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    Wyświetlanie 1-8 z 8
    Tytuł:
    Mrozoodpornosc spoistego podloza drog lesnych stabilizowanego wapnem hydratyzowanym
    Autorzy:
    Szewczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/819080.pdf
    Data publikacji:
    1998
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    inzynieria lesna
    stabilizatory
    mrozoodpornosc
    lesnictwo
    drogi lesne
    podloza spoiste
    wapno hydratyzowane
    Źródło:
    Sylwan; 1998, 142, 04; 61-71
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wplyw trofizmu i wilgotnosci siedliska na wzrost i pokroj sosen i debow w Puszczy Niepolomickiej
    Autorzy:
    Szwagrzyk, J.
    Szewczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/821894.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    pokroj
    wzrost roslin
    czynniki troficzne
    czynniki siedliska
    Quercus robur
    sosna zwyczajna
    Puszcza Niepolomicka
    lesnictwo
    dab szypulkowy
    Pinus sylvestris
    drzewa lesne
    Źródło:
    Sylwan; 2002, 146, 12; 23-38
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Skład gatunkowy, wzniesienie nad poziomem morza i kategoria ochrony jako czynniki wpływające na intensywność zgryzania odnowień w Tatrzańskim Parku Narodowym
    Species composition, elevation, and former management type affect browsing pressure on forest regeneration in the Tatra National Park
    Autorzy:
    Bodziarczyk, J.
    Zwijacz-Kozica, T.
    Gazda, A.
    Szewczyk, J.
    Fraczek, M.
    Zieba, A.
    Szwagrzyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/45542.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    lowiectwo
    lasy gorskie
    odnowienia lasu
    naloty
    podrost
    gatunki roslin
    Sorbus aucuparia
    Salix caprea
    Abies alba
    Acer pseudoplatanus
    wysokosc nad poziomem morza
    ssaki kopytne
    szkody lowieckie
    zgryzanie
    obszary chronione
    Tatrzanski Park Narodowy
    stale powierzchnie obserwacyjne
    Opis:
    Effects of ungulate pressure on the development of young generation of trees is one of the most important issues in ecology and forestry. Ungulate pressure influence on the development of natural regeneration has been also reported from several national parks. Our study on the effects of ungulate browsing on the young generation of trees was conducted on more than 500 sample plots controlled during one growing season. The overall browsing pressure ranged from 7.6% in seedlings to 20.3% in low saplings. The pressure of ungulates on the regeneration of Picea abies, the dominant species in the Tatra National Park, was by and large below 1%. Broadleaved species were browsed more frequently. The relationship between the plot altitudes and browsing intensity was statistically significant for seedlings and low saplings; at the higher altitudes, the browsing pressure was greater. There was also observed a statistically significant relationship between the type of former management and the browsing degree in seedlings; in the areas subjected to “landscape protection”, the intensity of browsing was higher when compared to strictly protected areas. Pressure exerted by ungulates on tree regeneration was very unevenly distributed, i.e. some plots were heavily browsed and many others - not browsed at all. The most affected tree species were Salix caprea and Sorbus aucuparia, although the percentage of browsed individuals rarely exceeded 50%. Other species favored by ungulates was Acer pseudoplatanus; despite the high browsing pressure, this species was present among seedlings and tall saplings, suggesting that it would be able to recruit to the tree layer. Abies alba was browsed less frequently than the deciduous trees; however, among the tall saplings it was the third most browsed species.
    Źródło:
    Leśne Prace Badawcze; 2017, 78, 3
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pracochlonnosc pozyskiwania drewna w drzewostanach ze sniegolomami
    Labour consumption during timber harvesting in snowbreak stands
    Autorzy:
    Sowa, J.M.
    Szewczyk, G.
    Stanczykiewicz, A.
    Grzebieniowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/45878.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewostany uszkodzone
    sniegolomy
    pozyskiwanie drewna
    trzebiez pozna
    pracochlonnosc
    Źródło:
    Leśne Prace Badawcze; 2009, 70, 4; 429-434
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Liczebność i rozmieszczenie głuszca w Polsce w XXI wieku
    Population size and distribution of the capercaillie in Poland in the 21st century
    Autorzy:
    Zawadzka, D.
    Żurek, Z.
    Armatys, P.
    Stachyra, P.
    Szewczyk, P.
    Korga, M.
    Merta, D.
    Kobielski, J.
    Kmieć, M.
    Pregler, B.
    Krzan, P.
    Rzońca, Z.
    Zawadzki, G.
    Zawadzki, J.
    Sołtys, B.
    Bielański, J.
    Czaja, J.
    Flis-Martyniuk, E.
    Wediuk, A.
    Rutkowski, R.
    Krzywiński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/980118.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    ptaki lowne
    gatunki chronione
    gluszec
    Tetrao urogallus
    wystepowanie
    liczebnosc populacji
    rozmieszczenie przestrzenne
    Polska
    wiek XXI
    tetrao urogallus
    species distribution
    species abundance
    refuges
    poland
    Opis:
    The data on the distribution and number of the capercaillie Tetrao urogallus in Poland for the period from the end of the 20th century up to 2017−2018 is presented. The capercaillie is a sedentary forest grouse living in old mountain forests and within the boreal zone. Since more than a century, the decrease in the numbers of the species has been observed, interlinked with the extinction of isolated populations. Within the present borders of Poland, a 1925 questionnaire study noted 2200−2700 individuals. In the 1960s, the national population was estimated at 1700−2000 birds, living in five isolated populations. In 1985−1995, the population numbers of the capercaillie dropped to approx. 466−700 individuals in four regions, and in 2000 it was estimated at 470−570 birds. According to the results of the censuses performed in 2017−2018, the size of the capercaillie population risen to 523−631 individuals and 59−69 lekking grounds. Currently the capercaillie occurs in four isolated regions. These are the Western Carpathians (the Beskid Sądecki, Tatry, Gorce, Babia Góra, Beskid Żywiecki, and the Beskid Śląski ranges) where 284−326 individuals live and 35−41 leks are active. In the Solska and the Lasy Janowskie Forests (Lublin region), the population was estimated at 132−184 individuals and 12−13 lekking grounds. In the Augu− stów Forest (Podlasie region) 36−46 individuals and 5−7 leks were found. In the Bory Dolnośląskie Forest, where native capercaillies got extinct during the last decade, the reintroduction program resulted in the rebuilding of their 65−75 population (with 6−7 leks). The restitution of the species in the Piska Forest has begun. During the last 20 years, populations in the Carpathian national parks have been stable, although fluctuating in numbers. The increase in the number of individuals in the Augustów Forest as well as in the Sądecki and Beskid Śląski Mountains is an after−effect of the release of birds from breeding centers or translocations. In other strongholds, fluctuations or decreases have been recorded, including wisible in the Beskid Żywiecki Mountains.
    Źródło:
    Sylwan; 2019, 163, 09; 773-783
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Występowanie Erysiphe alphitoides w drzewostanach dębowych dotkniętych klęską powodzi
    Occurence of Erysiphe alphitoides in oak stands affected by flood disaster
    Autorzy:
    Szewczyk, W.
    Kumiński, R.
    Mańka, M.
    Kwaśna, H.
    Łakomy, P.
    Baranowska-Wasilewska, M.
    Behnke-Borowczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1312378.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    drzewostany debowe
    drzewostany pokleskowe
    drzewostany popowodziowe
    dab szypulkowy
    Quercus robur
    choroby aparatu asymilacyjnego
    maczniak prawdziwy debu
    Erysiphe alphitoides
    wystepowanie
    defoliacja
    zamieranie drzew
    Nadlesnictwo Wolow
    defoliation
    branch tip withering
    oak decline
    Forest District Wołów
    Opis:
    Pedunculate oak (Quercus robur L.) is the most valuable deciduous tree species in Poland. For almost 30 years, an oak decline resulting from stress factors leading to a decrease of tree vitality in the long-term has been observed. The aim of the present study was to determine the proportion of leaves infected by the fungus Erysiphe alphitoides, the cause of powdery mildew, in post-flood oak stands situated in the Forest District Wołów (51°32’N, 16°62’E) as well as to evaluate effects of powdery mildew with respect to the oak decline. In order to record the powdery mildew incidence, we selected three trees in each of the ten investigated oak stands, and 200 leaves were collected from the upper part of the crowns. The percentage of infected leaves as well as the reduction of carbon assimilation capacity was assessed. Furthermore, we evaluated the average reduction of carbon assimilation capacity and the percentage of withering branch tips in 25 adjacent trees. Incidences of powdery mildew were observed in seven out of the ten stands. The maximum tree damage did not exceed 22% leaf infection and mean defoliation within the study areas ranged from 18% to 61.4%. Non-withering branch tips were observed in one post-flood area as well as in one area situated outside the flooded region. Within the remaining areas studied, the average proportion of withering branch tips ranged from 0.4% to 13.8%. Statistical analyses showed that differences between the investigated stands with regard to the rate of powdery mildew occurrence were not significant. Correlating the means, however, revealed a relationship between powdery mildew incidence and branch tip withering. This relationship is a possible indication of the ongoing oak dieback. No statistically significant relationship between tree defoliation and powdery mildew incidence was found. The lack of statistical significance, as observed here, implies that water stagnation within the investigated stands had no effect on Erysiphe alphitoides infection.
    Źródło:
    Leśne Prace Badawcze; 2015, 76, 1; 73-77
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gatunki Phytophthora i Pythium w glebie i w korzeniach dębu szypułkowego na terenach popowodziowych w Nadleśnictwie Wołów
    Phytophthora and Pythium species in soils and in roots of the pedunculate oaks in periodically flooded areas in Wolow Forest District
    Autorzy:
    Kwaśna, H.
    Szewczyk, W.
    Behnke-Borowczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989782.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    tereny pokleskowe
    tereny popowodziowe
    drzewostany debowe
    drzewa lesne
    dab szypulkowy
    Quercus robur
    korzenie
    gleby lesne
    grzyby
    Phytophthora
    Phytium
    wystepowanie
    Nadlesnictwo Wolow
    pedunculate oak
    fungi
    globisporangium
    oomycota
    flood
    phytophthora
    pythium
    Opis:
    Phytophthora and Pythium species (Oomycota) are known to be serious pathogens of forest trees. Little is known, however, about their presence in Polish oak forests and their role in the oak decline, especially in the flooded areas. The aim of this study was (1) to detect and compare populations of microorganisms from Oomycota and fungi in roots and soil of healthy and declining pedunculate 30−126 years old oak stands, which had been flooded by the Odra River for three months in 1997 and one month in 2010, (2) to demonstrate the relationship between different chemical factors of soil and the occurrence of microorganisms, and (3) to assess the contribution of Oomycota to oak decline. Study was carried out in Wołów Forest District (south−western Poland). Microorganisms were isolated from fine (1−5 mm in diameter) roots and non−rhizosphere soil collected from 0−50 cm horizon. Isolation procedure from roots included surface sterilization and plating the root segments on the nutrient agar. An oak leaf baiting method was used for isolation of Oomycota from soil. Identification of microorganisms was based on morphology and sequencing of the ITS1/2 rDNA. Oomycota was represented by: Globisporangium, Phytophthora and Pythium and fungi mostly by: Aspergillus, Chaetosphaeria, Cylindrocarpon, Mortierella, Mucor, Penicillium, Trichoderma and Umbelopsis. Globisporangium attrantheridium (syn. Pythium attrantheridium) occurred locally and was found in roots of only one flooded oak. This is the first record of this species on oak and in Poland. G. intermedium, P. gibbosa/P. gregata, P. plurivora and Pythium sp. were found in soil of flooded and non−flooded (control) oak stands. The organisms occurred in podzolized brown soils, brown alluvial soils and gley soils that had most nitrogen (21−60 mg/kg), various amounts of calcium (61.1−347.6 mg/100g) and moderate acidity (pH=3.85−4.2). There was often a significant association between exposure to flood and the health status of oak trees assessed by the scale of defoliation. Oomycota seemed to be only moderately associated with increased tree defoliation as a symptom of oak decline.
    Źródło:
    Sylwan; 2015, 159, 07; 531-539
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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