Yazar "Wichrowska, Dorota" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    Effect of Drip Fertigation with Nitrogen Application on Bioactive Compounds and the Nutritional Value of Potato Tubers before and after Their Long-Term Storage
    (2021) Wichrowska, Dorota; Rolbiecki, Roman; Rolbiecki, Stanislaw; Sadan, Hicran A.; Figas, Anna; Jagosz, Barbara; Atılgan, Atılgan
    The nutritional value and the content of bioactive compounds in potato tubers are influenced by many soil, climate and agrotechnical factors. This study investigated the effect of drip irrigation and nitrogen fertilization by broadcasting and fertigation on the content of dry matter, starch, monosaccharides, total sugars, vitamin C, polyphenolic compounds, chlorogenic acid and antioxidant activity in tubers of "Augusta " potatoes. Additionally, the magnitude of the changes in the tested components during their long-term storage (6 months) was also assessed. Drip irrigation had a significant positive effect on the content of dry matter, starch, vitamin C, monosaccharides, sucrose, total sugars, total polyphenols, chlorogenic acid and antioxidant capacity. Compared to broadcasting fertilization, fertigation significantly increased the content of vitamin C, total polyphenols and chlorogenic acid, as well as the antioxidant activity of potato tubers. Long-term storage contributed to a decrease in the tested components. The exception was the content of monosaccharides, where a more than twofold increase was noted, especially in the case of irrigated tubers. The results of the research showed a beneficial effect of drip irrigation and fertigation on the content of bioactive compounds and the nutritional value of "Augusta " potato tubers.
  • [ X ]
    Öğe
    Yields and Bioactive Substances of Selected European Asparagus Cultivars Grown for Green Spear Production as Influenced by of Post-Harvest Drip Irrigation on Sandy Soil in Central Poland
    (Polish Soc Ecological Engineering-Ptie, 2024) Rolbiecki, Roman; Rolbiecki, Stanislaw; Sadan-Ozdemir, Hicran; Figas, Anna; Wichrowska, Dorota; Jagosz, Barbara; Krakowiak-Bal, Anna
    The field experiment was conducted during the years 2006-2008 on a very light soil in central Poland in an area particularly deficient in water. The key aim of the study was the reaction of 10 European asparagus ( Asparagus officinalis L.) cultivars: Ravel, Rambo, Rally, Ramada, Rapsody, Cipres, Plaverd, Backlim, Grolim, Orane, grown for green spear production to surface drip irrigation. Drip irrigation of the asparagus plants had a positive effect both on summer stalks and green spears. A significant increase in the height, number and diameter of summer stalks, as well as an increase in the marketable yield, weight and number of green spears was observed for most of the cultivars. Both factors, the irrigation used and the asparagus cultivars, significantly modified the antioxidant content in asparagus spears. The Rapsody cultivar accumulated significantly more, and the Grolim cultivar significantly less, total polyphenols in asparagus spears at unirrigated plots. An inverse relationship was obtained in the Grolim cultivar with respect to the content of vitamin C, which accumulated the most of it under the irrigation conditions. The Ramada cultivar from irrigated plots contained significantly the highest amount of total carotenoids. In turn, the Cipres and Grolim cultivars from irrigated plots were characterized by the highest antioxidant activity.