N-Aufnahme und -Verwertung verschiedener N-Düngerformen durch Winterweizen – Gefäßversuche mit 15N |
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Authors: | S Müller |
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Institution: | Universität Leipzig, Germany |
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Abstract: | N-uptake and N utilization of different fertilizer types by winter wheat – pot experiments with 15N The efficiency of top dressing urea, ammonium nitrate and ammonium sulphate fertilizers on winter wheat grown on loamy sand and loessial black soil was studied. At a rate of 0.5 g N per pot on the loamy sand 20 % volatilization losses of NH3 occurred with urea and 10 % on the loessial black soil with urea resp. ammonium sulphate. The grain yields an N removal correspond to these results. At an amount of 1.6 g N per pot the N-uptake of 15N ranged from 0.589 g (urea) on sandy soils to 1.279 g (ammonium nitrate) which agrees with 76 % an 91 % of the total N uptake. On black soil 0.675 g (urea) and 1.038 g (ammonium nitrate) or 44 % and 51 % of the total uptake are found. |
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Keywords: | winter wheat N uptake und N utilization yield 15N efficiency urea ammonium nitrate ammonium sulfate |
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