Suo - Mires and peat vol. 40 no. 4 | 1989
Ohutjuurten biomassa ja pituus ojitusalueen männikössä, koivu-mäntysekametsikössä ja kuusikossa.
English title: Fine root biomass and length in a pine, mixed birch-pine and spruce stand on a drained peatland.
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The biomass of Scots pine fine roots (diam. <10 mm) averaged ca. 5 000 kg/ha and total length ca. 12 000 km/ha on a tall-sedge pine mire. In a herb-rich sedge birch-pine mire, Scots pine fine root biomass was ca. 800 kg/ha and hairy birch fine root biomass 2 000-4 000 kg/ha. The total length of fine roots were correspondingly ca. 3 000 km/ha and 4 000-7 000 km/ha. Norway spruce fine root biomass was 7 000-8 000 kg/ha with a total length of ca. 11 000 km/ha on a Vaccinium myrtillus spruce mire. The root systems were superficial; over 90% of the root biomass was in the uppermost 20 cm peat layer. The biomass of 1-10 mm diameter fine roots was larger than that of the <1 mm roots on all sites. In the case of root length, the situation was just the opposite.
Keywords: Drainage, hairy birch, Norway spruce, root systems, Scots pine
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Finér,
Finnish Forest Research Institute, Joensuu Research Station, P.O. Box 68, SF-80100 Joensuu, Finland
Sähköposti:
ei.tietoa@nn.oo
Kuivatuslämpötilan vaikutus eri turvelajien uuttuviin pää- ja hivenravinteisiin sekä pH-lukuun.
English title: Effect of drying temperature on the extractable macro-and micronutrients and pH of different peat types.
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Saarinen, J. 1989: Effect of drying temperature on the extractable macro-and micronutrients and pH of different peat types. (Tiivistelmä: Kuivatuslämpötilan vaikutus eri turvelajien uuttuviin pää- ja hivenravinteisiin sekä pH-lukuun. — Suo 40:149-153. Helsinki. ISSN 0039-5471
Increasing the drying temperature from 20 to 105°C decreased extractable iron and lowered pH but increased the extractable phosphorus. Changes in the extractability of other nutrients were negligible. The effect of drying temperature on different peat types was similar.
Keywords: Extractable nutrients, peat chemistry, soil analysis
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Saarinen,
Agricultural Research Centre of Finland, Institute of Crop and Soil, Soil Science, SF-31600 Jokioinen, Finland
Sähköposti:
ei.tietoa@nn.oo
Turpeen tärkeiden polttoaineominaisuuksien nopea analysointi FT-IR-spektroskopian avulla.
English title: Rapid analysis of important fuel properties of peat by FT-IR spectroscopy.
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Several important fuel properties of peat were rapidly determined by FT-IR spectroscopy, using the multicomponent analysis program CIRCOM. The following correlations (r2) were found between FT-IR data and data obtained by traditional analytical methods, for 16 standard peat samples: calorific value 0.93, carbon content 0.95, volatiles 0.92 and nitrogen content 0.98. Determinations of hydrogen and ash contents in peat did not give satisfactory results (r2 = < 0.7).
Keywords: FT-IR spectroscopy, fuel analysis, peat
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Aho,
Technical Research Centre of Finland, Fuel and Combustion Laboratory, P.O. Box 221, SF-4010! Jyväskylä, Finland
Sähköposti:
ei.tietoa@nn.oo
- Korpelainen, Sähköposti: ei.tietoa@nn.oo
Rahkasammalesta turpeeksi, A.K. Cajanderin erään vanhan näytesarjan tarkastelua.
English title: From living Sphagnum to peat: a re-analysis of old material collected by A.K. Cajander.
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The peat formation time scale in the acrotelm was evaluated using the rate of burial of the root collars and the tree age of buried Scots pine stems in the surface peat. The data were originally presented, but unanalysed, by A.K. Cajander (1906). During the first 30 years after the germination of pine seed the Sphagnum carpet above the root level increased its thickness without noticeable compression and decomposition. During the following 20-30 years the decomposition increased, but the growth of Sphagnum also decreased. A third phase began after 55-60 years during which the growth of Sphagnum was compensated by decomposition.
Keywords: Acrotelm, peat formation, Sphagnum growth
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Lindholm,
Water and Environment Research Office (Nature Conservation), Water and Environment Research Institute, P.O. Box 250, SF-0010! Helsinki, Finland
Sähköposti:
ei.tietoa@nn.oo
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