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Table 2 Mean with SD of production parameters in high and low yielding cows by parity and farm

From: Comparison of rumen bacterial communities in dairy herds of different production

  Farm 12 Farm 9
Primiparous cows Multiparous cows Primiparous cows Multiparous cows
  High Low High Low High Low High Low
(n = 12) (n = 12) (n = 12) (n = 11) (n = 10) (n = 9) (n = 9) (n = 10)
Days in milk 116 109 125 125 128 113 130 132
Milk yield (kg/d) 48.1 38.6 70.7 52.6 37.2 25.5 41.8 32.1
± 1.3 ± 1.2 ± 4.3 ± 3.3 ± 7.1 ± 2.7 ± 3.4 ± 3.4
Fat (%) 3.31 3.34 3.20 3.86 3.64 3.83 3.19 3.86
± 0.57 ± 0.61 ± 1.25 ± 0.90 ± 0.36 ± 0.62 ± 0.48 ± 0.67
Protein (%) 2.85 2.94 2.86 3.23 2.91 2.94 2.87 3.03
± 0.22 ± 0.20 ± 0.27 ± 0.28 ± 0.22 ± 0.30 ± 0.23 ± 0.23