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


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Trifolium repens L. [White Clover]


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
22
22
22
 Arithmetic Mean
49.4%
0%
0%
 Standard Error
7.4%
0
0%

Individual Experiment Results

Journal References
Experimental Conditions
300 ppm
600 ppm
900 ppm

Aeschlimann et al. (2005)
Nine-year-long FACE study
40%

Almeida et al. (1999)
growth cabinets, .0027 mM P, morning
62%

Almeida et al. (1999)
growth cabinets, .0027 mM P, afternoon
20%

Almeida et al. (1999)
growth cabinets, .075 mM P, morning
66%

Almeida et al. (1999)
growth cabinets, .67 mM P, morning
29%

Almeida et al. (1999)
growth cabinets, .67 mM P, afternoon
0%

Almeida et al. (1999)
growth cabinets, 2 mM P, morning
75%

Almeida et al. (1999)
growth cabinets, 2 mM P, afternoon
40%

Clark et al. (1999)
Large pasture turves grown for 324 days in controlled environment rooms under well-watered conditions, after which they were subjected to a soil moisture deficit and then watered and allowed to recover; well-watered
43%

Clark et al. (1999)
Large pasture turves grown for 324 days in controlled environment rooms under well-watered conditions, after which they were subjected to a soil moisture deficit and then watered and allowed to recover; water-stressed
171%

Dale and Press (1998)
growth cabinets, infected
100%

Dale and Press (1998)
growth cabinets, uninfected
48%

Davey et al. (1999)
open-top chamber, moderate nutrients
22%

Davey et al. (1999)
open-top chamber, low nutrients
65%

Greer et al. (2000)
controlled environment chambers, 18 °C
32%

Greer et al. (2000)
controlled environment chambers, 28 °C
65%

Lehnherr et al. (1985)
growth chambers, air temperature 10?C
14%

Lehnherr et al. (1985)
growth chambers, air temperature 30?C
49%

Newton et al. (1995)
controlled environment rooms
43%

Nijs et al. (1988)
containers, greenhouse
39%

Overdieck and Bossemeyer (1985)
glasshouse
50%

von Caemmerer et al. (2001)
Two-year grazed pasture FACE study
14%


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