THE INFLUENCE OF VARIED NITROGEN FERTILIZATION ON YIELD AND CHEMICAL COMPOSITION OF SWISS CHARD (Beta vulgaris L. var. cicla L.)
Year: 2008
Type: article
Abstract: . The examinations were aimed at determining the dependence between form and rate of applied nitrogen fertilizer vs. yield and chemical composition of leaves of Swiss chard cultivated in greenhouse in spring. Nitrogen was applied in a form of urea, potas-sium nitrate, and ammonium nitrate at three amounts: 0.2; 0.4; 0.6 g N·dm-3 of substrate. Following items were assessed: yield, nutrients contents, as well as chemical analyses of substrate after plant harvest were made. Increase of nitrogen rate in objects with potas-sium nitrate and ammonium nitrate resulted in the decrease of fresh matter yield, while in objects with urea, the yield remained at constant level. The highest yield of above ground parts (356 g·plant-1) was achieved by fertilizing the plants with the lowest nitrogen rate (as ammonium nitrate). Contents of nitrates in leaf dry matter was within the range of 0.59–1.27 % depending on nitrogen rate and form. The highest nitrate levels were found when potassium nitrate was applied as fertilizer, whereas the lowest – when applying ammonium nitrate; however, regardless the fertilizer type, higher rates caused the increase of nitrate contents. Studies revealed that at increasing nitrogen concentration in a sub-
Authors: Katarzyna Dzida, Karolina Pitura
Institution: University of Life Sciences in Lublin
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2107455202