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Wyszukujesz frazę "Ukalska, J." wg kryterium: Autor

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    Wyświetlanie 1-2 z 2
    Tytuł:
    Hipotetyczna gotowość finansowania publicznych funkcji lasu i gospodarki leśnej
    Hypothetical readiness for financing the most important public functions of forest and forest management
    Autorzy:
    Gołos, P.
    Ukalska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/989519.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lasy
    gospodarka lesna
    funkcje lasu
    funkcje publiczne
    funkcje turystyczne
    funkcje wypoczynkowe
    hipotetyczna gotowosc finansowania
    badania ankietowe
    contingent valuation
    leisure−related functions of forest
    logistic regression
    Opis:
    The purpose of the research was to determine the impact of selected sociological factors related to the readiness for hypothetical financing the most important public functions of forest and forest management (WTP, willingness to pay). In direct surveys carried out in August 2008 by the nationwide research center on representative random sample of 500 residents of Warsaw we used the contingent valuation method (CVM) format of questions with a debit card. The result of determining the values of forest and forest management public benefits with the CVM method (set of values WTP>0 [PLN/year/household]) was analyzed via logistic regression, in which a dependency between the fact of declaring the value WTP>0 (1 – WTP>0 declaration, 0 – WTP=0 declaration) and the selected groups of explanatory variables was assessed. The division of explanatory variables into groups resulted from the survey structure and content of questions, related to different aspects of leisure related forest management. The significance of variables in analyzed regression models was investigated with the maximum likelihood method using Wald's chi−square statistic for the 3rd type analysis. Wald's confidence intervals were designated for regression coefficients in exponential scale, and in order to facilitate the interpretation of results, odds ratios were determined. The logistic regression was performed in SAS 9.3 program with the LOGISTIC procedure. The probability of WTP>0 declaration increased among respondents, who indicated: a) peace and quiet as elements which decide of tourist attractiveness of forests; b) car parks as missing elements; c) that they do not feel well in forests with unsightly tree stand; and d) that they relax better in forests where there are shelters, benches, and roofings.
    Źródło:
    Sylwan; 2016, 160, 07; 597-608
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Konduktometryczna metoda oceny żywotności nasion sosny zwyczajnej (Pinus sylvestris L.) i daglezji zielonej (Pseudotsuga menziesii (Mirb.) Franco)
    Conductivity test for Scots pine (Pinus sylvestris L.) and Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) seeds vitality assessment
    Autorzy:
    Jastrzębowski, S.
    Kantorowicz, W.
    Aniśko, E.
    Ukalska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/988974.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    nasiennictwo
    sosna zwyczajna
    Pinus sylvestris
    daglezja zielona
    Pseudotsuga menziesii
    nasiona
    zywotnosc nasion
    metody oceny
    konduktometria
    vitality class
    electrolyte leakage
    conductometry
    seed
    Opis:
    The level of damage to the cell membranes is a sign of aging of the seeds and a decrease in their viability. Conductometric seed testing method indirectly utilizes uncontrolled leakage of ions from seeds with damaged cell membranes to assess their viability. This involves the use of an electrical conductivity of the aqueous solution, in which seeds are soaked. The research was conducted in the years 2011−2014 and aimed at developing the methodology of evaluation of Scots pine and Douglas fir seeds by conductivity test. The aim of the study was to determine the relationship between electrolyte leakage and germination capacity of Scots pine and Douglas fir seeds. 402 samples of Scots pine seed and 90 specimens of Douglas fir seed from all over Poland were tested. The research material was both freshly harvested and stored. Scots pine seeds were obtained in the years 2008−2014, while Douglas fir – 2003−2013 as well as ones stored in the refrigerator for 15 years. Conductivity test and standard seed germination procedure of the analyzed species were used. For both Scots pine and Douglas fir, we noted that, as the electrolyte leakage rate increased, the germination capacity of the seed decreased. So we decided to test whether the vitality of the seeds was determined by means of a conductivity test. The best−fit regression model was determined and the mean expected germination capacity in the viability classes was calculated. 95% confidence intervals for the regression function were also determined. Evaluation of the viability of the seeds by means of the conductometric method is especially useful for seeds requiring a long stratification period (e.g. Douglas fir to determine the potential loss of their vitality. Although the ISTA seed evaluation rules do not require conductivity test for evaluating the seeds of Scots pine and Douglas fir, it may be applicable in situations where it is necessary to perform a rapid assessment of viability before spring sowing.
    Źródło:
    Sylwan; 2017, 161, 11; 927-934
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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