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Dinitrogen and Nitrous Oxide Formation in Beech Forest Floor and Mineral Soils

Univ. of Göttingen, Institute of Soil Science and Forest Nutrition, Büsgenweg 2, D-37077 Göttingen, Germany

View larger version (19K): [in a new window]   Fig. 1. Net N-mineralization of ammonium, nitrate, and ammonium + nitrate (NNM) during 8 d of incubation at 20°C of the less acid mineral soil from Göttinger Wald (LAM), the acid forest floor (AFF), and the acid mineral soil from Solling (AM).

View larger version (28K): [in a new window]   Fig. 2. Temporal changes in the 15N abundance of nitrate, ammonium, and N2O in the experiments with 15N labeled nitrate and 15N labeled ammonium during 8 d of incubation at 20°C of the less acid mineral soil from Göttinger Wald (LAM), the acid forest floor (AFF), and the acid mineral soil from Solling (AM).

View larger version (17K): [in a new window]   Fig. 3. Average emissions of N2O, N2, and (N2O + N2) at the less acid mineral soil at Göttinger Wald (LAM), the acid forest floor (AFF), and the acid mineral soil at Solling (AM). The emission of N2 at AM is zero.