5. Results
5.1. Biomass and Production of the Tree, Shrub and Field Layers
Biomass and primary production are essential as carrier substances of the elements treated in this paper, so the
results presented by Andersson (1970b) for the Linnebjer nature reserve are summarised here. Tree biomass (B)
of the mixed forest was estimated to be 238 t∙ha−1, with 201 aboveground and 38 t∙ha−1 belowground (Table 1).
Yearly above-ground primary production (PP) was estimated to be 13.3 t∙ha−1∙ yr−1. This included plant losses
by death and shedding (L), which amounted to 0.7 t∙ha−1∙ yr−1, and plant losses by consumers (G), which
amounted to 0.4 t∙ha−1∙ yr−1. The below-ground production of tree and understory layers was estimated to be
roughly 1.8 t∙ha−1∙ yr−1 and fine root biomass production 0.5 t∙ha−1∙yr−1 (Table 1). The above-ground biomass of
the field layer was 0.06 - 0.2 t∙ha−1 and its below-ground biomass was 2.4 - 2.6 t∙ha−1 (Table 1 and Table 2).
5.2. Element Amounts and Their Distribution in Biomass and in Production Fractions
of the Tree, Shrub and Field Layers
The carbon content in the above-ground fraction of trees and shrubs was 114 t∙ha−1 and that in the below-ground
fraction was 19 t∙ha−1. A factor of 2 is often accepted for conversion of carbon to biomass. The nitrogen content
was 0.81 t∙ha−1 in above-ground tree and shrub biomass including also the field layer and 0.32 t∙ha−1 in belowground
biomass. For the finer fractions, a higher relative content was found. The field layer above and below
ground contained minor amounts of elements (Table 2 and Table 3).
5. Results
5.1. Biomass and Production of the Tree, Shrub and Field Layers
Biomass and primary production are essential as carrier substances of the elements treated in this paper, so the
results presented by Andersson (1970b) for the Linnebjer nature reserve are summarised here. Tree biomass (B)
of the mixed forest was estimated to be 238 t∙ha−1, with 201 aboveground and 38 t∙ha−1 belowground (Table 1).
Yearly above-ground primary production (PP) was estimated to be 13.3 t∙ha−1∙ yr−1. This included plant losses
by death and shedding (L), which amounted to 0.7 t∙ha−1∙ yr−1, and plant losses by consumers (G), which
amounted to 0.4 t∙ha−1∙ yr−1. The below-ground production of tree and understory layers was estimated to be
roughly 1.8 t∙ha−1∙ yr−1 and fine root biomass production 0.5 t∙ha−1∙yr−1 (Table 1). The above-ground biomass of
the field layer was 0.06 - 0.2 t∙ha−1 and its below-ground biomass was 2.4 - 2.6 t∙ha−1 (Table 1 and Table 2).
5.2. Element Amounts and Their Distribution in Biomass and in Production Fractions
of the Tree, Shrub and Field Layers
The carbon content in the above-ground fraction of trees and shrubs was 114 t∙ha−1 and that in the below-ground
fraction was 19 t∙ha−1. A factor of 2 is often accepted for conversion of carbon to biomass. The nitrogen content
was 0.81 t∙ha−1 in above-ground tree and shrub biomass including also the field layer and 0.32 t∙ha−1 in belowground
biomass. For the finer fractions, a higher relative content was found. The field layer above and below
ground contained minor amounts of elements (Table 2 and Table 3).
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