Table 1.
Items | 7 d | 21 d | SEM | P-value | ||||||
---|---|---|---|---|---|---|---|---|---|---|
CON | FR | SR | CON | FR | SR | Treatment | Time | Interaction | ||
Glycolipid metabolism | ||||||||||
BHBA, mmol/L | 1.47A | 1.34C | 1.45A | 1.59A | 1.49B | 1.51AB | 0.033 | 0.01 | < 0.01 | 0.27 |
NEFA, μmol/L | 93.71 | 95.37 | 98.04 | 99.73 | 94.54 | 99.88 | 3.494 | 0.54 | 0.35 | 0.52 |
GLU, mmol/L | 3.18 | 3.19 | 2.68 | 3.30 | 3.34 | 2.74 | 0.207 | 0.05 | 0.30 | 0.92 |
TG, mmol/L | 0.04 | 0.03 | 0.04 | 0.04 | 0.05 | 0.06 | 0.012 | 0.44 | 0.20 | 0.80 |
TC, mmol/L | 2.02 | 2.43 | 2.00 | 3.28 | 3.60 | 3.39 | 0.295 | 0.48 | < 0.01 | 0.80 |
INS, mIU/L | 13.96 | 15.72 | 12.34 | 16.17 | 14.14 | 13.22 | 1.233 | 0.14 | 0.59 | 0.23 |
Cort, ng/mL | 17.86AB | 17.12B | 17,51AB | 19.65A | 17.68AB | 20.08A | 0.641 | 0.03 | < 0.01 | 0.25 |
RQUICKI2 | 0.54 | 0.52 | 0.58 | 0.51 | 0.53 | 0.56 | 0.017 | 0.07 | 0.20 | 0.28 |
Immune indices | ||||||||||
IgA, μg/mL | 93.84 | 96.48 | 97.04 | 104.14 | 104.45 | 100.99 | 3.334 | 0.89 | 0.01 | 0.61 |
IgG, mg/mL | 11.20 | 10.56 | 10.64 | 11.02 | 12.25 | 11.26 | 0.476 | 0.60 | 0.07 | 0.14 |
IgM, mg/mL | 0.65 | 0.63 | 0.62 | 0.66 | 0.68 | 0.68 | 0.018 | 0.95 | < 0.01 | 0.09 |
Antioxidant indices | ||||||||||
GSH-Px, μmol/L | 6.50B | 6.32B | 8.27A | 6.42B | 5.10C | 6.81B | 0.570 | 0.01 | 0.05 | 0.43 |
SOD, U/mL | 73.23 | 68.66 | 71.05 | 70.02 | 70.71 | 73.47 | 2.208 | 0.53 | 0.79 | 0.31 |
MDA, nmol/mL | 1.23 | 1.24 | 1.31 | 1.30 | 1.28 | 1.32 | 0.046 | 0.34 | 0.21 | 0.74 |
T-AOC, U/mL | 10.36 | 10.64 | 10.13 | 10.41 | 11.51 | 10.41 | 0.638 | 0.37 | 0.43 | 0.79 |
Microbial compositions | ||||||||||
D-LA, μmol/L | 6.19A | 5.87AB | 5.60B | 5.70B | 6.42A | 6.46A | 0.164 | 0.49 | 0.03 | < 0.01 |
DAO, U/mL | 3.37C | 3.53BC | 3.37C | 3.23C | 4.30A | 3.87B | 0.132 | < 0.01 | < 0.01 | 0.01 |
LPS, EU/mL | 0.83A | 0.72B | 0.73B | 0.80A | 0.72B | 0.76BC | 0.036 | 0.02 | 0.95 | 0.39 |
Other indices | ||||||||||
SAA, µg/mL | 26.33BC | 25.41C | 24.31C | 29.56AB | 26.16BC | 30.85A | 1.027 | 0.05 | < 0.01 | 0.02 |
TNF-α, ng/L | 131.08B | 150.80A | 135.77B | 139.46B | 135.94B | 156.05A | 4.356 | 0.05 | 0.20 | < 0.01 |
BHBA β-hydroxybutyric acid, NEFA Nonesterified fatty acid, GLU Glucose, TG Triglyceride, TC Total cholesterol, INS Insulin cortisol, IgA Immunoglobulin A, IgG Immunoglobulin G, IgM Immunoglobulin M, GSH-Px Glutathione peroxidase, SOD Superoxide dismutase, MDA Malondialdehyde, T-AOC Total antioxidant capacity, D-LA D-lactic acid, DAO Diamine oxidase, LPS Lipopolysaccharide, SAA Serum amyloid A, TNF-α Tumor necrosis factor-α
1The dairy cows in the CON group received 10 L saline daily
2Revised quantitative insulin sensitivity check index (RQUICKI) = 1/[log(GLU) + log(INS) + log(NEFA)] [24]
A–CDifferent superscript letters in each indicator represent a significant difference (P < 0.05)