Suo - Mires and peat vol. 48 no. 3 | 1997
Puutuhkalannoituksen kannattavuus eräissä ojitusaluemänniköissä.
English title: The profitability of wood ash-fertilizing of drained peatland Scots pine stands.
Avainsanat:
Scots pine;
wood ash;
forest fertilization;
internal rate of return;
net present value;
stem volume
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Tekijät
The profitability of wood ash-fertilizing (5-16 t ha-1) of four drained peatland Scots pine stands in central Finland was investigated. The profitability of forest drainage alone and forest drainage plus ash-fertilization was compared. After 44-56 years, the wood ash-fertilization had increased mean productivity by 3.1-12.1 m3 ha-1 a-1. Using an interest rate of 3 % and without subsidies, the net present value of the stands was 2500-20300 FIM ha-1 higher as a result of the ash-fertilization than the value given by forest drainage alone. The real internal rate of return due to ash-fertilization without subsidies was 3.7-9.3 %. The interest rate, the fertilization dose and related costs, and the stumpage prices affected profitability. The state forest improvement subsidies further increased the profitablity of ash-fertilization.
Key words: forest fertilization, internal rate of return, net present value, Scots pine, stem volume, wood ash
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Lauhanen,
The Finnish Forest Research Institute, Kannus Research Station, FIN-69100 Kannus, Finland
Sähköposti:
ei.tietoa@nn.oo
- Moilanen, Sähköposti: ei.tietoa@nn.oo
- Silfverberg, Sähköposti: ei.tietoa@nn.oo
- Takamaa, Sähköposti: ei.tietoa@nn.oo
- Issakainen, Sähköposti: ei.tietoa@nn.oo
Kasvupaikkatekijöiden vaikutus vanhojen ojitusalueiden taimettumiseen Kirjallisuuteen perustuva tarkastelu.
English title: Effect of site factors on restocking of old drainage areas. A literature review.
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Tekijä
The rate of renewal of forests on drained peatlands in Finland will undergo a rapid rise in the near future as a large amount of these forests is approaching their renewal age. Indeed, forest renewal increasingly calls for familiarity with the special characteristics of peatland habitats. These special characteristics making them different from upland sites are primarily connected to hydrology, temperature conditions, nutrient status, and to changes in the composition of the ground vegetation. This literature review is focused on the effects of these site factors on the germination of tree seeds and the initial development of seedlings on different seedbeds.
Key words: drainage areas, natural regeneration, peatlands
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Saarinen,
Finnish Forest Research Institute, Parkano Research Station, Kaironiementie 54, FIN-39700 Parkano, Finland
Sähköposti:
ei.tietoa@nn.oo
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