Suo - Mires and peat vol. 37 no. 1 | 1986
Quebecin soista ja metsäojitustoiminnasta.
English title: Peatlands and forest drainage in Quebec, Canada.
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The interest in peatland forestry in Quebec is increasing as the peatlands of the St-Lawrence valley are considered to have a good drainage response capacity A relatively important forest drainage project is being carried out on a practical scale. However, the lack of a practically oriented peatland classification system is an important drawback. This paper is an attempt to produce a preliminary classification system intended for practical peatland forestry.
Keywords: Quebec, forest drainage, site type classification.
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Schneider,
University of Helsinki, Department of Peatland Forestry, Unioninkatu 40 B, SF-00170 Helsinki, Finland
Sähköposti:
ei.tietoa@nn.oo
Puuta ja turvetta käyttävien lämpölaitosten päästöt.
English title: Emissions from wood and peat-fired heating plants.
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The use of wood and peat in small scale boilers (10 kW—10 MW), has increased because the price of oil has advanced. Further the acidification of environment caused by emissions of sulphur oxides has increased. Wood and peat with their small sulphur content are good fuels in this respect.
Emissions of sulphur dioxide, hydrocarbons and nitrogen oxides are not too high during good combustion process. If wood and peat is burnt in plants (1—10 MW), emissions of hydrocarbon and polynuclear aromatic hydrocarbons (PAH) are low. High emissions of tar, total hydrocarbon and PAH have been measured from combustion of wood and peat in small furnaces. The development of boilers to correspond better the properties of the fuels used may decrease significantly these emissions. Also the complete control of the whole combustion process helps to the emissions.
The dust emissions of small plants can be decreased with flue gas collectors. The multicyclone has generally been used as the collector in this scale. Emissions of some metals depend on the fly ash separation efficiency.
Key words: emissions, air pollution, wood firing, peat firing, combustion process.
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Vesterinen,
Technical Research Centre of Finland, Domestic Fuel Laboratory, P.O. Box 221, SF-40101 Jyväskylä, Finland
Sähköposti:
ei.tietoa@nn.oo
Timotein (Phleum pratense) sinkkipitoisuus turvemaalla.
English title: The zinc content of timothy (Phleum pratense) grown on peat soil.
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The zinc contents of timothy grown on peat soils generally low in zinc were considerably raised by zinc fertilization, even when applied at the low rate of 550 g Zn/ha, in combination with other micronutrients. On peat soil groups with average extrac-table zinc contents of 0,60, 1,40 and 7,22 mg/1 the mean zinc contents of timothy before fertilization were 25,6, 27,1 and 28,9 and after fertilization 28,6, 34,8 and 36,4 mg/kg D.M., respectively. The corresponding increases were 11, 28 and 26 per cent. In general, the zinc contents of timothy in this study did not differ essentially from those measured elsewhere in Finland.
Key words: Phleum pratense, zinc content, agriculture, peat soil, P/Zn.
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Urvas,
Agricultural Research Centre, Department of Soil Science, SF-3J600 Jokioinen, Finland
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ei.tietoa@nn.oo
Rahkasammalten pieneläimistö kahdella Ranskan Keskiylängölla sijaitsevalla suolla.
English title: Sphagnum microfauna in two peat-bogs of the French Massif Central.
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The composition and the seasonal fluctuations of the Sphagnum microfauna in two peat-bogs of the Puy-de-Dôme (France) are described and the author attempts to show the importance of the dominant groups in the functioning of the peat-bog ecosystem.
Key words: peat-bog, mire ecosystem, microfauna, French Massif Central
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Francez,
Station Biologique de Besse-en-Chandesse, B.R 45, F-63J70 Aubiére, France
Sähköposti:
ei.tietoa@nn.oo
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