300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Ambrosia artemisiifolia L. [Annual Ragweed]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
13
|
|
1
|
| Arithmetic Mean |
28.8%
|
|
110%
|
| Standard Error |
7%
|
|
0%
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Bazzaz and Carlson (1984) |
tubs (10.7 liters, 24 plants), water-stressed
|
33%
|
|
|
|
Bazzaz and Carlson (1984) |
tubs (10.7 liters, 24 plants), well-watered
|
57%
|
|
110%
|
|
Bazzaz and Garbutt (1988) |
pots (13-cm diameter, 16 plants)
|
25%
|
|
|
|
Hirose et al. (1996) |
glasshouse
|
25%
|
|
|
|
Miyagi et al. (2007) |
Whole plant biomass (at flowering) of well watered and fertilized plants grown from seed in 4-liter pots filled with sand out-of-doors in open-top chambers to the time of their natural death
|
-8%
|
|
|
|
Miyagi et al. (2007) |
Whole plant biomass (at time of death) of well watered and fertilized plants grown from seed in 4-liter pots filled with sand out-of-doors in open-top chambers to the time of their natural death
|
7%
|
|
|
|
Miyagi et al. (2007) |
Seed or grain yield biomass of well watered and fertilized plants grown from seed to maturity in 4-liter pots filled with sand out-of-doors in open-top chambers
|
-15%
|
|
|
|
Rogers et al. (2006) |
Aboveground biomass of well watered and fertilized plants grown from seed to maturity in glasshouse modules
|
15%
|
|
|
|
Stinson and Bazzaz (2006) |
Shoot biomass from an open-top-chamber study of non-water-stressed plants grown from the seedling stage for an entire season near Boston, Massachusetts
|
36%
|
|
|
|
Stinson and Bazzaz (2006) |
Root biomass from an open-top-chamber study of non-water-stressed plants grown from the seedling stage for an entire season near Boston, Massachusetts
|
39%
|
|
|
|
Stinson and Bazzaz (2006) |
Reproductive structures biomass from an open-top-chamber study of non-water-stressed plants grown from the seedling stage for an entire season near Boston, Massachusetts
|
78%
|
|
|
|
Stinson and Bazzaz (2006) |
Total biomass from an open-top-chamber study of non-water-stressed plants grown from the seedling stage for an entire season near Boston, Massachusetts
|
58%
|
|
|
|
Zangerl and Bazzaz (1984) |
pots (7 liters, 36 plants)
|
25%
|
|
|