Table 2.
Final (i.e., 168 h of aerobic incubation) chemical and microbial analyses of the two silages, not treated or treated with a biological additive.
| Control | Treated | |||||||
|---|---|---|---|---|---|---|---|---|
| 23 ℃ | 33 ℃ | SEM | P | 23 ℃ | 33 ℃ | SEM | P | |
| Dry matter (g/kg WW) | 405 | 411 | 2.9 | NS | 359 | 358 | 2.3 | NS |
| pH | 7.0 | 7.2 | 0.098 | NS | 6.88 | 6.84 | 0.200 | NS |
| Lactic acid (g/kg DM) | 6.21 | 4.13 | 0.149 | ** | 8.47 | 4.87 | 0.171 | ** |
| Relative loss of lactic acid (%) | 87.9 | 92.0 | 0.41 | ** | 85.3 | 91.6 | 0.31 | ** |
| Acetic acid (g/kg DM) | 5.24 | 3.27 | 0.154 | ** | 6.06 | 5.69 | 0.129 | NS |
| Butyric acid (g/kg DM) | < 0.38 | < 0.38 | – | – | < 0.38 | < 0.38 | – | – |
| Water soluble carbohydrate (g/kg DM) | 6.95 | 5.87 | 0.189 | * | 7.66 | 6.26 | 0.296 | * |
| Ethanol (g/kg DM) | 3.89 | 2.89 | 0.156 | * | 2.56 | 2.76 | 0.113 | NS |
| Yeasts (log10 cfu/g WW) | 5.83 | 7.79 | 0.290 | ** | 6.52 | 5.52 | 0.360 | NS |
| Molds (log10 cfu/g WW) | < 2 | < 2 | – | – | < 2 | < 2 | – | – |
| Lactic acid bacteria (log10 cfu/g WW) | 7.14 | 7.33 | 0.448 | NS | 8.28 | 8.64 | 0.212 | NS |
| Total bacteria count (log10 cfu/g WW) | 7.74 | 7.42 | 0.449 | NS | 8.31 | 8.51 | 0.264 | NS |
WW, wet weight; DM, dry matter; cfu, colony-forming units.
*, P < 0.05; **, P < 0.01; NS, P > 0.05.