Jyrki Hytönen

Energiapajujen lannoituksesta entisillä turvetuotantoalueilla

Hytönen J. Energiapajujen lannoituksesta entisillä turvetuotantoalueilla.

Tiivistelmä

The possibilities of producing wood biomass as an energy source in intensive willow plantations is currently being studied as part of the PERA Project (Wood as a Source of Energy) at the Finnish Forest Research Institute. The pH of the peat substrate in areas no longer used for peat production is usually, without soil amelioration, too low for the satisfactory development of the roots of willow. The peat in swamp bottoms has a low phosphorus and potassium content, and the large amounts of nitrogen that are present are bound in an unavailable form in the organic matter. Willows have proved to be very demanding plants. They take up considerable amounts of nutrients — phosphorus and potassium and especially nitrogen — and the amount of nutrients bound in the park and stemwood is many times that bound by birch and pine. The harvesting of the complete above-ground biomass of young willow stands at short intervals may increase the need for fertilization.

Vastaanotettu 31.10.2017 Julkaistu 1.1.1984

Katselukerrat 2223

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