Suo - Mires and peat vol. 42 no. 5 | 1991
Ojitettujen rämeiden pohjaveden laatu ja sen riippuvuus turpeen kemiallisista ominaisuuksista.
English title: Groundwater quality and its relationship to peat chemical properties on drained pine mires.
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Tekijät
The variation in groundwater nutrient concentrations from 29 oligotrophy pine mires were described. The relationships between groundwater chemistry and the chemical status of the surface peat layer were also investigated. The mean groundwater quality in different site type fertility groups was: pH 4.0-4.8; NH4+-N 0.45-0.80 mg l-1; P 0.06-0.15 mg l-1; K 0.27-0.54 mg l-1 ; Ca 1.40-3.78 mg l-1; Mg 0.49-1.67 mg l-1; Mn 0.01-0.12 mg I-1; Fe 0.69-3.20 mg l-1; Al 0.34-0.57 mg i-1; Zn 0.006-0.015 mg I-1; Na 0.63-1.91 mg l-1; B 0.008-0.010 mg l-1 and S 1.15-1.47 mg l-1. When ordered from the most infertile to the most fertile site types, groundwater pH and total concentrations of Ca, Mg, Mn, Fe and Na significantly (P < 0.001) increased. There was a large seasonal variation in the concentrations of S, K, Na, B and Zn, and a large within-plot variation in K, NH4+-N, P and B concentrations. The results indicated that factors other than the chemistry of peat were involved in determining the concentrations of these nutrients in the groundwater. Groundwater concentrations of Al, Fe, Ca and Mg, on the other hand, were found to be strongly correlated with the corresponding total nutrient concentrations in the surface peat layer.
Keywords: peatlands, peat nutrients, water chemistry
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Nieminen,
The Finnish Forest Research Institute, P.O. Box 18, SF-01301 Vantaa, Finland
Sähköposti:
ei.tietoa@nn.oo
- Pätilä, Sähköposti: ei.tietoa@nn.oo
Turvetutkimus Suomen asutushistorian selvittämisessä.
English title: Settlement history of Finland traced by means of microfossil analyses of peat deposits.
Avainsanat:
peatland;
archaeometry;
charcoal particles;
loss-on-ignition;
pollen analysis;
settlement history
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Information on early settlement history in SW Finland has increased considerably as a result of archaeometrical studies including pollen analysis, charcoal analysis and loss-on-ignition analysis of peat deposits, especially of Sphagnum peat. The results together with 14C-datings, show that the introduction of agriculture took place from the S-SW in the SW archipelago as early as 3600±90 BP (before present). This, however, does not explain the early pollen and charcoal dust evidence of cultivation in the Kainuu district where corresponding darings of 3680±90 BP have recently been obtained, or in Siilinjarvi where evidence of early cultivation around 3000 BP has also been recorded.
Keywords: archaeometry, charcoal particles, loss-on-ignition, peatland, pollen analysis, settlement history
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Vuorela,
The Geological Survey of Finland, Betonimiehenkuja 4, SF-02150 Espoo, Finland
Sähköposti:
ei.tietoa@nn.oo
Lannoituksen vaikutus rämemännikon kasvuun ja rakenteeseen.
English title: Effect of fertilization on the growth and structure of a Scots pine stand growing on an ombrotrophic bog.
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NPK fertilization increased volume growth by 6.3 m3 ha-1 and PK fertilization by 4.3 m3 ha-1 within six years after nutrient application. The results indicate that dominant and co-dominant trees respond to fertilization better than suppressed ones, and that the trees close to the ditches benefit almost as much from fertilization as those in the middle of the strip. NPK fertilization also increased the mortality of the intermediate trees.
Keywords: bog, drainage, increment, Pinus sylvestris, tree class
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Finér,
Finnish Forest Research Institute, Joensuu Research Station, P. O. Box 68, SF-80101 Joensuu, Finland
Sähköposti:
ei.tietoa@nn.oo
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