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vol. 7, nr. 4 (2006)
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The effect of the form and rate of nitrogen on yielding and chemical composition of coneflower (echinacea purpurea moench.) in first and second year after transplanting
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Anita Biesiada1, Alicja Kucharska2, Anna Sokół-Łętowska2
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1 Department of Horticulture, Agricultural University, ul. Rozbrat 7, 50-334 Wrocław |
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2 Department of Fruit, Vegetable and Grain Technology, Agricultural University, ul. Rozbrat 7, 50-334 Wrocław |
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vol. 7 (2006), nr. 4,
pp. 829-838
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abstract:
The aim of the experiment conducted in 2003-2005 at the University of Agriculture in Wrocław was to determine the effect of form and rate of nitrogen on yielding and chemical composition of coneflower herb. The two factorial experiment tested the pre-sowing applied forms of nitrogen: NH4NO3, Ca((NO3)2, (NH4)2SO4, CO(NH2)2 , as well as total rates of N used during vegetation period (50, 50+50, 100+100 kg N ha-1) The yield of the herb was significantly higher when (NH4)2SO4 was used before transplanting of coneflower, and when the total rate of nitrogen was 100 kg N ha-1. The chemical status of plants fertilized with 100 kg Nha-1 was: 1.68-1.96% NO3- N, 0,23% P, 2,89-3,59% K, 2,45-2,74% Ca and 0,51-0,54% Mg. A higher content of phenolic compounds was obtained when source of nitrogen in pre-sowing fertilization were ammonium sulphate and urea and when nitrogen was supplied at the rate 100 kg N ha-1.
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keywords:
Echinacea purpurea, form and rate of nitrogen, chemical composition of herb
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original in:
Polish
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