Criteria | Treatment2 | SEM3 | P-value4 | |||||
---|---|---|---|---|---|---|---|---|
PC | SBP3 | SBP6 | SBP9 | SBP12 | Lin. | Quad. | ||
Nutrient digestibility,% | ||||||||
 Dry matter | 87.08 | 89.24 | 87.31 | 88.15 | 89.07 | 0.534 | 0.49 | 0.95 |
 Crude protein | 85.13 | 87.55 | 86.06 | 85.10 | 86.25 | 0.553 | 0.96 | 0.69 |
 Crude ash | 57.00 | 71.15 | 66.92 | 65.85 | 71.31 | 2.013 | 0.08 | 0.35 |
 Crude fat | 76.09 | 84.05 | 79.31 | 81.34 | 86.40 | 1.425 | 0.07 | 0.93 |
 Crude fiber | 55.07b | 66.64ab | 62.92ab | 74.14a | 75.84a | 2.601 | 0.05 | 0.49 |
 ADF | 44.89b | 56.89ab | 53.92ab | 64.58a | 66.49a | 2.741 | 0.07 | 0.58 |
 NDF | 61.43c | 68.64bc | 67.89bc | 73.61ab | 76.77a | 1.681 | 0.02 | 0.40 |
Nitrogen retention, g/d | ||||||||
 N intake | 20.16 | 20.27 | 19.92 | 19.66 | 20.18 | 0.059 | - | - |
 Fecal N | 3.00 | 2.52 | 2.78 | 2.93 | 2.77 | 0.110 | 0.96 | 0.60 |
 Urinary N | 5.74 | 4.39 | 7.13 | 4.50 | 4.21 | 0.394 | 0.21 | 0.24 |
 N retention5 | 11.42 | 13.36 | 10.02 | 12.22 | 13.19 | 0.447 | 0.37 | 0.26 |