300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Ilex aquifolium L. [English Holly]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
1
|
|
|
| Arithmetic Mean |
15%
|
|
|
| Standard Error |
0%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Hattenschwiler and Korner (2003) |
Plants grown from seed for three years beneath the canopy of the 120-year-old Hofstetten Experimental Forest near Basel, Switzerland, in open-top chambers exposed to light of approximately 2.2% the intensity of full sunlight
|
15%
|
|
|