N-fluxes and N-turnover in a mixed beech–pine forest under low N-inputs
| Autor: | H. Schulte-Bisping, F. Beese |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Nitrogen balance
010504 meteorology & atmospheric sciences Soil organic matter chemistry.chemical_element Forestry 04 agricultural and veterinary sciences Plant Science Mineralization (soil science) 01 natural sciences Nitrogen chemistry.chemical_compound chemistry Agronomy Nitrate 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Ecosystem Leaching (agriculture) Deposition (chemistry) 0105 earth and related environmental sciences |
| Zdroj: | European Journal of Forest Research. 135:229-241 |
| ISSN: | 1612-4677 1612-4669 |
| Popis: | Within the framework of the International Cooperative Programme on Integrated Monitoring (ICP IM), nitrogen pools and fluxes and their balance were determined for the German Integrated Monitoring (IM) site, Neuglobsow, characterized by very low soil nitrogen. From 1998 to 2013, total nitrogen (N) deposition in form of ammonium and nitrate was 6.80 ± 1.36 and 6.46 ± 1.09 kg N ha−1 year−1, respectively (in total 13.26 ± 2.01 kg N ha−1 year−1). Meanwhile, the average gaseous loss was 0.7 kg N ha−1 year−1 and the leaching loss was 2.38 kg N ha−1 year−1. Since the remaining atmospheric net N-inputs (10.18 kg N ha−1 year−1) exceeds plant uptake (8.36 kg N ha−1 year−1), there is a nitrogen surplus of 1.82 kg N ha−1 year−1. This surplus and the accelerated mineralization of the soil organic matter which was stored during the decades before the study began when temperatures were slightly cooler, combined with low leaching rates, explain the high nitrogen supply found in the leaves and needles. However, with decreasing nitrogen deposition, biomass export and with air temperatures rises expected the ecosystem N-supply will likely decline in the long run. |
| Databáze: | OpenAIRE |
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