Table 1.
Ingredients and chemical composition of diets containing increasing amounts of crude glycerin (% DM basis)
| Item | Dietary crude glycerin (% of dietary DM) | |||
|---|---|---|---|---|
|
| ||||
| 0 | 7 | 14 | 21 | |
| Ingredients composition (%) | ||||
| Crude glycerin1 | 0.0 | 7.0 | 14.0 | 21.0 |
| Ground corn | 40.0 | 33.0 | 26.0 | 19.0 |
| Cassava chip | 26.6 | 22.6 | 18.5 | 14.4 |
| Palm kernel cake | 12.4 | 16.4 | 20.5 | 24.6 |
| Leucaena leave meal | 10.0 | 10.0 | 10.0 | 10.0 |
| Napier hay | 1.0 | 1.0 | 1.0 | 1.0 |
| Molasses | 5.0 | 5.0 | 5.0 | 5.0 |
| Salt | 0.2 | 0.2 | 0.2 | 0.2 |
| Urea | 2.0 | 2.0 | 2.0 | 2.0 |
| Mineral and vitamin mix2 | 1.0 | 1.0 | 1.0 | 1.0 |
| Dicalcium phosphate | 1.0 | 1.0 | 1.0 | 1.0 |
| Sodium bicarbonate (NaHCO3( | 0.5 | 0.5 | 0.5 | 0.5 |
| Analyzed nutrient content3 (% DM) | ||||
| DM | 87.91 | 86.25 | 84.47 | 83.39 |
| Ash | 4.59 | 4.71 | 4.86 | 5.20 |
| OM | 95.41 | 95.29 | 95.14 | 94.48 |
| CP | 13.95 | 13.98 | 13.95 | 13.92 |
| EE | 2.64 | 2.49 | 2.34 | 2.22 |
| NDF | 44.07 | 42.33 | 38.24 | 39.08 |
| ADF | 19.44 | 19.97 | 20.00 | 19.07 |
| ME4 (Mcal/kg DM) | 2.59 | 2.58 | 2.58 | 2.57 |
DM, dry matter; OM, organic matter; CP, crude protein; EE, ether extract; NDF, neutral detergent fiber; ADF, acid detergent fiber; ME, metabolizable energy, TDN, total digestible nutrient.
Contained 88.91% glycerol, 5.60% water, 2.24% sodium, and 0.52% methanol (Colorless, odorless, viscous liquid obtained from Biodiesel Producers, New Biodiesel, Surat Thani Province, Thailand).
Minerals and vitamins (each kg contains): Vitamin A, 10,000,000 IU; Vitamin E, 70,000 IU; Vitamin D, 1,600,000 IU; Fe, 50 g; Zn, 40 g; Mn, 40 g; Co, 0.1 g; Cu, 10 g; Se, 0.1 g; I, 0.5 g.
Based on analysis of composite feed sample.
ME = TDN×0.04409×0.82 (NRC, 2000). Calculated with an estimated ME for glycerol of 3.47 Mcal/kg of DM (Mach et al., 2009).