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    Wyświetlanie 1-14 z 14
    Tytuł:
    Analiza bazy drewna rezonansowego na podstawie dostaw surowca do Zakładów Drzewnych Przemysłu Muzycznego w Jordanowie
    Analysis of the basis of resonance wood on the grounds of supplies of raw material to the Music Industry Plant in Jordanow
    Autorzy:
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/816961.pdf
    Data publikacji:
    1987
    Wydawca:
    Polskie Towarzystwo Leśne
    Źródło:
    Sylwan; 1987, 131, 05
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza częstotliwości występowania wad drewna iglastego na pniu jako uzupełnienie oceny jakości bazy surowcowej
    Analiz chastoty pojavlenija porokov khvojjnojj drevesiny na stvole kak dopolnenie ocenki kachestva syrevojj bazy
    Analysis of frequency cf occurrence of weed-defects in standing coniferous trees as supplement to the evaluation of the quality of raw material basis
    Autorzy:
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/821394.pdf
    Data publikacji:
    1989
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany iglaste
    drzewa iglaste
    drewno iglaste
    wady drewna
    baza surowcowa
    ocena jakosci
    Źródło:
    Sylwan; 1989, 133, 03
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Częstotliwość występowania i struktura rodzajowa wad drewna u głównych gatunków lasotwórczych Beskidu Żywieckiego i Śląskiego w zależności od wysokości nad poziomem morza
    The effect of altitude on the frequency and types of wood defects in major forest tree species in the Beskid Zywiecki and Beskid Slaski Mountains
    Autorzy:
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/973792.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    Abies
    buk
    czynniki siedliska
    Fagus
    Picea
    wady drewna
    wysokosc nad poziomem morza
    Beskid Śląski
    Beskid Żywiecki
    drzewa leśne
    gatunki lasotwórcze
    jodła
    leśnictwo
    świerk
    altitude
    wood defects
    timber quality
    Opis:
    The result of the research carried out in the Beskid Żywiecki and Beskid Śląski Mountains indicated the impact of altitude on certain qualitative properties of spruce, fir and beech timber. Significant differences were noted in the share of trees with defects, as well as in the observed types of wood defects in the examined timber depending on the climate/vegetation zone.
    Źródło:
    Sylwan; 2011, 155, 03; 171-178
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Możliwości porównywania jakości technicznej drzewostanów różnych faz rozwoju
    Vozmozhnost sravnenija tekhnicheskogo kachestva nasazhdenijj raznykh faz razvitija
    Possibilities of comparison of technical quality of stands in different development stages
    Autorzy:
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/824517.pdf
    Data publikacji:
    1988
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany
    fazy rozwojowe
    drzewa lesne
    jakosc techniczna
    analiza porownawcza
    Źródło:
    Sylwan; 1988, 132, 11-12
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wybranych środków zrywkowych na uszkodzenia gleby w rębnych drzewostanach bukowo - jodłowych
    The impact of selected skidding techniques on soil damage in beech-fir timber stands
    Autorzy:
    Kulak, D.
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013081.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    gleby lesne
    warstwa wierzchnia
    oddzialywanie na glebe
    zrywka drewna
    uszkodzenia gleby
    drzewostany bukowo-jodlowe
    lesnictwo
    skidery
    zrywka ciagnikiem
    zrywka konna
    skidding
    soil damage
    horse
    skidder
    farm tractor
    Opis:
    The extent and structure of topsoil damage caused by different skidding techniques, like horse, skidder and farm tractor operating together, were determined. The research was carried out during the final cuts in the beech−fir stands situated in the foothill zone. The smallest extent of damage was caused by horse skidding (15% of stand area), while the largest – by skidder (18%). At the same time, the highest volume of disturbed soil (40 m3/ha) characterised horse skidding while the lowest (30 m3/ha) was observed when all the three skidding techniques were used. Analysis of the dimensions (area and volume) of single soil disturbances showed the smallest damage caused by skidder. The larger area and volume of disturbed soil was characteristic for the joint use of the three different skidding techniques. The research showed that soil damage caused by horse skidding was twice less likely than if skidder was used and over 2.5 times more probable if skidding was performed by several techniques.
    Źródło:
    Sylwan; 2008, 152, 12; 20-28
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Udostępnienie lasów do zbioru płodów runa leśnego w świetle przepisów i zwyczajów niektórych krajów Europy
    Forest availability for the harvesting of forest by−products in the light of regulations and traditions of the selected European countries
    Autorzy:
    Barszcz, A
    Sisak, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1026353.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    uboczne uzytkowanie lasu
    runo lesne
    przepisy prawne
    lesnictwo
    zbior
    Polska
    Europa
    forest accessibility
    non−wood forest products
    harvesting
    Opis:
    The paper is a review of regulations and principles concerning forests availability for the harvesting of non−wood forest products. The approach to this issue in the European countries is not uniform; account is taken of nature conservation, an interest of forest owners or local communities and sanctioned tradition. The need for the studies on the resources and control of harvesting volume are underlined.
    Źródło:
    Sylwan; 2003, 147, 03; 89-93
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Znaczenie wspolczynnika zmiennosci w okreslaniu jakosci surowca drzewnego
    Autorzy:
    Barszcz, A
    Rutkowska, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/819428.pdf
    Data publikacji:
    1999
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    surowce drzewne
    drzewostany swierkowe
    drewno swierkowe
    lesnictwo
    wspolczynnik zmiennosci
    jakosc
    pomiary
    wady drewna
    Źródło:
    Sylwan; 1999, 143, 07; 45-55
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność wybranych cech makrostruktury i gęstości drewna świerkowego (Picea abies (L.) Karst.) pochodzącego z drzewostanów rosnących na różnych siedliskowych typach lasu
    Variability of selected features of macrostructure and density of Norway spruce wood (Picea abies (L.) Karst.) from stands growing in different forest habitats
    Autorzy:
    Michalec, K.
    Wasik, R.
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/979499.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany rebne
    swierk pospolity
    Picea abies
    drewno swierkowe
    makrostruktura
    sloje przyrostu rocznego
    szerokosc
    gestosc drewna
    czynniki siedliska
    typy siedliskowe lasu
    common beech
    provenance
    variability
    silvicultural value
    Opis:
    This paper presents the genetic variability in the growth parameters and morphological traits, as well as the silvicultural quality of progeny of 23 European beech (Fagus sylvatica L.) provenances from south−eastern Poland. The research was conducted on the experimental plot established in the Łosie Forest District in spring 2006. After 10 years, during the spring and autumn, we determined and measured the spring phenology and survival rate, the diameter at breast height (dbh), the tree height, and the straightness of trunk. The results obtained point out the considerable variability of analysed features, both within and between different beech populations (tab.). Highest and lowest survival rates are noted for the beeches from Lutowiska and Leżajsk (populations 451 and 461), respectively (fig. 2). Lowest mean height and dbh were achieved by beeches from Bircza (453), while the tallest and broadest trees were from the Kielce population (390) (fig. 3−4). The overall silvicultural assessment based on survival, height, dbh, spring phenological phases and straightness of the trunk revealed that the most valuable populations of beech are those originating from Kielce (390), Bircza (454), Strzyżów (459), Lesko (452), Rymanów (457) and Lutowiska (451). In turn, the analysis resulted in least favourable assessments for beeches from Bircza (453) and Gromnik (362). Thus, we confirmed also that trees of local origin are not always best−adapted to (and do not always grow best in) the place they originate from. The obtained results are highly relevant from the principles of creating the seed source regions for beech in Poland, as the proper selection of a population for the given place of growth may yield benefits for forest ecology and management.
    Źródło:
    Sylwan; 2019, 163, 03; 188-197
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność wybranych cech makrostruktury i gęstości drewna świerkowego (Picea abies (L.) Karst.) z regla dolnego i górnego
    Variability of selected macrostructural features and density of Picea abies (L.) Karst. wood from lower and upper subalpine forest zones
    Autorzy:
    Michalec, K.
    Wąsik, R.
    Barszcz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989498.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wysokosc nad poziomem morza
    lesnictwo
    lasy gorskie
    regiel gorny
    regiel dolny
    drzewa lesne
    swierk pospolity
    Picea abies
    drewno swierkowe
    drewno pozne
    gestosc drewna
    sloje przyrostu rocznego
    szerokosc
    czynniki siedliska
    tree−ring width
    latewood share
    height above mean sea level
    Opis:
    The paper compares the properties of Norway spruce (Picea abies (L.) Karst.) wood from stands growing in the lower and upper subalpine forest zone in terms of the tree−ring width, the share of latewood and the wood density. The investigation concerned material originating from plots established within the boundaries of the south−western incidence of spruce in Poland. Plots were located in the Sudety Mts. and in the Carpathians (tab. 1). On each plot fifteen Norway spruces were chosen and increment cores were sampled using the Pressler borer. The surface of the cores was smoothed and the tree−ring width was measured. The latewood zones were determined and the share of latewood was calculated. Then, the cores were divided into 2 cm sections, for which the relative wood density was determined. Tree−rings were wider in trees growing in the lower when compared with those from the upper subalpine forest zone (tab. 2). Weak negative correlation was revealed between the elevation and the tree−ring width (r=–0.308). The latewood share was slightly higher in trees from the upper than those from the lower subalpine forest zone (tab. 2). However, no statistically significant correlation between the latewood share and elevation was recorded. The wood density was slightly lower in trees from the lower than those from the upper subalpine forest zone (tab. 2), but the difference was not statistically significant. The correlation between the wood density and the elevation turned out to be insignificant.
    Źródło:
    Sylwan; 2016, 160, 10; 855-860
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ zanieczyszczeń przemysłowych na zawartość olejków eterycznych i witaminy C w cetynie i igliwiu sosny zwyczajnej
    Influence of industrial pollution on the content of essential oils and vitamin C in twigs and needles of Scots pine
    Autorzy:
    Michalec, K.
    Barszcz, A.
    Wąsik, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/989821.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    cetyna sosnowa
    igliwie sosnowe
    zawartosc olejkow eterycznych
    zawartosc witaminy C
    zanieczyszczenia przemyslowe
    tillman method
    deryng method
    active substances
    zones of industrial damages
    Opis:
    The paper concerns the impact of air pollution on the content of essential oils in Scots pine twigs and vitamin C in Scots pine needles. The material used for examination of essential oils content was obtained from two locations: area within the former Aluminium Smelter in Skawina, the other sample was collected in the territory of Rudnik Forest District (southern Poland). Cetin was obtained manually from standing or felled trees. Essential oils content was determined by means of Deryng apparatus. The material used for examination of vitamin C content came from three locations: Chrzanów Forest District, Dąbrowa Tarnowska Forest Distric and the Special Economic Zone located in the area of Mielec Forest District (southern Poland). Vitamin C content in pine needles was determined by Tillman method. The content of essential oils in pine twigs in stands under smaller influence of air pollution was nearly twice the amount in twigs coming from stands under greater influence of this factor. In less polluted stands the content of essential oils in twigs increased as they grew older, whereas, in stands being more exposed to industrial influence the opposite tendency was observed. We recorded that the amount of vitamin C in pine needles coming from stands under greater influence of industry was by ca. 30% smaller than in the material collected from stands less affected by industrial pollution. In both groups of the stands, the highest content of vitamin C was detected in needles from the youngest (age class I) as well as the oldest (age class V) stands. The content of essential oils in twigs as well as vitamin C in pine needles may be considered as the indicator of the environmental pollution degree.
    Źródło:
    Sylwan; 2015, 159, 06; 516-522
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Klasyfikacja surowca wybranych gatunków według norm polskich i Unii Europejskiej
    Classification of wood of selected tree species according to the Polish and the EU standards
    Autorzy:
    Michalec, K.
    Wąsik, K.
    Barszcz, A.
    Groń, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/989278.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    surowce drzewne
    drewno bukowe
    drewno debowe
    drewno jodlowe
    drewno swierkowe
    wady drewna
    jakosc drewna
    klasyfikacja drewna
    normy unijne
    normy polskie
    raw wood
    wood defects
    wood value
    softwood
    hardwood
    Opis:
    The aim of this paper was to perform a comparative analysis of the quality and the value of beech, oak, fir and spruce wood classified according to the Polish and the EU standards. The research was carried out in Lesko and Baligród forest districts (south−eastern Poland). The measurements of the investigated raw wood were taken at the upper landings. With regard to fir, spruce and beech 50 specimens per species were measured, while in the case of oak only 25 pieces were examined. Each specimen was classified in respect of its quality and size according to the Polish standards (PN) and the European Union (PN−EN) standards. Then, the results of both classifications were compared in terms of the share of volumes of particular wood quality classes, the impact of wood defects on the raw wood classification results, and the value of wood determined by the means of both standards. With regard to the beech wood, the share of the poorest class D upon applying PN−EN was smaller than that for PN norms. This decrease was in favour of other classes, due to which the value of the entire beech wood increased by ca. 16%, when classified with the use of the EU standards. The oak wood revealed a slight increase in the share of wood volume in the class C and a decrease in the class D of PN−EN when compared with the Polish norms. The value of the oak wood classified with the use of the EU standards was merely by 2.3% higher than that of the Polish norms. With regard to the softwood (fir and spruce), a decrease in the share of wood of the class C in PN−EN was recorded, which was in favour of the classes B and D. The value of raw wood classified by means of the EU standards was lower for both of the coniferous species. The decrease for fir accounted for 13.3%, while for spruce it was only 1.5%. For the evaluation of the softwood, Polish classification was more profitable, whereas for hardwood the EU standards were more favourable.
    Źródło:
    Sylwan; 2016, 160, 06; 459-465
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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