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Table 1 Ingredients and chemical compositions of the 3 experimental diets

From: Effects of the dietary nonfiber carbohydrate content on lactation performance, rumen fermentation, and nitrogen utilization in mid-lactation dairy cows receiving corn stover

Items Treatmenta
AH L-NFC H-NFC
Dietary ingredient, g/kg of DM
 Alfalfa hay 149 0.0 0.0
 Oat hay 49.5 44.1 46.8
 Corn stover 0.0 147 148
 Corn silage 267 257 266
 Ground corn grain 297 229 299
 Wheat bran 49.5 103 5.4
 Soybean meal 99.0 177 175
 Cottonseed meal 49.5 4.9 21.2
 Premixb 39.6 38.2 39.4
Chemical compositionc, % of DM
 Dry matter 46.2 46.4 45.5
 Crude protein 15.0 14.9 14.5
 RDP, % of Crude protein 64.2 63.3 62.1
 RUP, % of Crude protein 35.8 36.7 37.9
 Ether extracts 3.8 3.6 3.6
 Crude ash 7.7 8.3 7.5
 Neutral detergent fiber 34.6 37.5 34.3
 Acid detergent fiber 19.5 19.9 19.0
 Non-fiber carbohydratec 38.9 35.6 40.1
 NEL, MJ/kg 6.73 6.57 6.69
 Diet priced, $/kg DM 0.388 0.353 0.360
  1. aAH = Total mixed rations containing alfalfa hay. L-NFC = Total mixed rations containing corn stover with low content of non-fiber carbohydrates; H-NFC = Total mixed rations containing corn stover with high content of non-fiber carbohydrates similar to AH
  2. bContained (per kilogram of DM): 250,000 IU of vitamin A, 50,000 IU of vitamin D, 1,100 IU of vitamin E, 600 mg of Fe, 650 mg of Cu, 3,000 mg of Zn, 630 mg of Mn, 17 mg of Se, 36 mg of I, 8 mg of Co, 150-180 g of salt, water ≤100 g
  3. cNon-fiber carbohydrate = 100 – % neutral detergent fiber − % crude protein − % ether extract − % ash; RDP, RUP and NEL were estimated according to CPM dairy 3.0
  4. dDiet price was calculated based on the ingredient purchase prices by the farm