Balances of annual element fluxes ecosystems in the Solling region [Germany, F.R.; beeches, spruces]
1981
Matzner, E. | Ulrich, B. (Goettingen Univ. (Germany, F.R.). Inst. fuer Bodenkunde und Waldernaehrung)
Based on measurements of element fluxes the annual changes of element storage within the compartments "Stand", "Humus Layer" and "Mineral soil" are calculated for a beech and a spruce stand. In spite of high rates of nitrogen (N)-deposition insufficient N supply especially for the beech stand is obvious. The hydrogen ion (H+) buffering capacity of the stands is very limited and is greater for the spruce than for the beech stand. The accumulation of carbon, N, phosphorus and calcium within the humus layer of both stands seems to be due to far reaching changes of decomposition conditions caused by acid recipitation. The mineral soil reacts as a sink for H(+) and sulfur and as a source for calcium, magnesium, manganese and aluminium. From the cation-anion-balance for the changes of element storage the annual H(+)-production within the mineral soil was calculated. The sum of H(+) ions produced ecosystem internal within the humus layer and the mineral soil is greater for spruce than for beech. For the spruce stand the total H(+)-load from deposition and from internal sources is about twice as big as the one of the beech stand.
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