300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Polygonum pensylvanicum L. [Pennsylvania Smartweed]
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
3
|
|
2
|
Arithmetic Mean |
55.7%
|
|
127%
|
Standard Error |
1.8%
|
|
15.6%
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Bazzaz and Carlson (1984) |
tubs (10.7 liters, 24 plants), water-stressed
|
54%
|
|
149%
|
Bazzaz and Carlson (1984) |
tubs (10.7 liters, 24 plants), well-watered
|
53%
|
|
105%
|
Zangerl and Bazzaz (1984) |
pots (7 liters, 36 plants)
|
60%
|
|
|