Table 1 Basic information and bacterial culture of the 16 Chinese Holstein milk samples
Sample | Age | Days of lactation | SCC × 1000/mL | SCS | MY | FP | PP | Bacterium | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
−3 months | −2 months | − 1 month | −3 months | −2 months | −1 month | −3 months | −2 months | −1 month | −3 months | −2 months | −1 month | −3 months | −2 months | −1 month | ||||
SM1 | 8 | 482 | 561.00 | 911.00 | 1071.00 | 5.49 | 6.19 | 6.42 | 28.80 | 28.60 | 26.80 | 3.93 | 4.06 | 4.28 | 3.63 | 3.75 | 3.65 | S. aureus |
SM2 | 5 | 266 | 972.00 | 4641.00 | 4289.00 | 6.28 | 8.54 | 8.42 | 31.00 | 42.60 | 34.40 | 3.79 | 2.75 | 3.59 | 3.49 | 2.65 | 3.02 | S. aureus |
SM3 | 8 | 529 | 382.00 | 1076.00 | 852.00 | 4.93 | 6.43 | 6.09 | 36.70 | 37.50 | 35.80 | 2.14 | 3.97 | 4.10 | 3.38 | 2.98 | 2.91 | S. aureus |
SM4 | 5 | 291 | 155.00 | 585.00 | 241.00 | 3.63 | 5.55 | 4.27 | 31.30 | 31.30 | 24.60 | 2.10 | 3.81 | 3.52 | 3.42 | 3.29 | 3.30 | S. aureus |
Mean ± SD |  |  | 517.5 ± 149.63 | 1803.25 ± 823.94 | 1613.25 ± 787.25 | 5.08 ± 0.48 | 6.67 ± 0.56 | 6.30 ± 0.74 | 31.95 ± 1.45 | 35 ± 2.72 | 30.4 ± 2.39 | 2.99 ± 0.44 | 3.65 ± 0.26 | 3.87 ± 0.16 | 3.48 ± 0.05 | 3.17 ± 0.20 | 3.22 ± 0.14 |  |
SMD1 | 6 | 171 | 207.00 | 596.00 | 2249.00 | 4.05 | 5.58 | 7.49 | 58.00 | 50.90 | 41.60 | 3.67 | 3.46 | 3.51 | 2.96 | 3.11 | 3.24 | S. aureus |
SMD2 | 3 | 299 | 116.00 | 121.00 | 202.00 | 3.21 | 3.28 | 4.01 | 42.70 | 37.70 | 35.60 | 3.84 | 3.60 | 4.15 | 3.03 | 3.05 | 3.13 | S. aureus |
SMD3 | 3 | 125 | 283.00 | 102.00 | 64.00 | 2.99 | 1.49 | 2.96 | 25.70 | 25.50 | 24.70 | 2.76 | 3.26 | 2.85 | 3.31 | 3.06 | 3.32 | S. aureus |
SMD4 | 2 | 33 | 99.00 | 113.00 | 145.00 | 2.99 | 3.18 | 3.54 | 31.30 | 38.60 | 37.70 | 2.89 | 4.95 | 1.73 | 2.83 | 2.86 | 2.88 | S. aureus |
Mean ± SD |  |  | 176.25 ± 37.03 | 233 ± 104.84 | 665 ± 457.92 | 3.31 ± 0.22 | 3.38 ± 0.73 | 4.50 ± 0.88 | 39.43 ± 6.18 | 38.18 ± 4.49 | 34.9 ± 3.14 | 3.29 ± 0.24 | 3.82 ± 0.33 | 3.06 ± 0.45 | 3.03 ± 0.088 | 3.02 ± 0.05 | 3.14 ± 0.08 |  |
HM1 | 7 | 258 | 101.00 | 155.00 | 73.00 | 3.01 | 3.63 | 2.55 | 51.80 | 47.40 | 38.00 | 2.78 | 3.02 | 2.88 | 3.06 | 2.97 | 2.92 | – |
HM2 | 6 | 222 | 28.00 | 37.00 | 57.00 | 1.16 | 1.57 | 2.19 | 38.10 | 35.30 | 30.10 | 3.82 | 4.40 | 3.89 | 3.12 | 3.17 | 3.13 | – |
HM3 | 5 | 173 | 76.00 | 23.00 | 39.00 | 2.60 | 0.88 | 1.64 | 58.30 | 58.80 | 56.00 | 3.78 | 3.81 | 3.46 | 3.34 | 3.22 | 3.23 | – |
HM4 | 5 | 244 | 153.00 | 34.00 | 44.00 | 3.61 | 1.44 | 1.82 | 42.10 | 40.80 | 38.20 | 4.69 | 4.31 | 3.95 | 3.88 | 3.25 | 3.12 | – |
Mean ± SD |  |  | 89.5 ± 22.54 | 62.25 ± 26.90 | 53.25 ± 6.58 | 2.60 ± 0.45 | 1.88 ± 0.52 | 2.05 ± 0.17 | 47.58 ± 3.97 | 45.58 ± 4.38 | 40.58 ± 4.74 | 3.77 ± 0.34 | 3.89 ± 0.27 | 3.55 ± 0.21 | 3.35 ± 0.16 | 3.15 ± 0.05 | 3.1 ± 0.06 |  |
HMD1 | 3 | 145 | 22.00 | 19.00 | 27.00 | 0.82 | 0.60 | 1.11 | 35.70 | 40.30 | 38.80 | 3.91 | 3.66 | 3.53 | 3.01 | 3.18 | 3.08 | – |
HMD2 | 4 | 212 | 22.00 | 32.00 | 514.00 | 0.82 | 1.36 | 5.36 | 52.00 | 46.30 | 25.10 | 3.42 | 2.57 | 5.11 | 3.27 | 3.32 | 3.46 | – |
HMD3 | 3 | 271 | 60.00 | 20.00 | 61.00 | 2.26 | 0.68 | 2.29 | 42.90 | 42.70 | 35.80 | 3.31 | 3.30 | 2.60 | 3.17 | 3.14 | 3.18 | – |
HMD4 | 3 | 250 | 30.00 | 61.00 | 47.00 | 1.26 | 2.29 | 1.91 | 37.30 | 42.20 | 36.60 | 3.48 | 3.76 | 4.33 | 3.11 | 3.22 | 3.18 | – |
Mean ± SD |  |  | 33.5 ± 7.82 | 33 ± 8.48 | 162.25 ± 101.72 | 1.29 ± 0.30 | 1.23 ± 0.34 | 2.67 ± 0.81 | 41.98 ± 3.19 | 42.88 ± 1.09 | 34.08 ± 2.65 | 3.53 ± 0.11 | 3.32 ± 0.23 | 3.89 ± 0.47 | 3.14 ± 0.047 | 3.22 ± 0.03 | 3.23 ± 0.07 |  |