300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Picea sitchensis (Bong.) Carr. [Sitka Spruce]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
7
|
|
|
| Arithmetic Mean |
20.7%
|
|
|
| Standard Error |
5%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Centritto et al. (1999a) |
open-top chamber
|
36%
|
|
|
|
Centritto et al. (1999b) |
open-top chamber
|
36%
|
|
|
|
Liu et al. (2002) |
three years, pots in open-top chambers, well fertilized and watered
|
10%
|
|
|
|
Liu et al. (2002) |
Three years, pots in open-top chambers, well fertilized and watered. Two additional years, growing in ground in open-top chambers with extra nitrogen
|
13%
|
|
|
|
Liu et al. (2002) |
Three years, pots in open-top chambers, well fertilized and watered. Two additional years, growing in ground in open-top chambers, nitrogen-deficient
|
18%
|
|
|
|
Murray et al. (2000) |
open-top chamber, low soil nitrogen
|
0%
|
|
|
|
Murray et al. (2000) |
open-top chamber, high soil nitrogen
|
32%
|
|
|