Element turnover in a heavily damaged Norway spruce ecosystem influenced by N deposition
作者： W. Schaaf , W. Zech
DOI: 10.1007/BF00029098
关键词: Humus 、 Environmental science 、 Soil acidification 、 Environmental chemistry 、 Soil horizon 、 Saturation (chemistry) 、 Ecosystem 、 Inceptisol 、 Ecology 、 Biogeochemical cycle 、 Nitrogen cycle
摘要: Element budgets of a heavily damaged Norway spruce ecosystem at Hohe Matzen in the Fichtel Mountains/FRG were studied over 3 years. The trees show severe symptoms decline and Mg deficiency. soil is typic Dystrochrept derived from granite with sandy texture, high stone content, low base saturation. releases N, S Al as result input, buffering turnover processes. After an increase proton fluxes organic surface layer, strong reduction protons B horizon was found. This process accompanied by release Al, whereas reactive Al(OH)3 exhausted A horizon. ANC also shown pH-stat.-titrations. data indicate mineralisation humus which results net NH4, SO4 TOC. Nitrification takes place mainly With respect to N-budget, approaching state N processes lead internal production exceeding atmospheric thus contributing acidification.
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