Przeglądaj wg Autor "Mikiciuk, Grzegorz"

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  • Miniatura
    PozycjaOpen Access
    Effect of preharvest use of anti-cracking preparations on changes in selected parameters of sweet cherry fruits during frozen storage
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2016) Telesiński, Arkadiusz; Mikiciuk, Grzegorz; Mikiciuk, Małgorzata; Stręk, Michał; Płatkowski, Maciej; Statkiewicz, Małgorzata; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology Szczecin; Department of Horticulture, West Pomeranian University of Technology, Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology Szczecin; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology Szczecin
    This paper presents the study on comparison of the changes of dry weight content, total polyphenols content, total flavonoids content, and antioxidant activity in sweet cherry fruit in frozen storage, depending on the used preharvest anti-cracking preparations. The study material was sweet cherry fruits of the ‘Burlat’ cultivar, that were treated with anti-cracking preparations. In fresh fruits and during their frozen storage at temperature –25°C (after 60, 120, and 180 days), the mentioned parameters were determined. The preharvest use of anti- -cracking preparations caused an increase in total flavonoids content, and antioxidant activity was observed. In plant untreated anti-cracking preparations, decrease in antioxidant parameters were observed. The preharvest use of during frozen storage deepened the decrease of total flavonoids content and antioxidant activity but limited the changes in the content of dry weight and total polyphenols. The analysis of the kinetic degradation demonstrated that total flavonoid content was characterized by higher stability in the fruits, which were not treated with anti- -cracking preparations. An opposite trend was determined for total polyphenols content.
  • Miniatura
    PozycjaOpen Access
    The Effects of Inca Fertilizer Used in Foliar Nutrition on Yield Quantity and Quality and Selected Physiological Parameters of Sweet Cherry Cv. ‘Burlat’
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2018) Mikiciuk, Grzegorz; Mikiciuk, Małgorzata; Telesinski, Arkadiusz; Statkiewicz, Małgorzata; Chylewska, Urszula; Department of Horticulture, West Pomeranian University of Technology, Szczecin, Poland; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin, Poland; Department of Plant Physiology and Biochemistry, West Pomeranian University of Technology, Szczecin, Poland; Department of Horticulture, West Pomeranian University of Technology, Szczecin, Poland; Department of Horticulture, West Pomeranian University of Technology, Szczecin, Poland
    Sweet cherry is an important crop, grown on all continents. A serious problem associated with sweet cherry cultivation is fruit cracking, occurring on rainy days during the ripening period. The yield loss caused by fruit cracking can be as high as 90%. The most common approach to reducing this adverse phenomenon is foliar fertilization with calciumcontaining preparations. Only a few studies have focused on the impact of this macronutrient on fruit quality and content of bioactive substances in them and physiological properties of the trees. The aim of this study was to evaluate the effects of calcium foliar supplementation on fruit yield quality and quantity, fruit susceptibility to cracking and on selected physiological parameters of sweet cherry. The study involved 14-year old sweet cherry trees of 'Burlat' cultivar, grafted onto 'PHL-A' rootstock. The trees were sprayed with InCa fertilizer (8.0% N, 13.0% CaO, and 1.0% Zn). The fertilizer was applied three times, at a dose of 1.5 dm3 ∙ ha–1 . The first foliar fertilization was performed at the beginning of the flowering period, and the next two took place at fourteen-day intervals. By reducing fruit cracking, InCa used in foliar nutrition significantly increased marketable yield of sweet cherry, without changing fruit weight, size or antioxidant properties. Application of the fertilizer caused a reduction in total acidity (TA) of the fruit and increased TSS/TA (total soluble solids/total acidity) ratio. Foliar application of InCa fertilizer increased the content of chlorophyll a, total chlorophyll and carotenoids in the leaves of 'Burlat' cultivar. The foliar nutrition with InCa did not change CO2 assimilation rate, CO2 concentration in leaf intercellular spaces and the value of relative water content (RWC).