Artikkelit jotka sisältää sanan 'wood ash'
Puutuhkasta ja muista jäteaineista valmistetut pelletit rauduskoivun taimien ravinnelähteenä.
English title: Pellets made of wood ash and other wastes as nutrient sources for silver birch seedlings.
Avainsanat:
fertilization;
wood ash;
pelletized wastes;
mink dung;
municipal sewage sludge;
silver birch
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The effects of pellets made of wood ash and of ash mixed with other wastes (composted mink dung, composted municipal sewage sludge, dung from stomachs of slaughtered animals) on the growth and nutrition of silver birch (Betula pendula Roth.) seedlings was studied in a greenhouse experiment. Seedlings were grown in peat soil originating from a drained dwarf-shrub pine bog, peat soil from an afforested field, and in mineral soil. The pellets were applied in varying doses (0, 6, 12, 24, 48 t ha-1). When applied at the rate of 24 t ha-1, also the effect of pelletizing was studied. The pellets promoted the growth of the seedlings depending on the waste used, growing medium, and the application amount. The pellets containing the highest amounts of nitrogen had the effect of increasing growth most of all. As compared with the unpelletized-waste treatment, the use of pelletized waste material decreased seedling growth. This was probably due to the reduced solubility of the nutrients contained by the waste material when presented in pelletized form. Pellets increased the foliar nutrient concentrations of many elements depending on the waste used, the growing medium, and the application amount.
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Hytönen,
The Finnish Forest Research Institute, Kannus Research Station, P.O. Box 44, FIN-69101 Kannus, Finland
Sähköposti:
ei.tietoa@nn.oo
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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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
Fyto-2H-valmisteen vaikutus männyn neulasten ravinnepitoisuuksiin suometsissä.
English title: Effect of Fyto-2H-fertilizer on nutrient concentrations in pine needles Scots in peatland forests.
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A granular calcium and wood ash mixture (Fyto-2H-fertilizer) increased foliar, K and B and decreased Zn after two growing periods in Pinus silvestris stands. It had also a positive effect on needle mass (d. m.), but not as pronounced one as the PK-fertilizer for peatland forests. It was concluded that Fyto-2H-product can increase the nutrient contents, which have been observed to be essential for the state of health in peatland forests. Further it contains slowly soluble portions of Ca and Mg, which have been proved to be very often the growth limiting factors e.g. in disturbed forests in Central Europe.
Keywords: Fertilizer, liming, needle analysis, Pinus silvestris, wood ash
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Veijalainen,
Department of Forest Ecology, The Finnish Forest Research Institute P.O. Box 18, FIN-01301, Vantaa
Sähköposti:
ei.tietoa@nn.oo
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