Table 1.
Estimating the energy value of feed and feed ingredients from chemical composition and digestibility values.
| Ingredient | Prediction equation | Reference |
|---|---|---|
| Corn | MEn = 36.21 (CP) + 85.44 (EE) + 37.26 (NFE) | Janssen (1989)1 |
| Sorghum | MEn = 31.02 (CP) + 77.03 (EE) + 37.67 (NFE) | |
| Wheat | MEn = 34.92 (CP) + 63.10 (EE) + 36.42 (NFE) | |
| Soybean meal | MEn = 36.63 (CP) + 77.96 (EE) + 19.87 (NFE) | |
| Distillers dried grains with solubles | TMEn = 2,732.7 + 36.4 (fat) - 76.3 (fiber) + 14.5 (protein) - 26.2 (ash) | Batal and Dale (2006)2 |
| Distillers dried grains with solubles | AMEn = 3,517 + 46.02 (EE) - 82.7 (ash) - 33.27 × (HC) | Rochell et al. (2011)3 |
| AMEn = −30.19 (NDF) + 0.81 (GE) - 12.26 (CP) | ||
| Distillers dried grains with solubles | AMEn = −12,282 + 2.60 (GE) + 89.75 (CP) + 125.80 (starch) - 40.67 (TDF) | Meloche et al. (2013)3 |
| AMEn = −14,322 + 2.69 (GE) + 117.8 (CP) + 149.41 (starch) - 18.30 (NDF) | ||
| Corn | AMEn = 4,021.8 - 227.55 (ash) | Alvarenga et al. (2013a)4 |
| AMEn = 36.21 (CP) + 85.44 (EE) + 37.26 (NFE) | ||
| Soybean meal | AMEn = −822.33 + 69.54 (CP) - 45.26 (ADF) + 90.81 (EE) | |
| AMEn = 37.5 (CP) + 46.39 (EE) + 14.9 (NFE) | ||
| Corn and soybean meal | AMEn = 4,164.187 + 51.006 (EE) - 197.663 (ash) - 35.689 (CF) - 20.593 (NDF) | |
| General | AMEn = 4,164.187 + 51.006 (EE) - 197.663 (ash) - 35.689 (CF) - 20.593 (NDF) | Alvarenga et al. (2015)4 |
| General | ME = [18.03 (CPdigestible) + 38.83 (fatdigestible) + 17.32 × (NFEdigestible)]/1,000 | CVB (2016)5 |
| Barley | ME = [9,258 - 9.258 (ash) + 7.709 (starch)]/1,000 | |
| Oats | ME = [12,980 -12.98 (ash) + 48.82 (fat) - 25.50 (CF)]/1,000 | |
| Wheat products (excluding wheat) | ME = [16,780 - 16.78 (ash) - 69.20 (CF)]/1,000 | |
| Meat meal and meat and bone meal | ME = [14,200 - 19.15 (ash) + 25.1 (fat)]/1,000 | |
| Soybean meal | ME = [7,690 - 7.69 (ash) + 6.464 (CP) + 29.43 (fat) - 16.09 (CF)]/1,000 | |
| Vegetable feed ingredients | ME = 4.31 (CPdigestible) + 9.29 (EEdigestible) + 4.14 (NFEdigestible) | Rostagno et al. (2017)6 |
| Animal feed ingredients and fats | ME = 4.31 (CPdigestible) + 9.29 (EEdigestible) |
CF = crude fiber; CP = crude protein; EE = ether extract; GE = gross energy; HC = hemicellulose; ME = metabolizable energy; MEn = metabolizable energy corrected for nitrogen; NFE = nitrogen-free extract; NDF = neutral detergent fiber; TDF = total dietary fiber.
1
MEn unit, kcal/kg DM; component unit, % (DM basis).
2
TMEn unit, kcal/kg as-fed; component unit, % (as-fed basis).
3
AMEn and GE unit, kcal/kg DM; component unit, % (DM basis).
4
AMEn unit, kcal/kg DM; component unit, % (DM basis).
5
ME unit, MJ/kg DM; digestible and total content unit, g/kg (DM basis).
6
ME unit, kcal/kg DM; digestible CP, EE and NFE unit, g/kg (DM basis).