Risto Lauhanen , Mikko Moilanen, Klaus Silfverberg, Heikki Takamaa, Jorma Issakainen

Puutuhkalannoituksen kannattavuus eräissä ojitusaluemänniköissä

Lauhanen R., Moilanen M., Silfverberg K., Takamaa H., Issakainen J. Puutuhkalannoituksen kannattavuus eräissä ojitusaluemänniköissä.

English title: The profitability of wood ash-fertilizing of drained peatland Scots pine stands

Tiivistelmä

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

Avainsanat
Scots pine; wood ash; forest fertilization; internal rate of return; net present value; stem volume

Vastaanotettu 31.10.2017 Julkaistu 1.1.1997

Katselukerrat 2073

Saatavilla http://suo.fi/article/9767 | Lataa PDF

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