Table 7.
pH and ammonia emissions from growing-finishing pig house as affected by experimental diets (mean ± standard deviation, n = 4).
| Items | CON | RCP | AD | CD | p-Value | |
|---|---|---|---|---|---|---|
| Protein | Acidifying | |||||
| pH at 0.5 cm depth from the manure surface | 8.48 ± 0.41 | 7.56 ± 0.13 | 7.79 ± 0.13 | 8.01 ± 0.52 | 0.07 | 0.49 |
| pH at 5 cm depth from the manure surface | 7.79 ± 0.31 | 6.94 ± 0.23 | 7.19 ± 0.08 | 7.11 ± 0.23 | 0.003 | 0.09 |
| Ammonia concentration at 1 cm above ( the manure surface (mg/m3) |
15.66 ± 6.12 | 8.02 ± 2.19 | 9.89 ± 1.82 | 6.50 ± 1.43 | 0.02 | 0.09 |
| Ammonia concentration at 10 cm above (the manure surface (mg/m3) |
9.55 ± 3.31 | 7.23 ± 2.53 | 8.96 ± 3.43 | 5.79 ± 1.83 | 0.02 | 0.42 |
| NH3 emission from the floor (g/day) | 1.91 ± 1.18 | 1.03 ± 0.67 | 1.34 ± 1.19 | 1.35 ± 0.90 | 0.06 | 0.41 |
| NH3 emission from animal house (g/day) | 3.90 ± 1.38 | 2.68 ± 1.01 | 3.03 ± 1.57 | 3.03 ± 0.74 | 0.08 | 0.42 |
CON = control diet, RCP = reduced crude protein diet, AD = acidifying diet, CD = combined diet.