Antti Wall , Jyrki Hytönen

Painomaan vaikutus metsitetyn turvepellon ravinnemääriin

Wall A., Hytönen J. Painomaan vaikutus metsitetyn turvepellon ravinnemääriin.

Tiivistelmä

The effect of mineral soil, applied during the cultivation of fields, on the nutrient amounts of afforested peat fields was studied. 36 afforested peat fields (peat layer>40 cm) from Central Ostrobothnia (western Finland) and North Savo (central Finland) were sampled. Fields were divided into two groups on the basis of mineral soil addition. Volumetric soil samples (0-10, 10-20, 20-30, 30-40 cm layers) were taken and and analyzed for their total and ammonium acetate extractable nutrient concentrations (P, K, Ca, Mg, Mn, Fe, Zn). Kjeldahl nitrogen and boron in H3PO4-H2SO4 were also analyzed. Nutrient amounts in different soil layers were calculated. Mineral soil, mainly silt, had been added on average 230 m3ha-1 in Central Ostrobothnia and 630 m3ha-1 in North Savo. Mineral soil was clearly detectable in the plough layer (0-20 cm) but seldom in the 30-40 cm layer as an increased bulk density and ash content. Mineral soil admixture increased most of the total nutrient amounts, but not nitrogen, calcium and boron. In the amounts of extractable nutrients the effect of mineral soil admixture was smaller. Key words: afforestation, mineral soil, nutrition, peat fields

Avainsanat
afforestation; mineral soil; nutrition; peat fields

Vastaanotettu 31.10.2017 Julkaistu 1.1.1996

Katselukerrat 1325

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