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Forests 2011, 2(1), 373-393; doi:10.3390/f2010373

Simulation of the Effect of Intensive Forest Management on Forest Production in Sweden

Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences (SLU), P.O. Box 49, SE-230 53 Alnarp, Sweden
Tönnersjöheden and Skarhult Experimental Forests, Swedish University of Agricultural Sciences (SLU), P.O. Box 17, SE-310 38 Simlångsdalen, Sweden
Department of Forest Resource Management, Swedish University of Agricultural Sciences (SLU), SE-901 83 Umeå, Sweden
The Forestry Research Institute of Sweden, P.O. Box 3, SE-918 21 Sävar, Sweden
Author to whom correspondence should be addressed.
Received: 1 December 2010 / Revised: 23 February 2011 / Accepted: 28 February 2011 / Published: 9 March 2011
(This article belongs to the Special Issue Future Forests)
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The effects of intensifying the management of 15% of the Swedish forest land on potential future forest production over a 100-year period were investigated in a simulation study. The intensive management treatments, which were introduced over a period of 50 years, were: intensive fertilization of Norway spruce (IntFert); bulking-up Norway spruce elite populations using somatic embryogenesis (SE-seedlings); planting of lodgepole pine, hybrid larch, and Sitka spruce (Contorta, Larch, and Sitka); fertilization with wood ash on peatlands (Wood ash); and conventional fertilization in mature forests (ConFert). Potential sites for applying intensive forest management (IFM) to sites with low nature conservation values were determined with a nature conservation score (NCS). Four different scenarios were simulated: “Base scenario”, which aimed at reducing the negative impact on nature conservation values, “Fast implementation”, “No IntFert” (IntFert was not used), and “Large Forest Companies”, where the majority of plots were selected on company land. Total yields during the 100-year simulation period were about 85–92% higher for the intensive forest management scenarios than for the reference scenario (business as usual). In the “No IntFert” scenario total production was 1.8% lower and in the “Large Forest Companies” scenario total production was 4.8% lower than in the “Base scenario”. “Fast implementation” of IFM increased yield by 15% compared to the “Base scenario”. Norway spruce SE-seedlings and IntFert gave the highest yields, measured as total production during the 100-year simulation period, but relative to the yields in the reference scenario, the highest increases in yield were for Contorta. The “Base scenario” and “No IntFert” gave the highest yields for plots with the lowest NCS, but plots with higher NCS had to be used in the “Fast implementation” and “Large Forest Companies” scenarios. More than half of the effect on future growth of IFM methods was because of increased intensity in the regenerations. It took a relatively long time (40–60 years) for the simulated IFM treatments to result in a significant increase in stem volume production.
Keywords: fertilization; genetics; plantation forestry; scenarios; tree species fertilization; genetics; plantation forestry; scenarios; tree species
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Nilsson, U.; Fahlvik, N.; Johansson, U.; Lundström, A.; Rosvall, O. Simulation of the Effect of Intensive Forest Management on Forest Production in Sweden. Forests 2011, 2, 373-393.

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