Suo - Mires and peat vol. 38 no. 3-4 | 1987
Lapin kolmion lettoisista soista.
English title: The rich fens of the Lapland triangle region.
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The Lapland triangle region, located between the lower courses of the rivers Tornion-joki and Kemijoki in NW-Finland covers an area of 3500 km2. The region is renowed for its concentration of rich fen mire site types, including Campylium stellatum — Limprichtia intermedia — rich fens, eutrophic flark fens, eutrophic birch fens, eutrophic pine mires and eutrophic spruce mires. Peatlands cover about 60 % of the total land area of the region. By the end of the 1970's some 90 % of the area of rich fens had been drained and utilized for cultivation and forestry purposes and several plant species had become endangered. Although some 20 sites have been listed for conservation, enforcement so far has been very limited.
Keywords: fens, peatland drainage, endangered species, conservation.
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Ylimartimo,
Department of Silviculture, University of Helsinki, Unioninkatu 40 B, SF-00I70, Finland
Sähköposti:
ei.tietoa@nn.oo
Soidensuojelualueiden hoidon ja käytön suunnittelu.
English title: Management of Finnish peatland conservation areas.
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All 102 peatland conservation areas in Finland are administrated by the National Board of Forestry. In most of these areas commercial forestry is forbidden by law only on the peatlands, but not on the surrounding mineral soil. The principles for the forestry use of the reserves are described in management plans, which are drawn up by the National Board of Forestry and confirmed by the Ministry of Environment. Accor-ding to these plans, the forestry use is adapted so as not to endanger the aims of the peatland conservation.
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Tanninen,
Sähköposti:
ei.tietoa@nn.oo
Havaintoja rahkasammallajeista ja niiden suhteista kasvillisuuteen ja ympäristötekijöihin Bromarvin Östanberg Stormossenilla.
English title: Observations on Sphagnum species and their relation to vegetation and ecological factors in Östanberg Stormossen, southern Finland.
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The relations between Sphagnum species, vegetation, and the macrotopographical and microtopographical environmental gradients of a plateau bog located on the southern coast of Finland were studied. A profile was levelled from the mire margin to the mire centre and 16 sample plots were located along the profile. The vegetation of each sample plot was described using coverage percentages. The mire water level, pH, and specific conductivity were measured for each plot. Samples of the capitula of different species of Sphagnum were taken and they were measured for water content. Hummock surfaces were predominant in the mire centre. The hollows were relatively dry ombrotrophic small sedge bogs. The mire margin fen was mostly mesotrophic. In the northern part of the mire there was also a eutrophic flark fen. In the mire centre the pH was 4 or less and the specific conductivity ranged from 10 to 25 µS/cm. In the mire margin fen the pH ranged from 4.7 to 5.7 and the specific conductivity was c. 50 µS/cm. The water content of the capitula of the Sphagna was in general high, ranging from 300 to 3000 %. In the hollows of the mire centre the water content of Sphagnum tenellum was as low as 15 %.
Key words: mire vegetation, ecology, plateau bog, water content, Sphagnum.
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Heikkilä,
Department of Geography, University of Helsinki, Hallituskatu 11, SF-00100 Helsinki, Finland
Sähköposti:
ei.tietoa@nn.oo
- Löytönen, Sähköposti: ei.tietoa@nn.oo
Turpeentuhkan vaikutuksesta puuston kasvuun ja ravinnetilaan käytännön lannoitustyömailla.
English title: Growth and foliar nutrients in peat-ash fertilized stands.
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This study included growth and needle analysis in ash-fertilized spruce and pine stands near Oulu (65 °N, 26 °E). Most of these stands, totalling 770 measured trees, were on peat and fertilized in wintertime 1980 and 1981 as practical work with 40 m3/ha. By 1985 there was a clear increment of growth, especially in spruce stands, probably due to the great amount of phosphorus (375 kg/ha) applied.
Keywords: peatland forestry, tree growth, ash-fertilization, phosphorus.
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Silfverberg,
Department of Peatland Forestry, The Finnish Forest Research Institute, Unioninkatu 40 A, 00170 Helsinki, Finland
Sähköposti:
ei.tietoa@nn.oo
- Issakainen, Sähköposti: ei.tietoa@nn.oo
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