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vol. 7, nr. 3 (2006)
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Effect of different nitrogen-potassium fertilization on the yielding and chemical composition of lettuce
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Zbigniew Jarosz, Katarzyna Dzida
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Department of Soil Cultivation and Fertilization of Horticultural Plants, University of Agriculture, ul. Leszczyńskiego 58, 20-068 Lublin |
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vol. 7 (2006), nr. 3,
pp. 591-597
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abstract:
In the experiment with lettuce (Lactuca sativa var. capitata) cv. Omega F1 grown in greenhouse, the effect of three nitrogen doses (0.25; 0.50; 0.75 g dm-3) and different types of potassium fertilizer (K2SO4, KCl, KNO3) on the yield and chemical composition of leaves was investigated. Higher yield of lettuce was observed with nitrogen fertilization at 0.50 and 0.75 g dm-3, compare to 0.25 g N dm-3. Type of potassium fertilizer had no effect on the yield of lettuce. Increase of nitrogen doses caused higher content of nitrates in fresh weight, dry matter, total nitrogen and decreased potassium in leaves of lettuce. Lowest nitrate content in the fresh weight of lettuce was recorded in the case of KCl fertilization, compared to plants fertilized with K2SO4 and KNO3.
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keywords:
nitrogen dose, type of potassium fertilizer, yield, chemical composition, nitrate content
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original in:
Polish
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