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Effects of Partial Cutting and Scarification on Planted Picea abies at Mid-elevation Sites in South-east Norway

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Mortality, injury and height growth of planted Picea abies (L.) Karst. were examined over a 6 yr period in eight stands at middle altitudes (430-620 m a.s.l.) in south-east Norway. There were four residual stand density treatments (shelterwoods of high, medium and low density, 25×25 m patch-cut) combined with three scarification treatments (unscarified, patch scarification, inverting) in a split-plot design. Mortality was very low during the experimental period, and did not differ significantly between the residual stand density treatments (mean=11.1%). Both survival and plant height after 6 yrs were improved by inverting, while patch scarification was intermediate but not significantly different from the unscarified alternative. The patch-cutting resulted in the tallest plants, while only minor differences in height growth were found between the shelterwood treatments. The frequency of injured plants after 6 yrs was not significantly affected by the treatments (mean=10.6%). The improved plant establishment at inverting is in agreement with previous studies on clear-cuts.

Keywords: Norway spruce; growth; injuries; mortality; planting; site preparation

Document Type: Research Article


Publication date: January 1, 2003

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