Soil respiration after slash and stump removal in three clear-cut areas with patch scarification and mounding

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Abstract
We studied the soil carbon dioxide respiration (Rs) at three clear-cut mesic forest sites in south, central and north central Finland, which had been treated with different intensities of stump lifting and slash removal and then patch mounded and planted with spruce. The follow-up period after the initial calibration lasted for five consecutive years. Throughout the study the Rs remained at fairly steady levels according to study site and soil disturbance level. Based on a split-plot test using the general linear model there were no significant differences in the Rs between the different stump and slash removal treatments at the three study sites, but Unaffected and moderately affected soil surfaces had significantly higher Rs than mounds and wheel ruts. We conclude that removal of stumps and slash have minor direct effects on Rs, but large indirect effects through soil disturbance.

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