Skip to main content

Table 1 Composition and nutrient levels of the experimental diets (on a dry matter basis)

From: Effects of dietary energy levels on rumen bacterial community composition in Holstein heifers under the same forage to concentrate ratio condition

Items Treatments
L M H
Ingredient
 Chinese wildrye 12.50 12.50 12.50
 Dry alfalfa hay 16.50 16.50 16.50
 Corn silage 21.00 21.00 21.00
 Corn 12.90 18.12 27.85
 Wheat bran 12 10 8.29
 Soybean meal 5 4.44 4
 DDGS a 5 5 4.86
 Cottonseed meal 4.02 3 3
 Rice hull powder 9.08 7.44 0
 Premixb 2.00 2.00 2.00
 Total 100.00 100.00 100.00
Nutrient level
 Dry matter (%) 89.43 89.45 89.64
 Metabolizable energyc(MJ/kg) 9.34 10.08 10.88
 CPd (%) 14.09 14.06 14.12
 NDF d (%) 50.52 48.27 42.74
 ADF d (%) 35.13 33.41 29.19
 Ash (%) 7.61 6.93 5.69
 Calcium (%) 0.97 0.94 0.92
 Phosphorous (%) 0.46 0.46 0.46
  1. aDDGS, distillers dried grains with soluble
  2. bManufactured by the Precision Animal Nutrition Research Centre, Beijing, China. Premix provided the following per kg of concentrate: vitamin A, 30150 IU; vitamin D, 9675 IU; vitamin E, 76.5 mg; Fe, 132 mg; Cu, 26 mg; Mn, 118.30 mg; Zn, 166 mg; Se, 0.07 mg; I, 0.11 mg; Co, 0.03 mg; Ca, 6.76 g; P, 0.68 g
  3. cMetabolizable energy was calculated according to the Nutrient Requirements of Dairy Cattle (NRC, 2001)
  4. dCP, Crude protein; NDF, Neutral detergent fiber; ADF, Acid detergent fiber