300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Grassland [High-species-diversity temperate grazed in New Zealand]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
3
|
|
|
| Arithmetic Mean |
70.7%
|
|
|
| Standard Error |
37.8%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Allard et al. (2005) |
Winter-Spring root biomass near the end of a four-year FACE study
|
29%
|
|
|
|
Allard et al. (2005) |
Summer-Fall root biomass near the end of a four-year FACE study
|
163%
|
|
|
|
Newton et al. (2010) |
A 50-year-old pasture containing a 25-species mix of C3 and C4 grasses, forbs and legumes that was fertilized yearly with P, K and S -- but received its N naturally from legumes -- which was grazed by sheep for a period of four days an average of 5.6 times per year
|
20%
|
|
|