Table 1.
Ingredients and chemical composition of the experimental diets (± SD; n = 4 per diet)
| Control | AFEX1 | |||
|---|---|---|---|---|
| Item | Enz− 2 | Enz+ 3 | Enz− | Enz+ |
| Ingredient, % DM | ||||
| Alfalfa pellets4 | 50.0 | 20.0 | ||
| AFEX straw pellets5 | — | 30.0 | ||
| Barley grain | 35.3 | 35.3 | ||
| Corn Dried distillers’ grain with solubles (DDGS)6 | 5.0 | 5.0 | ||
| Canola meal | 5.0 | 5.0 | ||
| Dried molasses | 1.3 | 1.3 | ||
| Canola oil | 1.0 | 1.0 | ||
| Sheep mineral6 | 1.0 | 1.0 | ||
| Urea | 0.5 | 0.5 | ||
| Ammonium chloride | 0.4 | 0.4 | ||
| Dicalcium phosphate | 0.3 | 0.3 | ||
| Calcium carbonate | 0.250 | 0.250 | ||
| Vitamin ADE | 0.020 | 0.020 | ||
| Bovatec 20 (20% lasalocid) | 0.018 | 0.018 | ||
| Chemical composition | ||||
| DM, % | 95.9 ± 0.71 | 95.9 ± 0.74 | 96.3 ± 0.62 | 96.4 ± 0.55 |
| OM, % of DM | 91.5 ± 0.33 | 91.5 ± 0.63 | 93.2 ± 0.36 | 93.4 ± 0.40 |
| CP, % of DM | 19.6 ± 0.94 | 19.7 ± 0.97 | 16.5 ± 0.16 | 17.0 ± 0.56 |
| NDF, % of DM | 30.6 ± 3.85 | 30.5 ± 2.90 | 38.0 ± 1.45 | 36.9 ± 2.06 |
| ADF, % of DM | 21.8 ± 3.24 | 22.3 ± 3.61 | 27.9 ± 1.64 | 28.5 ± 1.19 |
| NFC, % of DM | 37.7 ± 2.87 | 37.7 ± 2.49 | 35.8 ± 1.15 | 36.6 ± 1.70 |
| Ether extract, % of DM | 3.7 ± 0.28 | 3.7 ± 0.47 | 2.9 ± 0.23 | 3.0 ± 0.16 |
| Ca, % of DM | 1.15 ± 0.069 | 1.14 ± 0.132 | 0.64 ± 0.087 | 0.66 ± 0.061 |
| P, % of DM | 0.41 ± 0.042 | 0.43 ± 0.040 | 0.37 ± 0.029 | 0.37 ± 0.044 |
| NEm, Mcal/kg | 1.61 ± 0.062 | 1.60 ± 0.066 | 1.52± 0.025 | 1.55 ± 0.029 |
| NEg, Mcal/kg | 1.00 ± 0.057 | 1.00 ± 0.055 | 0.93 ± 0.021 | 0.95 ± 0.028 |
1AFEX = ammonia fiber expansion treatment (30% AFEX straw pellets on a dietary DM basis replacing alfalfa hay pellets).
2Enz− = diet without enzyme.
3Enz+ = diet with enzyme.
4Chemical composition of alfalfa hay pellets: 89.0% OM, 17.8% CP, 54.8% NDF, 44.5% ADF, and 2.0% ether extract.
5Chemical composition of AFEX wheat straw pellets: 94.2% OM, 9.7% CP, 69.9% NDF, 54.4% ADF and 0.9% ether extract.
6Sheep mineral constituents (%): salt 92.6, potassium magnesium sulfate 4.979, zinc sulfate 0.921, magnesium sulfate 0.835, organic iodine 0.014, 1% selenium premix 0.143, cobalt carbonate 0.004, canola oil 0.398. Vitamin ADE constituents: vitamin A 10,000,000 IU, vitamin D 1,000,000 IU, vitamin E 10,000 IU/kg.