Item | Treatmentsa | SEM | P-valueb | |
---|---|---|---|---|
CON | PLS | |||
Microbial populations | ||||
Ruminococcus flavefaciens* | 1.18 | 10.77 | 2.79 | 0.09 |
Fibrobacter succinogenes* | 0.13 | 0.32 | 0.04 | < 0.01 |
Streptococcus bovis* | 1.07 | 4.61 | 0.51 | < 0.01 |
Prevotella spp.* | 3.81 | 12.91 | 0.90 | < 0.01 |
Butyrivibrio proteoclasticus* | 2.19 | 9.97 | 1.93 | 0.04 |
Ruminococcus albus* | 0.36 | 0.39 | 0.45 | 0.74 |
Butyrivibrio fibrisolvens* | 0.36 | 2.82 | 0.51 | 0.01 |
Lactobacillus spp.* | 0.64 | 0.58 | 0.04 | 0.46 |
Megasphaera elsdenii* | 3.98 | 16.64 | 1.82 | < 0.01 |
Total bacteria, × 109/mL | 7.15 | 6.86 | 0.20 | 0.51 |
Total archaea, × 108/mL | 6.28 | 5.28 | 0.19 | < 0.01 |
Methanobacteriales, × 108/mL | 4.33 | 3.44 | 0.15 | < 0.01 |
Methanomicrobiales, × 107/mL | 3.82 | 3.21 | 0.13 | < 0.01 |
Dry matter intake | 23.2 | 22.9 | 0.08 | 0.07 |
Total-tract digestibility c, g/kg DM | ||||
DM | 631 | 618 | 4.42 | 0.15 |
OM | 660 | 654 | 5.34 | 0.61 |
NDF | 497 | 514 | 10.4 | 0.46 |
CP | 616 | 584 | 6.07 | < 0.01 |
EE | 696 | 747 | 11.1 | 0.02 |
CH4, g/d | 459 | 410 | 9.80 | < 0.01 |
CH4, g/kg DMI | 22.1 | 19.5 | 0.29 | < 0.01 |
CO2, g/d | 11,403 | 12,008 | 203 | 0.97 |
CO2, g/kg DMI | 504 | 511 | 7.38 | 0.74 |