The Behavior of Nitrogen Isotopes in Acidified Forest Soils in the Czech Republic |
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Authors: | Buzek F ?erný J Pa?es T |
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Institution: | 1. Czech Geological Survey, Klárov 3, 118 21, Prague 1, Czech Republic
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Abstract: | The effects of atmospheric deposition on N cycling in acidified soils were studied at three spruce and one beech forested sites in the Czech Republic. Nitrogen content and δ15N were monitored in bulk and throughfall precipitation, needles, leaves, soils and soil solutions. Changes in soil NO3 - production, effect of admixing of atmospheric N in spruce forest and N consumption in deciduous forest are described using changes in 15N fractionation of mineralized N in soil. Admixing of atmospheric NH4+ can be identified at low concentrations of exchangeable NH4 +. The δ15N ratio of atmospheric NO3 - input is on average by 2‰ less negative than the δ5N ratio in soil water; admixing changes the δ15N of soil NO3 - detected in lysimeters. |
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