| Michel, K; Matzner, E: Nitrogen content of forest floor Oa layers affects carbon pathways and nitrogen mineralization, Soil Biology Biochemistry, 34, 1807-1813 (2002) | |
| Abstract: As a consequence of chronically high N depositions in forest ecosystems, the C-to-N ratio of forest floors has narrowed in many forest ecosystems. This might affect the sequestration of soil C and the partitioning of C during decomposition. We investigated samples from Oa layers of 15 different forest floors under Norway spruce (Picea abies Karst. L.) with varying C-to-N ratios in respect to soil respiration, N mineralization and dissolved organic carbon (DOC) release under standardized laboratory conditions. Samples were incubated aerobically at 15 °C and water holding capacity over a period of 10 months. Soil respiration decreased significantly with decreasing C-to-N and increasing N content. The release of DOC increased with increasing C-to-N ratio, while N-mineralization was not affected by C-to-N ratio and N content. Our results support the hypothesis that low C-to-N ratios in later stages of decomposition stabilize soil organic matter and that chronically high N deposition will lead to increased accumulation of C in forest floors. Author Keywords: Decomposition; C-to-N ratio; Forest floor; Respiration; Dissolved organic carbon; Norway spruce; C-sequestration |
Aktuelle Termine
Aktuelle Termine
| BayCEER Short Courses: |
|---|
| Fr. 26.04.2024 aktuell Mobile Film Making Workshop (for students of BayCEER) |
| Ökologisch-Botanischer Garten: |
| So. 28.04.2024 Führung | Den Sängern auf der Spur: Vogelstimmen im ÖBG (zus. mit LBV) |
| So. 05.05.2024 Führung | Faszination Englische Gärten: Gestaltung und Pflanzen |
| So. 05.05.2024 Midissage | da capo - Ausstellung von Doris Bocka |
| Mi. 15.05.2024 Kurzführung | "Botanische Mittagspause" |