Soil Mineral Nitrogen Availability was Unaffected by Elevated Atmospheric pCO sub(2) in a Four Year Old Field Experiment (Swiss FACE)

The availability of mineral nitrogen in soil of a Lolium perenne L. monoculture exposed to elevated atmospheric carbon dioxide partial pressure and N fertilization was explored. Nitrate was the predominant form of mineral N bound to mixed bed ion exchange resin bags at soil depths of 5 cm, and appar...

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Bibliographic Details
Published in:Plant and soil 2000-01, Vol.227 (1), p.291-291
Main Authors: Gloser, Vit, Jezikova, Marta, Luscher, Andreas, Frehner, Marco, Blum, Herbert, Nosberger, Josef, Hartwig, Ueli A
Format: Article
Language:English
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Summary:The availability of mineral nitrogen in soil of a Lolium perenne L. monoculture exposed to elevated atmospheric carbon dioxide partial pressure and N fertilization was explored. Nitrate was the predominant form of mineral N bound to mixed bed ion exchange resin bags at soil depths of 5 cm, and apparent N availability was markedly affected by the elevated CO sub(2). treatment only in the first week after a spring cut. Under high N fertilization, elevated CO sub(2) partial pressure did not affect apparent net transformation of N, N loss, or N uptake by plants. A possible limiting effect of N on primary production could become more pronounced under elevated atmospheric CO sub(2) partial pressure as the plant demand for N increases.
ISSN:0032-079X