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. 2020 May 8;14(9):1829–1840. doi: 10.1017/S1751731120000889

Table 1.

In vitro fermentation characteristics and feeding value of single feeds

Single feed In vitro gas production dOM ME uCP IDRUP CP fractions EDCNCPS
bGP (ml/200 mg DM) cGP (%/h) GP24 (ml/200 mg DM) (%) (MJ/kg DM) k = 5%/h (g/kg DM) k = 8%/h (g/kg DM) (%) A (%) B1 (%) B2 (%) B3 (%) C (%) k = 5%/h (%) k = 8%/h (%)
Maize 92 5.7 81 96 14.5 163 158 83 12.5 5.9 66.6 14.9 0.0 65 55
Wheat 70 8.3 78 96 14.2 180 198 35 9.8 22.2 63.5 4.4 0.0 80 73
Barley 81 7.7 75 92 13.6 162 175 47 11.4 16.4 62.3 5.0 5.0 76 69
Soya beans 47 10.8 46 79 16.0 227 282 71 4.5 4.8 82.7 6.4 1.6 56 45
Soya bean meal 56 8.0 51 92 13.3 279 356 83 2.9 8.4 83.8 3.6 1.2 72 62
Rapeseed meal 50 8.5 45 78 11.3 241 280 26 7.1 13.4 62.5 10.2 6.8 73 65
Sunflower meal 39 8.9 36 65 9.4 166 205 46 8.3 27.3 54.6 5.9 3.9 76 69
Faba beans 70 8.3 63 90 12.9 202 224 32 12.7 42.3 38.7 4.2 2.1 80 75
DDGS 51 8.7 44 73 11.9 275 296 75 20.6 0.0 44.1 11.8 23.6 55 50
Maize gluten 62 6.8 54 78 11.0 188 196 59 48.5 6.2 33.8 8.6 2.9 79 75
Wheat bran 57 9.9 52 72 10.9 144 158 18 12.5 21.1 49.4 13.6 3.4 80 74
Sugar beet pulp 78 9.4 74 90 13.2 182 199 67 39.9 0.0 29.2 24.8 6.2 82 78

bGP = potential gas production; cGP = rate of gas production; GP24 = corrected gas production at 24 h; dOM = digestibility of organic matter; ME = metabolisable energy; uCP = utilisable CP for ruminal passage rates (k) of 5 and 8%/h; IDRUP = intestinal digestibility of rumen-undegraded protein; CP fractions = crude protein fractions: A = non-protein nitrogen; B1 = rapidly degradable true protein; B2 = moderately degradable true protein; B3 = slowly degradable true protein, C = undegradable and indigestible true protein, determined using Cornell Net Carbohydrate and Protein System (CNCPS); EDCNCPS = effective protein degradation for ruminal passage rates of 5 and 8%/h, calculated using Fox et al. (2003); DDGS = dried distillers’ grains with solubles.