| | |
Day 3
|
Day 5
|
Mean dry weight production
|
|---|
|
Day 0 - 3
|
|---|
|
CO2treatment
|
PFD
|
pH
|
O2(mg l-1)
|
Dry w. (mg l-1)
|
pH
|
Dry w. (mg l-1)
|
mg l-1day-1
|
g m-2day-1
|
g mol-1
|
|---|
|
2.6% C
|
75
|
7.1±0.0
|
7.5±0.2
|
798±27
|
6.9±0.1
|
1360±149
|
266±9
|
16.2±0.6
|
2.50±0.09
|
|
2.6% C
|
300
|
7.0±0.1
|
8.3±0.1
|
3297±46
|
6.8±0.1
|
3040±94
|
1099±15
|
67.0±0.9
|
2.59±0.04
|
|
2.5% Fl
|
75
|
7.3±0.1
|
7.8±0.4
|
877±84
|
7.1±0.1
|
1338±88
|
292±28
|
17.8±1.7
|
2.74±0.26
|
|
2.5% Fl
|
300
|
7.0±0.0
|
8.5±0.1
|
3527±48
|
6.8±0.1
|
3423±91
|
1175±16
|
71.7±0.9
|
2.77±0.04
|
|
6.7% Fl
|
75
|
7.0±0.1
|
7.0±0.3
|
845±36
|
6.6±0.1
|
1343±70
|
282±12
|
17.2±0.8
|
2.64±0.12
|
|
6.7% Fl
|
300
|
6.7±0.0
|
7.5±0.2
|
3663±124
|
6.4±0.2
|
3343±91
|
1221±41
|
74.5±2.5
|
2.89±0.10
|
|
11.4% Fl
|
75
|
6.8±0.1
|
6.4±0.2
|
777±14
|
6.5±0.1
|
1147±23
|
259±5
|
15.8±0.3
|
2.43±0.04
|
|
11.4% Fl
|
300
|
6.7±0.1
|
7.3±0.2
|
2933±36
|
6.5±0.1
|
2843±45
|
978±12
|
59.6±0.7
|
2.30±0.03
|
|
F-value and significance level:
| | | |
|
CO2
| |
64.5***
|
50.9***
|
17.6***
|
25.6***
|
3.54*
|
17.6***
|
17.6***
|
5.73**
|
|
PFD
| |
91.1***
|
77.4***
|
3512***
|
10.7**
|
403***
|
3511***
|
3511***
|
0.51
|
|
CO2 x PFD
| |
3.79*
|
0.59
|
10.9***
|
1.32
|
1.25
|
10.9***
|
10.9***
|
0.89
|
- The productivity during the first three days was calculated as the increase in culture concentration, in g dry weight production per m2 and day, as well as in g dry weight produced per mol of photosynthetic active radiation. F-values and significance levels are stated as follows: *p<0.05; **p<0.01; ***p<0.001.
