300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Ecosystem [Lolium perenne (Perennial Ryegrass), Trifolium repens L. (White Clover), Agrostis capillaris L. (Colonial Bentgrass), Rytidosperma clavatum (Zotov) Connor et Edgar comb. nov., Festuca arundinacea Schreb., Paspalum dilatatum (Dallas Grass), Digitaria sanguinalis (Hairy Crabgrass), Sporobolus africanus (Poir.) Robyns & Tourn. (Rattail Grass), Setaria geniculata (Lam.) Beauv. (Yellow Bristlegrass), Trifolium subterraneum L. (Subterraneum Clover), Poa annua L. (Annual Bluegrass) and Lotus corniculatus L. (Birdfoot Deervetch)]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
3
|
|
|
| Arithmetic Mean |
22.7%
|
|
|
| Standard Error |
5.5%
|
|
|
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Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Campbell et al. (1995) |
controlled environment rooms, 12/7 °C,8 weeks
|
14%
|
|
|
|
Campbell et al. (1995) |
controlled environment rooms, 18/13 °C,6 weeks
|
18%
|
|
|
|
Campbell et al. (1995) |
controlled environment rooms, 28/23 °C,4 weeks
|
36%
|
|
|