Table 4.
Constants of main nutrient degradation and RUP of the four experimental diets (n = 5)
| Items2 | Treatment1 | SEM | Contrasts | ||||
|---|---|---|---|---|---|---|---|
| Control | 8SBP | 16SBP | 24SBP | Linear | Quadratic | ||
| DM degradation | |||||||
| a,% | 15.1 | 15.1 | 16.4 | 15.0 | 0.42 | 0.410 | 0.026 |
| b,% | 56.3 | 58.2 | 59.3 | 61.9 | 1.26 | 0.001 | 0.685 |
| c,% | 2.77 | 2.8 | 2.84 | 3.18 | 0.06 | <0.0001 | 0.072 |
| dg | 41.7 | 42.8 | 44.8 | 46.3 | 0.88 | 0.001 | 0.803 |
| NDF degradation | |||||||
| a,% | 4.62 | 4.17 | 5.59 | 5.17 | 0.223 | 0.003 | 0.927 |
| b,% | 67.4 | 68.5 | 72.3 | 74.7 | 2.82 | 0.001 | 0.212 |
| c,% | 2.08 | 2.30 | 2.30 | 2.54 | 0.149 | 0.020 | 0.929 |
| Dg | 31.7 | 33.2 | 36.4 | 38.8 | 1.31 | <0.0001 | 0.370 |
| CP degradation | |||||||
| a,% | 20.6 | 22.6 | 22.2 | 20.6 | 1.12 | 0.674 | 0.050 |
| b,% | 63.3 | 63.2 | 66.3 | 63.1 | 1.61 | 0.950 | 0.092 |
| c,% | 3.37 | 3.35 | 3.59 | 3.50 | 0.139 | 0.843 | 0.238 |
| dg | 53.6 | 56.0 | 57.7 | 53.9 | 0.95 | 0.570 | 0.001 |
| RUP,% of CP | 46.4 | 44.0 | 42.3 | 46.1 | 0.95 | 0.570 | 0.001 |
SBP = sea buckthorn pomace.
a–cMeans within a row with different superscripts differ (P< 0.05).
1Control = 0% of DM SBP, 8SBP = 7.8% of DM SBP, 16SBP = 16.0% of DM SBP, 24SBP = 23.5% of DM SBP.
2 a = the rapidly degradable fraction in the rumen and b = the fraction slowly degraded at rate c (c > 0), dg = degradability; dg = a + bc/(c + kp) (Ørskov et al., 1980), assuming a passage rate (kp) of 3.1%/h (García et al., 1995).