Table 5.
Summarized results of the N balance study with piglets (BW 25 kg)
| Diets | HM (A) | SM (A) | HM (AA) | SM (AA) | SEM | p |
|---|---|---|---|---|---|---|
| n | 7 1 | 8 | 8 | 8 | ||
| Mean BW (kg) | 25.7 ± 2.5 | 25.5 ± 3.1 | 26.5 ± 2.2 | 25.1 ± 2.0 | 0.433 | 0.736 |
| DM intake (g/d) | 944 ± 103 | 928 ± 87 | 935 ± 86 | 832 ± 168 | 21.536 | 0.224 |
| N intake (mg/BWkg0.67/d) | 3675 ± 179 | 3666 ± 274 | 3645 ± 226 | 3361 ± 579 | 65.224 | 0.257 |
| N excretion feces (mg/BWkg0.67/d) | 717 ab ± 60 | 841 b ± 132 | 620 a ± 94 | 745 ab ± 123 | 23.388 | 0.004 |
| N excretion urine (mg/BWkg0.67/d) | 1087 b ± 118 | 958 ab ± 121 | 843 a ± 155 | 839 a ± 172 | 30.553 | 0.007 |
| N excretion total (mg/BWkg0.67/d) | 1805 b ± 108 | 1799 b ± 157 | 1463 a ± 146 | 1584 ab ± 289 | 41.916 | 0.040 |
| N balance (mg/BWkg0.67/d) | 1870 ± 121 | 1867 ± 199 | 2182 ± 325 | 1777 ± 420 | 57.647 | 0.053 |
| Apparent N digestibility (%) | 80.5 ab ± 1.8 | 77.1 a ± 2.7 | 82.9 b ± 3.2 | 77.7 a ± 2.7 | 0.625 | 0.001 |
| Model parameter b (×106) 2 | 184 a ± 8 | 184 a ± 14 | 225 b ± 30 | 191 ab ± 27 | 4.884 | 0.003 |
| NPUstd (%) 3 | 63.6 a ± 2.1 | 63.7 a ± 3.4 | 72.8 b ± 6.7 | 65.2 ab ± 6.6 | 1.124 | 0.004 |
| AA efficiency | ||||||
| bc−1Lys (×106) | 32 ab ± 1 | 35 b ± 3 | 33 ab ± 4 | 30 a ± 4 | 0.685 | 0.032 |
| bc−1Met (×106) | 137 b ± 6 | 112 a ± 8 | 112 a ± 15 | 97 a ± 14 | 3.194 | <0.001 |
| bc−1Thr (×106) | 54 b ± 3 | 49 ab ± 4 | 58 b ± 8 | 50 ab ± 7 | 1.206 | 0.026 |
| bc−1Leu (×106) | 30 b ± 1 | 26 a ± 2 | 37 c ± 5 | 27 ab ± 4 | 0.982 | <0.001 |
| bc−1His (×106) | 73 a ± 3 | 118 c ± 9 | 91 b ± 12 | 125 c ± 18 | 4.275 | <0.001 |
BW: body weight; DM: dry matter; NPUstd: standardized net protein utilization; HM (A): Hermetia meal with Lys (80%); SM (A): Spirulina meal with Lys (80%); HM (AA): Hermetia meal with extended AA supply; SM (AA): Spirulina meal with extended AA supply; SEM: standard error of the mean; p: p-value; a–c values within a row with different superscripts are significantly different (p < 0.05). 1 Outlier (α= 0.05) according to Dixon and Massey [42]. 2 Applied for NPU standardization based on: NMR = 433 mg/BWkg0.67/d; NRmaxT = 4697 mg/BWkg0.67/d. 3 Standardized daily N intake = 3500 mg/BWkg0.67.