Acidification and liming of coniferous forest soil: Long-term effects on turnover rates of carbon and nitrogen during an incubation experiment |
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| Authors: | U Lohm K Larsson H Nômmik |
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| Institution: | Department or Water in Environment and Society, University of Linköping, S-581 83 Linköping, Sweden;Department of Forest Soils, Swedish University of Agricultural Sciences, S-750 07 Uppsala, Sweden |
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| Abstract: | Forest soils from field plots, subjected to long-term acidification by H2SO4 treatment, or to liming, were examined for the effects of treatment on net mineralization and turnover rates of carbon and nitrogen during incubation. The total soil respiration was decreased as a result of acidification, whereas the proportion of labeled C, introduced as 14C-glucose at start of the incubation, was increased in the CO2 pool emitted. The accumulation of mineral N (ammonium) was not significantly influenced by acidification, whereas the rate of microbial N turnover, obtained from 15N-dilution data for the exchangeable NH4+ fraction, was markedly decreased. |
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