestris L.) III i IV klasy wieku a ustalanie stref uszkodzenia lasu
    Damage index of Pine (Pinus sylvestris L.) crowns of the 3rd and 4th age classes and the determination of forest damage zones
    Autorzy:
    Jaszczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1022788.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    drzewostany sosnowe
    uszkodzenia korony
    klasy wieku
    strefy uszkodzen lasu
    wskaznik uszkodzenia korony
    sosna zwyczajna
    monitoring
    lesnictwo
    Pinus sylvestris
    drzewa lesne
    scots pine
    damage index
    damage zone
    age class
    Opis:
    In years 2002 and 2003, pairs of test plots were established in pine stands of the 3rd and 4th age classes of selected forest divisions. The crown condition of 25 trees from the main stand was assessed on each plot employing the so called stand method. Damage indices were calculated for each test plot, which were used to assign individual stands to the appropriate damage zone. The presence or lack of statistically significant differences of damage indices was checked and this was referred to the membership of individual stand pairs in damage zones. The proportions of damage zones determined according to two divisions for the 3rd, 4th and, jointly, for the 3rd and 4th age classes in both years of observations were compared.
    Źródło:
    Sylwan; 2005, 149, 11; 25-36
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Urządzanie lasu w dobie wyzwań środowiskowych i społecznych - planowanie regionalne
    Forest management in the age of environmental and social challenges - regional planning
    Autorzy:
    Jaszczak, R.
    Bańkowski, J.
    Kowalczyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/978926.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    spatial planning
    Functional Forest Areas
    Regional operational programs
    Opis:
    In the era of sustainable and multifunctional forestry, special efforts should be made to designate areas having the status of (multi)functional forest areas (MFA) and to include them in a special development plans. Their operational goals should be: to increase the acreage, to prevent further fragmentation and to preserve the spatial communication between them. Only such an approach will ensure the relative stability of ecosystems and their protection against anthropogenic degradation. Determining the MFA boundaries would certainly facilitate their space management as well as planning and furnishing activities. People responsible for given spatial units would also be able to determine parities of activities and develop optimal solutions in terms of land development, including the socio−economic development of the region. The concept of MFA delimitation and strengthening is consistent with the EU sustainable development strategy, whose provisions refer to the creation of large−scale natural functional areas. The paper objectives was to discuss the legal status of spatial planning in relation to forests and to propose MFA distinguishing and developing regional operational programs for them. It is urgent and necessary to consider the authorities responsible for forest management (relevant units of the State Forests) as authorized to comment on drafts of conditions and directions of spatial development of municipalities or local and regional spatial development plans. It may improve the effectiveness of spatial planning as one of the instruments for shaping forest resources and forest space in accordance with the principles of permanently sustainable forest management. In the study of conditions and directions of spatial development of the commune, the description of the actual state of the forest space as well as the directions and principles of its shaping should be carried out in a specific standard, in consultation with all units responsible for forest management. Distinguishing Forest Functional Areas may impact the optimization of the costs of forest management and nature protection, because after assigning dominant functions to the distinguished areas, directing financial resources to defined functioning goals will be easier both at the planning stage and during implementation. Verification of the results obtained will also be easier and more transparent. An equally important effect will be to indicate potential conflicts between different expectations from forest management. The characteristics of functional forest areas together with recommendations and suggestions for furnishing works should be provided by Regional Operational Programs, including in their content the assumptions of the region’s spatial development policy, valorization of the forest and assessment of its stability, assumptions for activities related to nature protection and water management, characteristics of climate conditions, optimization of the road network, fire protection, tourist development and forest education, characteristics of the state of forest resources and forecasts of the development of wood resources. An excellent source of information for that purpose is the Forest Data Bank.
    Źródło:
    Sylwan; 2020, 164, 05; 373-383
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Defoliacja górnej części i całej korony drzew sosny zwyczajnej (Pinus sylvestris L.)
    Defoliation of the top part and whole crown of Scots pine [Pinus sylvestris L.]
    Autorzy:
    Jaszczak, R.
    Miotke, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1011971.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    defoliacja
    klasy wieku
    korony drzew
    klasy Krafta
    sosna zwyczajna
    lesnictwo
    Pinus sylvestris
    drzewa lesne
    scots pine
    defoliation
    crown
    biosocial classes
    age classes
    Opis:
    In 2007, crown defoliation of trees was observed in Scots pine stands in the Siemianice Experimental Forest District. The obtained results were used for the analysis of the mean size and variability of the top part and the whole crown of Scots pine in individual experimental plots as well as in the selected age and Kraft’s classes.
    Źródło:
    Sylwan; 2009, 153, 09; 607-616
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Defoliacja koron drzew sosny zwyczajnej (Pinus sylvestris L.) wybranych klas biosocjalnych niezależnie od strefy uszkodzenia, klasy wieku i typu siedliskowego lasu
    Crown defoliation of Scots pine [Pinus sylvestris L.] in selected biosocial classes irrespective of damage zone, age class and forest site type
    Autorzy:
    Jaszczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1012893.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    defoliacja
    korony drzew
    klasy Krafta
    sosna zwyczajna
    lesnictwo
    Pinus sylvestris
    drzewa lesne
    defoliation
    scots pine
    biosocial classes
    Opis:
    The paper presents the results of the investigation of the tree crown defoliation in different Kraft’s classes irrespective of damage zone, age class and forest site type. Biosocial position turned out to be itself a decisive factor influencing the significance of the differences in the mean defoliation of the crowns.
    Źródło:
    Sylwan; 2008, 152, 04; 13-20
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wybrane charakterystyki koron drzew i ich związek z pierśnicą oraz wysokością w drzewostanach sosnowych różnych klas wieku
    Selected features of tree crowns and their relationship with the dbh and height in pine tree-stands of different age classes
    Autorzy:
    Turski, M.
    Jaszczak, R.
    Deus, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1008333.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    dendrometria
    drzewostany sosnowe
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    klasy wieku
    klasy Krafta
    korony drzew
    piersnice drzew
    korelacja cech
    wysokosc drzew
    powierzchnia rzutu korony
    srednica korony
    dlugosc korony
    pine
    crown
    variation
    kraft’s classes
    dominant stand
    Opis:
    The paper discusses the selected crown characteristics of pine trees, their variability and dependence on breast height diameter and height. The analysis relates to the dominant forest stands of different age classes, and the Kraft classes forming them.
    Źródło:
    Sylwan; 2012, 156, 05; 369-378
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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