300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Pteridium aquilinum [Bracken]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
4
|
|
|
| Arithmetic Mean |
45.3%
|
|
|
| Standard Error |
20.5%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Caporn et al. (1999) |
Plants grown for 19 months in controlled environment chambers at normal and high levels of soil fertility
|
0%
|
|
|
|
Zheng et al. (2008) |
Fronds of well watered and fertilized three-week-old plants grown from rhizome cuttings for 20 more days in pots containing 1 kg of local topsoil with no copper (Cu) contamination (0 mg Cu/kg soil), while exposed to CO2 enrichment from only 08:00 to 11:00 a.m. on days that were sunny
|
33%
|
|
|
|
Zheng et al. (2008) |
Fronds of well watered and fertilized three-week-old plants grown from rhizome cuttings for 20 more days in pots containing 1 kg of local topsoil contaminated with copper (Cu) at 50 mg Cu/kg soil, while exposed to CO2 enrichment from only 08:00 to 11:00 a.m. on days that were sunny
|
36%
|
|
|
|
Zheng et al. (2008) |
Fronds of well watered and fertilized three-week-old plants grown from rhizome cuttings for 20 more days in pots containing 1 kg of local topsoil contaminated with copper (Cu) at 150 mg Cu/kg soil, while exposed to CO2 enrichment from only 08:00 to 11:00 a.m. on days that were sunny
|
112%
|
|
|