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vol. 18, nr. 2 (2011)
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Changes in nutrient content in soil under cultivation of onions fertilised with nitrogen fertilisers
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Grażyna Jurgiel-Małecka, Małgorzata Maciejewska, Danuta Brzostowska-Żelechowska
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Department of General and Ecological Chemistry West Pomeranian University of Technology ul. Słowackiego 17, 71-434 Szczecin |
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vol. 18 (2011), nr. 2,
pp. 297-310
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abstract:
The aim of this study was to assess the influence of nitrogen fertilisation used to grow common onion (Allium cepa L. var. cepa Helm.), top onion (Allium cepa var. proliferum Targioni-Tozzetti) and shallot onion (Allium cepa L. var. ascalonicum) on the chemical composition of soil. Two-year field experiment was conducted at the Vegetable Experimental Station in Dołuje. Urea, ammonium nitrate and calcium nitrate were applied at two different nitrogen doses (100 and 200 kg N ha-1). Nitrogen fertilisation significantly reduced the soil pH. Urea and ammonium nitrate used at the dose of 200 kg contributed to a reduction in soil magnesium, calcium, potassium and phosphorus levels. Calcium nitrate applied at the same dose also reduced the level of magnesium, potassium and phosphorus in the soil, and an increase in the level of calcium.
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keywords:
soil, nitrogen fertilisation, onions, magnesium, calcium, potassium, phosphorus, nitrogen
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original in:
Polish
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