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Table 6
Mass balance of nitrogen (N) and phosphorus (P) components of each pond.
| Nutrient | Component | Extensive 1 | Extensive 2 | Semi-intensive 1 | Semi-intensive 2 | Coupled 1 fish | Coupled 1 plant | Coupled 2 fish | Coupled 2 plant | |
|---|---|---|---|---|---|---|---|---|---|---|
| N (g) | Input | Fish | 506 | 517 | 969 | 928 | 934 | 0 | 959 | 0 |
| Fish feed | 0 | 0 | 1535 | 1535 | 1535 | 0 | 1535 | 0 | ||
| Fill water | 3297 | 6419 | 2400 | 3770 | 1574 | 3699 | 2897 | 2639 | ||
| Output | Fish1 | (7%) 739 | (4%) 745 | (83%) 4253 | (60%) 4099 | (84%) 3536 | (5%) 173 | (58%) 3542 | (1%) 27 | |
| (41%) 3,709 | (37%) 3579 | |||||||||
| Drained water | 1149 | 861 | 1199 | 1863 | 1211 | 3021 | 1064 | 2617 | ||
| Balance2 | 1915 | 5330 | −549 | 270 | −704 | 505 | 784 | −5 | ||
| −199 | 779 | |||||||||
| P (g) | Input | Fish | 112 | 115 | 212 | 203 | 204 | 0 | 210 | 0 |
| Fish feed | 0 | 0 | 383 | 383 | 383 | 0 | 383 | 0 | ||
| Fill water | 65 | 173 | 73 | 100 | 31 | 146 | 33 | 138 | ||
| Output | Fish1 | (83%) 167 | (32%) 170 | (156%) 925 | (143%) 891 | (135%) 761 | (26%) 38 | (134%) 766 | (5%) 7 | |
| (106%) 799 | (102%) 773 | |||||||||
| Drained water | 131 | 97 | 110 | 190 | 189 | 283 | 259 | 245 | ||
| Balance2 | −119 | 22 | −367 | −395 | −332 | −275 | −399 | −115 | ||
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