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Wyszukujesz frazę "Šiška, Bernard" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Variation of spring phenological phases and airborne pollen grains of the european hazel (corylus avellana l.) in the Zvolen Basin (Slovakia) as influenced by meteorological factors
Autorzy:
Skvareninova, Jana
Bencatova, Blazena
Skvarenina, Jaroslav
Siska, Bernard
Hribik, Matus
Laffersova, Janka
Powiązania:
https://bibliotekanauki.pl/articles/634124.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Opis:
The impact of air temperature on the formation of generative organs of the European hazel (Corylus avellana L.) and the onsets of related phenophases during the years 1987-2009 in Central Slovakia (the Zvolen basin) are analyzed in this paper. The analyses are based on the records of 10% and full onset of catkins lenghtening, inflorescence emergence and flowering. Catkins lengthening was observed on February 7th and lasted 10 days on average, inflorescence emergence on February 20th and 8 days and flowering on March 2nd and 6 days. The earliest dates of phenophases onsets were observed in 2007, while the latest in 1987 and 2005. A large variability of daily mean air temperatures in different years resulted also in a high variability of phenophases onsets (sx% 27.3-35.3). The onsets of spring phenophases earlier by 2.5-5.5 days were recorded at the end of the evaluated period of years as compared with the beginning. The concentration of pollen grains captured with a Burkard volumetric rotate pollen trap culminated approximately 10 days after flowering. The peak pollen grain concentration varied in a range of 50-500 pollen grains per m3. The peaks of pollen grains concentrations in the Zvolen Basin were influenced, apart from the flowering of the European hazel also by the transport of pollen grains from higher mountainous habitats especially in the late pollen season.
Źródło:
Prace Geograficzne; 2011, 126
1644-3586
Pojawia się w:
Prace Geograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grape Quality Parameters in Western Carpathian Region under Changing Climatic Conditions as Influenced by Drought
Autorzy:
Bernáth, Slavko
Šiška, Bernard
Paulen, Oleg
Zuzulová, Veronika
Pintér, Eduard
Žilinský, Matej
Tóth, František
Powiązania:
https://bibliotekanauki.pl/articles/123668.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
drought
grape
acid content
sugar content
Opis:
Western Carpathians are historically the northern range traditional grapevine growing areas since the Middle Ages. The mean anual temperature has increased by about 1.1°C during the last century in Slovakia. Elevated temperature impacted the growing conditions of grapevine. Together with the increased temperatures, higher frequency of drought periods and parameters are evident. Traditional grape producing areas are facing new challenges. Except for the accelerated grapevine phenology, pathogene infection pressure and occurence of pests including new ones, as well as the quality of grapes influencing wine quality, are changing. In order to evaluate the drought impact on the quality parameters of grapes the locality of the Cultivar Testing Station in Dolné Plachtince which belongs to the Central Slovakian grape producing region was chosen. Interanual variability of the drought impact on the grape quality was evaluated according to Palmer drought severity index (PDSI). The 1990-2014 period was used as a basis for evaluation. The period with the phenological phase crucial for the grape quality formation was determined. Two groups of cultivars with different ripening periods were selected. Pinot Gris, Muscat Ottonel Weiss, Müller Thurgau represented the early ripening cultivars (OIV earliness code 4 and 5), whereas Grüner Veltliner, Riesling, Welschriesling represented the late ripening cultivars (OIV code 8 and 9) were used. The cumulative values of PDSI for the crucial periods were calculated. The PDSI values as well as the sugar and acid contents were correlated to find the strength of relation between them. Short drought periods did not influence the grape quality significantly, while long drought periods caused a decrease of the acid content and an increase of the sugar content. Though the tendency was clear, the correlation level was mostly low. The most sensitive period in this sense was July-September; however, it was influenced by the ripening term of individual cultivars. The results suggest the necessity of a thorough approach to cultivar selection, taking into account its vitality and ability to preserve a satisfactory acid content in grapes by the harvest date.
Źródło:
Journal of Ecological Engineering; 2020, 21, 4; 39-45
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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