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.

Picea mariana (P. Mill.) B.S.P. [Black Spruce]


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
5
 
 
 Arithmetic Mean
33.6%
 
 
 Standard Error
9.2%
 
 

Individual Experiment Results

Journal References

Experimental Conditions
300 ppm
600 ppm
900 ppm

Bigras and Bertrand (2006)

Photosynthesis of well watered and fertilized plants grown from seed in containers filled with a 3:1 mix of peat:vermiculate in mini-greenhouses located within a larger greenhouse where they were exposed to environmental conditions that simulated a complete year (approximate season average)
34%

 

 

Johnsen (1993)

growth chambers, well-watered
3%

 

 

Johnsen (1993)

growth chambers, drought
 

 

 

Johnsen (1993)

growth chambers, low nutrients
60%

 

 

Johnsen (1993)

growth chambers, high nutrients
20%

 

 

Tjoelker et al. (1998)

Seedlings grown for three months in controlled environment chambers at day/night temperatures ranging from 18/12 to 30/24?C (average results)
51%

 

 

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