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Table 1 Feed ingredients, chemical composition and gross energy content of seven diets

From: Influence of main dietary chemical constituents on the in vitro gas and methane production in diets for dairy cows

  Reference Low NDF High NDF Low CP High CP Low Lipid High Lipid
Ingredients, g/kg DM
 Corn silage 351 430 375 281 351 351
 Alfalfa hay 89 23 134 66 156 89 89
 Ryegrass hay 47 231 43 52 47 56
 Meadow hay 47 227 47 52 47 60
 Corn grain 205 228 152 258 147 218 160
 Barley grain 119 171 92 160 90 122 100
 Soybean meal, (sol. extr., 44) 113 119 126 27 188 126 18
 Whole soybean seeds, cracked 68
 Extruded soybean seeds 68
 Extruded flaxseed seeds 29 29 38 24 34 29
Chemical composition, g/kg DM
 Crude protein (CP) 158 152 161 115 194 161 158
 Starch 273 273 100 332 176 265 233
 NDF 361 325 435 358 357 359 360
 Hemicellulose 169 171 189 172 158 171 169
 ADF 192 154 246 186 199 188 191
 Cellulose 163 134 203 160 167 163 163
 Lignin(sa) 29 20 43 26 32 25 28
 NFCa 395 443 302 446 357 402 367
 Ether extract 33 34 38 34 34 26 61
 Ash 53 46 64 47 58 52 54
Gross energy, MJ/kg DMb 16.8 16.9 17.3 16.8 17.3 16.5 16.7
  1. a NFC Not Fiber Carbohydrates computed as 100 - NDF - CP - EE - Ash
  2. bMeasured by a bomb calorimeter method [16]