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- Title
Carbon and nitrogen stocks in Norwegian forest soils - the importance of soil formation, climate, and vegetation type for organic matter accumulation<sup>1</sup>.
- Authors
Strand, Line Tau; Callesen, Ingeborg; Dalsgaard, Lise; de Wit, Heleen A.
- Abstract
Relationships between soil C and N stocks and soil formation, climate, and vegetation were investigated in a gridded database connected to the National Forest Inventory in Norway. For mineral soil orders, C and N stocks were estimated to be 11.1-19.3 kg C·m−2 and 0.41-0.78 kg N·m−2, respectively, declining in the following order: Gleysols > Podzols > Brunisols > Regosols. Organic peat-type soils stored, on average, 31.3 kg C·m−2 and 1.10 kg N·m−2, whereas shallow Organic folisols stored, on average, 10.2 kg C·m−2 and 0.34 kg N·m−2. For Norway's 120 000 km2 of forest, the total of soil C stocks was estimated to be 1.83 Gt C, with a 95% CI of 1.71-1.95 Gt C. Podzolic soils comprise the largest soil group and store approximately 50% of the forest soil C. Sixty percent of the soil C stock in Podzolic soils was stored in the mineral soil, increasing with temperature and precipitation. Poorly drained soil types store approximately 47% of the total forest soil C in Norway. Soils with water saturation have large C stocks mainly in the forest floor, suggesting that they are more susceptible to forest management and environmental change. Soil C stocks under pine and spruce forests were similar, although pine forests had larger C stocks in the forest floor, while spruce forests had the highest C stocks in the mineral soil compartment. C stocks in the forest floor increase from dry to moist ground vegetation, while ground vegetation nutrient classes reflect better the C and N stocks in the mineral soil.
- Subjects
NITROGEN content of forest soils; CARBON in soils; SOIL formation; HUMUS; TAIGAS; SOIL science
- Publication
Canadian Journal of Forest Research, 2016, Vol 46, Issue 12, p1459
- ISSN
0045-5067
- Publication type
Article
- DOI
10.1139/cjfr-2015-0467