Mats T. Olsson, Maria Erlandsson, Lars Lundin, Torbjörn Nilsson, Åke Nilsson, Johan Stendahl. (2009). Organic carbon stocks in Swedish Podzol soils in relation to soil hydrology and other site characteristics. Silva Fennica vol. 43 no. 2 article id 207. https://doi.org/10.14214/sf.207

Keywords: temperature sum; soil organic carbon; forest land; soil hydrological class; N deposition; latitude; site capacity; mean annual precipitation; altitude

Abstract | View details | Full text in PDF | Author Info

Site characteristics influence soil organic carbon (SOC) stocks. In Podzols under Swedish forest land, SOC stocks were related to latitude, altitude, soil hydrological class categorized by mean groundwater level, mean annual precipitation, temperature sum during the growing season, total annual nitrogen (N) deposition and site capacity. SOC stocks were determined for the O-horizon and for total soil (O-horizon + mineral soil to a depth of 50 cm). Data from the Swedish National Forest Soil Inventory 1993–2001 were used (1477 field plots). The O-horizon was sampled with a core sampler and carbon (C) stocks were determined. For the mineral soil layers the SOC stock was calculated based on the SOC concentrations, bulk density and content of rock fragments. The results showed that the overall mean SOC stock was 2.8 and 8.2 kg C m^–2 for O-horizon and total soil, respectively. Soil hydrological class strongly affected SOC stocks, which increased from on average 6.7 kg C m^–2 at dry sites to 9.7 kg C m^–2 at slightly moist sites. Corresponding values for the O-horizon were 2.0 to 4.4 kg C m^–2. The correlation coefficients for the linear relationship between SOC stock and site characteristics were highest for N deposition, which explained up to 25% of variation, and latitude, which explained up to 20% of variation. Altitude had the lowest degree of explanation.

Olsson, Swedish University of Agricultural Sciences, Dept of Soil and Environment, Uppsala, Sweden E-mail: mto@nn.se
Erlandsson, Swedish University of Agricultural Sciences, Dept of Soil and Environment, Uppsala, Sweden E-mail: me@nn.se
Lundin, Swedish University of Agricultural Sciences, Dept of Soil and Environment, Uppsala, Sweden E-mail: ll@nn.se
Nilsson, Swedish University of Agricultural Sciences, Dept of Soil and Environment, Uppsala, Sweden E-mail: torbjorn.nilsson@mark.slu.se
Nilsson, Swedish University of Agricultural Sciences, Dept of Soil and Environment, Uppsala, Sweden E-mail: an@nn.se
Stendahl, Swedish University of Agricultural Sciences, Dept of Soil and Environment, Uppsala, Sweden E-mail: js@nn.se

Category : Research note

article id 401, category Research note

Kari Taulavuori, Marian Sarala, Jouni Karhu, Erja Taulavuori, Eero Kubin, Kari Laine, Jarmo Poikolainen, Erkki Pesonen. (2005). Elongation of Scots pine seedlings under blue light depletion. Silva Fennica vol. 39 no. 1 article id 401. https://doi.org/10.14214/sf.401

Keywords: Scots pine; blue light; elongation; high latitude

Abstract | View details | Full text in PDF | Author Info

The effect of blue light (400–500 nm) removal on the elongation of Scots pine (Pinus sylvetris L.) seedlings was investigated in a field experiment in Northern Finland during two growing seasons. The seedlings were grown in plexiglass chambers and ambient control plots. The blue wavelengths were removed from the light spectrum by using chambers made of orange plexiglass. The results of nearly daily measurements showed that the elongation of Scots pine seedlings was increased by the removal of blue light only at high latitudes.

Taulavuori, Department of Biology, University of Oulu, PO Box 3000, FI-90014, Oulu, Finland E-mail: ktaulavu@cc.oulu.fi
Sarala, Department of Biology, University of Oulu, PO Box 3000, FI-90014, Oulu, Finland E-mail: ms@nn.fi
Karhu, Muhos Research Station, Finnish Forest Research Institute, Kirkkosaarentie 7, FI-91500 Muhos, Finland E-mail: jk@nn.fi
Taulavuori, Department of Biology, University of Oulu, PO Box 3000, FI-90014, Oulu, Finland E-mail: et@nn.fi
Kubin, Muhos Research Station, Finnish Forest Research Institute, Kirkkosaarentie 7, FI-91500 Muhos, Finland E-mail: ek@nn.fi
Laine, Department of Biology, University of Oulu, PO Box 3000, FI-90014, Oulu, Finland E-mail: kl@nn.fi
Poikolainen, Muhos Research Station, Finnish Forest Research Institute, Kirkkosaarentie 7, FI-91500 Muhos, Finland E-mail: jp@nn.fi
Pesonen, Vantaa Research Centre, Finnish Forest Research Institute, PO Box 18, FI-01301, Vantaa, Finland E-mail: ep@nn.fi

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