300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Pseudotsuga menziesii (Mirbel) Franco [Douglas Fir]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
6
|
|
|
| Arithmetic Mean |
9.7%
|
|
|
| Standard Error |
3.9%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Gorissen (1996) |
phytotrons, 3 year-old
|
28%
|
|
|
|
Gorissen (1996) |
phytotrons, 4 year-old
|
6%
|
|
|
|
Gorissen et al. (1995) |
greenhouse compartments, roots
|
14%
|
|
|
|
Gorissen et al. (1995) |
greenhouse compartments, needles
|
10%
|
|
|
|
Olszyk et al. (2003) |
Seedlings grown for 4 years in outdoor sunlit chambers at ambient air temperature under well-watered but low soil nitrogen conditions
|
0%
|
|
|
|
Olszyk et al. (2003) |
Seedlings grown for 4 years in outdoor sunlit chambers at ambient + 3.5? air temperature under well-watered but low soil nitrogen conditions
|
0%
|
|
|