Item | A | B | C | D | SEM | P-value |
---|---|---|---|---|---|---|
Nitrogen intake, g/d | 39.29 | 39.58 | 39.70 | 40.01 | 0.19 | 0.57 |
Fecal nitrogen, g/d | 6.27b | 5.69c | 7.26a | 6.91a | 0.17 |  < 0.001 |
Urinary nitrogen, g/d | 7.38a | 5.73b | 6.04b | 4.95c | 0.25 |  < 0.001 |
Total nitrogen excretion, g/d | 13.65a | 11.42b | 13.30a | 11.86b | 0.27 |  < 0.001 |
Absorbed nitrogen, g/d | 33.02ab | 33.52a | 31.90c | 32.70b | 0.16 |  < 0.001 |
Nitrogen retention, g/d | 25.64b | 28.16a | 26.40b | 28.15a | 0.33 |  < 0.001 |
Nitrogen apparent digestibility, % | 84.04b | 85.62a | 81.71c | 82.73c | 0.41 |  < 0.001 |
Biological value of feed protein (BVFP) | 77.66b | 84.02a | 82.78a | 86.10a | 0.94 |  < 0.001 |