Table 1 Results of non-essential nutrients addition orthogonal experiment
Group number | CaCl2 | Na2CO3 | Citric acid | Ammonium ferric citrate | EDTA-2Na | Trace elements | Biomass productivity (mg/L/day) |
|---|---|---|---|---|---|---|---|
1 | − | − | − | + | + | − | 368.57 |
2 | + | − | + | − | + | − | 374.29 |
3 | + | + | − | + | − | − | 382.86 |
4 | − | − | + | + | − | + | 428.57 |
5 | + | + | + | + | + | + | 385.71 |
6 | + | − | − | − | − | + | 405.71 |
7 | − | + | + | − | − | − | 385.71 |
8 | − | + | − | − | + | + | 394.29 |
K + | 387.14 | 387.14 | 393.57 | 391.43 | 380.71 | 403.57 | |
K − | 394.29 | 394.29 | 387.86 | 390.00 | 400.71 | 377.86 | |
R | 7.14 | 7.14 | 5.71 | 1.43 | 20.00 | 25.71 |