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Table 3 Average weekly milk production, milk composition, DMI and EB in the two groups of cows during the first 7 weeks postpartum

From: Energy balance, leptin, NEFA and IGF-I plasma concentrations and resumption of post partum ovarian activity in swedish red and white breed cows

Week after calving 1 2 3 4 5 6 7 S.E. P
           ovarian resumption day ovarian resumption × day
Milk yield (kg/day) A 17 19 24 23 25 26 27 2.67 NS * NS
  B 21 19 20 23 25 25 27     
Milk Fat (%) A 7.03 5.31 4.53 4.48 4.65 4.41 4.70 0.47 NS ** NS
  B 7.10 5.40 4.18 4.53 4.53 4.50 4.55     
Milk Protein (%) A 3.53 3.83 3.78a 3.34 3.15 3.20 3.18 0.17 * * NS
  B 3.60 3.37 3.25b 3.28 3.08 3.23 3.03     
DMI (kg/day) A 11.3 14.5 15.5 15.8 18.0 17.9 19.3 1.28 NS ** NS
  B 11.2 11.8 13.6 16.9 17.1 17.5 18.6     
Energy Balance (MJ/day) A -28.66 -7.64 -12.66 -3.81 2.65 1.52 5.80 8.31 NS ** NS
  B -42.60 -27.48 -2.40 8.19 3.90 4.31 5.71     
  1. a,b,* P – value < 0.05.
  2. ** P – value < 0.01