Table 4.
Effects of autoclave and xylose inclusion on rumen degradation parameters of cottonseed meal.
Item 1 | Control | Xylose-Treated 2 | Xylose-Untreated 2 | SEM | p-Value | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
8 | 16 | 24 | 8 | 16 | 24 | Control × Processed | Xyl.-Treated × -Untreated | Time, Lin. | Time, Quad. | Interaction Xyl. × Time | |||
Dry Matter | |||||||||||||
A, g/kg | 319 | 246 | 230 | 235 | 261 | 250 | 240 | 12.9 | <0.01 | 0.24 | 0.24 | 0.61 | 0.86 |
B, g/kg | 475 | 459 | 605 | 500 | 505 | 494 | 478 | 34.5 | 0.41 | 0.32 | 0.84 | 0.05 | 0.04 |
kd, h−1 | 0.051 | 0.072 | 0.060 | 0.053 | 0.065 | 0.065 | 0.073 | 0.01 | 0.33 | 0.56 | 0.66 | 0.76 | 0.64 |
Crude Protein | |||||||||||||
A, g/kg | 552 | 104 | 198 | 217 | 396 | 287 | 164 | 45.8 | <0.01 | 0.01 | 0.22 | 0.58 | <0.01 |
B, g/kg | 380 | 636 | 686 | 597 | 486 | 602 | 679 | 55.6 | <0.01 | 0.29 | 0.19 | 0.38 | 0.06 |
kd, h−1 | 0.077 | 0.189 | 0.080 | 0.107 | 0.102 | 0.107 | 0.179 | 0.03 | 0.15 | 0.87 | 0.94 | 0.08 | 0.02 |
1 A, water-soluble fraction; B, potentially degradable water-insoluble fraction; kd, degradation rate of fraction B; SEM, standard error of the mean. 2 Autoclave heating times: 8, 16, and 24 min (127 °C and 117 kpa of pressure).