Table 2.
Optimal concentration combinations of four trace elements affecting the proliferation of Paenibacillus polymyxa Pp-7250
| Test number | Cu2+ (A) | Fe2+ (B) | Zn2+ (C) | Mn2+ (D) | OD600 60 h | |
|---|---|---|---|---|---|---|
| Results of the orthogonal experiment | ||||||
| 1 | 1 | 1 | 1 | 1 | 0.9379 | |
| 2 | 1 | 2 | 2 | 2 | 1.0552 | |
| 3 | 1 | 3 | 3 | 3 | 0.7374 | |
| 4 | 2 | 1 | 2 | 3 | 0.6545 | |
| 5 | 2 | 2 | 3 | 1 | 0.6614 | |
| 6 | 2 | 3 | 1 | 2 | 1.2293 | |
| 7 | 3 | 1 | 3 | 2 | 0.7192 | |
| 8 | 3 | 2 | 1 | 3 | 0.8526 | |
| 9 | 3 | 3 | 2 | 1 | 0.9106 | |
| T1 | 2.7305 | 2.3116 | 3.0198 | 2.5099 | 7.7581 | |
| T2 | 2.5452 | 2.5692 | 2.6203 | 3.0037 | ||
| T3 | 2.4824 | 2.8773 | 2.1180 | 2.2445 | ||
| The average k1 | 0.9102 | 0.7705 | 1.0066 | 0.8366 | ||
| k2 | 0.8484 | 0.8564 | 0.8734 | 1.0012 | ||
| k3 | 0.8275 | 0.9591 | 0.7060 | 0.7482 | ||
| R value | 0.0827 | 0.1886 | 0.3006 | 0.2530 | ||
| SS | df | MS | F | F0.05(2,2) | Significant | |
|---|---|---|---|---|---|---|
| Variance analysis | ||||||
| A | 0.0111 | 2 | 0.0056 | 56.0000 | 19.0000 | * |
| B | 0.0534 | 2 | 0.0267 | 267.0000 | ** | |
| C | 0.1361 | 2 | 0.0681 | 681.0000 | **** | |
| D | 0.0989 | 2 | 0.0495 | 495.0000 | *** | |
| Error | 0.0001 | 2 | ||||