Net sulfur mineralization potential in Swedish arable soils in relation to long-term treatment history and soil properties |
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Authors: | Kristin Boye S Ingvar Nilsson Jørgen Eriksen |
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Institution: | (1) Department of Soil and Environment, Swedish University of Agricultural Sciences, P.O. Box 7014, 750 07 Uppsala, Sweden;(2) Department of Agroecology and Environment, Research Centre Foulum, University of Aarhus, Blichers Allé, P.O. Box 50, 8830 Tjele, Denmark |
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Abstract: | The long-term treatment effect (since 1957–1966) of farmyard manure (FYM) application compared with crop residue incorporation
was investigated in five soils (sandy loam to silty clay) with regards to the net sulfur (S) mineralization potential. An
open incubation technique was used to determine accumulated net S mineralization (SAccMin) and a number of soil physical and chemical properties were determined. Treatments and soil differences in SAccMin, as well as correlations with soil variables, were tested with single and multivariate analyses. Long-term FYM application
resulted in a significantly (p = 0.012) higher net S mineralization potential, although total amounts of C, N, and S were not significantly (p < 0.05) increased. The accumulated S mineralization differed significantly (p < 0.05) between soils within this treatment. The measured soil variables were not significantly correlated to SAccMin. Conclusively, different treatment histories influenced the quality (e.g., chemical composition) and cycling rate of the
organic S pool, rather than its size. |
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Keywords: | Sulfur mineralization Farmyard manure Physical protection Open incubation |
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