300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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European Beech (Fagus sylvatica L.) and Norway Spruce (Picea abies L.) Ecosystem
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
6
|
|
|
Arithmetic Mean |
45.5%
|
|
|
Standard Error |
12.5%
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Sonnleitner et al. (2001) |
Leaf biomass of plants grown for three years in an acidic sandy loam soil in open-top chambers near Zurich, Switzerland
|
29%
|
|
|
Sonnleitner et al. (2001) |
Root biomass of plants grown for three years in an acidic sandy loam soil in open-top chambers near Zurich, Switzerland
|
37%
|
|
|
Sonnleitner et al. (2001) |
Leaf biomass of plants grown for three years in a calcareous loamy sand in open-top chambers near Zurich, Switzerland
|
23%
|
|
|
Sonnleitner et al. (2001) |
Root biomass of plants grown for three years in a calcareous loamy sand in open-top chambers near Zurich, Switzerland
|
27%
|
|
|
Wiemken et al. (2001) |
Fine-root biomass of eedlings grown on nutrient poor soil in open-top chambers for four years
|
45%
|
|
|
Wiemken et al. (2001) |
Fine-root biomass of eedlings grown on nutrient rich soil in open-top chambers for four years
|
112%
|
|
|