Percent Photosynthesis (Net CO2 Exchange Rate) Increases for
300, 600 and 900 ppm Increases in the Air's CO2 Concentration:


For a more detailed description of this table, click here.

Pinus ponderosa P. & C. Lawson [Ponderosa Pine]


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
10
 
 
 Arithmetic Mean
45.9%
 
 
 Standard Error
8.8%
 
 

Individual Experiment Results

Journal References

Experimental Conditions
300 ppm
600 ppm
900 ppm

Callaway et al. (1994)

growth chambers, 10/25°C night/day temperature
6%

 

 

Callaway et al. (1994)

growth chambers, 15/30°C night/day temperature
19%

 

 

Constable et al. (1999)

open-top chambers, 1996 needles in June 1996, no added N
109%

 

 

Constable et al. (1999)

open-top chambers, 1996 needles in June 1996, 20 g m-2 added N
54%

 

 

Constable et al. (1999)

open-top chambers, 1995 needles in June 1996, no added N
71%

 

 

Constable et al. (1999)

open-top chambers, 1995 needles in June 1996, 20 g m-2 added N
34%

 

 

Constable et al. (1999)

open-top chambers, 1995 needles in September 1996, no added N
58%

 

 

Constable et al. (1999)

open-top chambers, 1995 needles in September 1996, 20 g m-2 added N
24%

 

 

Houpis et al. (1999)

open-top chamber
42%

 

 

Olszyk et al. (2001)

SPAR units, 2 years
42%

 

 

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