300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Holcus lanatus L. [Common Velvetgrass]
300 ppm
|
600 ppm
|
900 ppm
|
|
Number of Results |
11
|
|
|
Arithmetic Mean |
38.5%
|
|
|
Standard Error |
10.4%
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
Barnard et al. (2004) |
Plants grown from seed in mesocosms in naturally-lit controlled environment chambers for 15 months
|
34%
|
|
|
Barnard et al. (2005) |
Aboveground biomass of well watered plantlets grown for 61 days in pots of a reconstituted sandy-loam soil within closed chambers in greenhouses
|
44%
|
|
|
Barnard et al. (2005) |
Belowground biomass of well watered plantlets grown for 61 days in pots of a reconstituted sandy-loam soil within closed chambers in greenhouses
|
135%
|
|
|
Hunt et al. (1991) |
pots (1 liter)
|
51%
|
|
|
Jongen and Jones (1998) |
The final of four cuttings of adequately fertilized and watered plants grown from seed in pots out-of-doors in open-top chambers for 8 months
|
53%
|
|
|
Maestre and Reynolds (2007) |
Well watered plants grown from seed in microcosms within growth chambers for 90 days with nitrogen homogeneously supplied
|
7%
|
|
|
Maestre and Reynolds (2007) |
Well watered plants grown from seed in microcosms within growth chambers for 90 days with nitrogen heterogeneously supplied
|
12%
|
|
|
Soussana et al. (2005) |
Well watered and fertilized plants grown from seed out-of-doors mixed with perennial ryegrass (Lolium perenne L.) in containers of sand in polyethylene-film tunnels and frequently cut
|
39%
|
|
|
Soussana et al. (2005) |
Well watered and fertilized plants grown from seed out-of-doors mixed with perennial ryegrass (Lolium perenne L.) in containers of sand in polyethylene-film tunnels and infrequently cut
|
9%
|
|
|
Teyssonneyre et al. (2002) |
plastic tunnels, three cuttings per year
|
13%
|
|
|
Teyssonneyre et al. (2002) |
plastic tunnels, six cuttings per year
|
26%
|
|
|