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Table 4 Effect of energy density of close-up dry period diets on milk yield and composition in Holstein cows

From: Effect of reduced energy density of close-up diets on dry matter intake, lactation performance and energy balance in multiparous Holstein cows

Item Dietary treatment1 SEM P-value
HD MD LD Diet Time Interaction
Milk yield, kg/d
  Wk 1 to 3 32.0 32.1 32.2 0.51 0.53 <0.001 0.78
  Wk 1 to 10 36.6b 38.6a 38.7a 0.36 0.03 <0.001 0.99
4% FCM yield, kg/d
  Wk 1 to 3 44.0 42.4 41.9 0.78 0.55 <0.001 0.72
  Wk 1 to 6 45.4 45.7 45.4 0.54 0.90 <0.001 0.91
Fat, %
  Wk 1 to 3 6.43a 5.87b 5.67b 0.11 0.02 0.03 0.89
  Wk 1 to 6 5.96a 5.60b 5.45b 0.06 0.006 <0.001 0.90
Protein, %
  Wk 1 to 3 3.66 3.65 3.67 0.05 0.97 <0.001 0.54
  Wk 1 to 6 3.50 3.45 3.48 0.02 0.69 <0.001 0.90
Lactose, %
  Wk 1 to 3 4.89b 5.07a 5.12a 0.03 0.02 0.02 0.28
  Wk 1 to 6 4.99 5.10 5.12 0.04 0.06 0.002 0.12
Fat, kg/d
  Wk 1 to 3 2.05 1.94 1.90 0.04 0.33 <0.001 0.70
  Wk 1 to 6 2.07 2.06 2.01 0.03 0.68 <0.001 0.89
Protein, kg/d
  Wk 1 to 3 1.17 1.20 1.21 0.03 0.57 <0.001 0.55
  Wk 1 to 6 1.22 1.26 1.28 0.01 0.19 <0.001 0.94
Lactose, kg/d
  Wk 1 to 3 1.58 1.69 1.72 0.03 0.12 <0.001 0.69
  Wk 1 to 6 1.77b 1.90a 1.91a 0.02 0.04 <0.001 0.99
  1. 1HD high energy density diet, MD middle energy density diet, LD low energy density diet.
  2. a, bValues within a row with different superscripts differ significantly at P < 0.05.