Table 8.
Fecal pH and concentration of end-fermentation products (ammonia, mg/g; spermidine µmol/L; valerate and iso-caproate, µmol/g) as affected (P < 0.05) by the interaction between selenium source (inorganic, SeInorg; organic, SeOrg) and age (20–52 weeks).
| SeInorg | SeOrg | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 28 | 36 | 44 | 52 | 20 | 28 | 36 | 44 | 52 | SEM | P value | |
| pH | 6.4b,c | 6.2c | 6.3c | 6.4b,c | 6.8a | 6.2c | 6.4b,c | 6.3c | 6.7a | 6.6a,b | 0.13 | 0.042 |
| Ammonia-N | 1.00c | 1.19b,c | 1.63a | 1.16b,c | 0.83c | 1.16b,c | 1.06c | 1.66a | 1.39a,b | 1.03c | 0.144 | 0.047 |
| Spermidine | 500a | 451a | 402a,b | 475a | 318b | 428a,b | 383a,b | 332b | 345a,b | 441a | 40.7 | 0.001 |
| Valerate | 2.53a,b | 0.87c | 0.78c | 1.12c | 2.24b | 1.50b,c | 0.73c | 0.84c | 2.56a,b | 3.31a | 0.323 | <0.001 |
| Iso-caproate | 0.74a,b,c | 0.78a,b,c | 0.66c | 0.69b,c | 1.22a,b | 0.48c | 0.47c | 0.67c | 1.36a | 1.22a,b | 0.199 | 0.004 |
SEM: standard error of the mean.
a–d
Values in the same row that share a common superscript are not statistically different (P > 0.05).