Percent Dry Weight (Biomass) Increases for
300, 600 and 900 ppm Increases in the Air's CO2 Concentration:


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

Pseudotsuga menziesii (Mirbel) Franco [Douglas Fir]


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
6
 
 
 Arithmetic Mean
9.7%
 
 
 Standard Error
3.9%
 
 

Individual Experiment Results

Journal References

Experimental Conditions
300 ppm
600 ppm
900 ppm

Gorissen (1996)

phytotrons, 3 year-old
28%

 

 

Gorissen (1996)

phytotrons, 4 year-old
6%

 

 

Gorissen et al. (1995)

greenhouse compartments, roots
14%

 

 

Gorissen et al. (1995)

greenhouse compartments, needles
10%

 

 

Olszyk et al. (2003)

Seedlings grown for 4 years in outdoor sunlit chambers at ambient air temperature under well-watered but low soil nitrogen conditions
0%

 

 

Olszyk et al. (2003)

Seedlings grown for 4 years in outdoor sunlit chambers at ambient + 3.5? air temperature under well-watered but low soil nitrogen conditions
0%

 

 

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