Suo - Mires and peat vol. 34 no. 4-5 | 1983
Mustakuusen istutustaimikon alkukehitys ojitetulla karulla avosuolla.
English title: Initial development of planted Picea mariana on a drained nutrient poor open bog in Finland.
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The paper deals with the initial development of black spruce (Picea mariana) (Mill.) B.S.P., provenance St. John River Valley, New Brunswick, Canada), compared with that of native Scots pine (Pinus sylvestris) in a planting experiment on a drained smallsedge bog in southern Finland during the first thirteen years since planting.
The results of the experiment showed that the every growth paramenter of black spruce was somewhat lower than that of Scots pine. Partly, the slow growth may have been connected with the stagnation period common to Picea species in general after planting. Also the provenance of black spruce is probably not the most suitable one to the conditions in southern Finland. It is considered to be worth-wile to continue follow-up studies. Especially the different nutrient requirements of the two tree species may turn out only later.
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Päivänen,
Sähköposti:
ei.tietoa@nn.oo
Soista, soiden käytöstä ja suoekologisesta tutkimuksesta Karjalan ASNT:ssa.
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The utilization of mires and some recent research results carried out in Soviet Karelia (ASSR), USSR are reviewed. Information concerning the utilization of mires for forestry and agricultural purposes, their value as a natural plant resource, and mire concervation are presented. The aims and results or the sturdies mostly carried out at the Kidasovo Field Station, are rewieved. Included are studies on medical plants, berry plants, primary production, peat microbiology, decomposition and forestry.
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Lindholm,
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ei.tietoa@nn.oo
- Vasander, Sähköposti: ei.tietoa@nn.oo
Esimerkki keidassoiden ojitus- ja lannoitustoiminnan heikosta kannattavuudesta.
English title: The low profitability of draining and fertilizing sparsely tree covered ombrotrophic bogs for forestry purposes: a case study.
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The ombrotrophic raised bog Laaviosuo at Lammi, southern Finland, was studied to access the economics of draining and fertilizing sparsely tree covered bogs. Input and output were calculated using both real short-term values and hypothetical long-term values. The profitability was found to be low in both cases. Amelioration of this kind of bog may therefore be considered an uneconomic proposition.
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Vasander,
Sähköposti:
ei.tietoa@nn.oo
Turpeen lämpöarvon ja maatuneisuuden välisestä riippuvuudesta.
English title: The relationship between the calorific value and the humification of peat.
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Results concerning the relationship between the calorific value and the humification degree (von Post) of peat from 282 Finnish peat samples were compared with corresponding data published earlier. Differences were most striking within Sphagnum peats indicating that new (larger) material is desired.
Other methods tested for measuring the past decomposition included the fiber (rubbed and unrubbed) content of peat, Pyavchenko's laboratory volume weight method, the centrifuge method, the pyrophosphate index and the colorimetric method by NaOH (using lengths 280, 472, 570 and 664 nm). The usability of these methods for an indirect prediction of the calorific value was found to vary from one peat type to another. The regression equations presented are based on too few samples and enable only rough estimations of peat calorific value.
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Tolonen,
Sähköposti:
ei.tietoa@nn.oo
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