Table 5.
Effects of experimental diets on urine and feces characteristics (mean ± standard deviation, n = 4).
| Items | CON | RCP | AD | CD | p-Value | |
|---|---|---|---|---|---|---|
| Protein | Acidifying | |||||
| Total N in feces (g/kg) | 9.23 ± 1.10 | 8.84 ± 0.98 | 9.55 ± 0.77 | 8.21 ± 1.06 | 0.01 | 0.61 |
| NH4-N in feces (g/kg) | 1.02 ± 0.18 | 0.95 ± 0.19 | 0.96 ± 0.05 | 0.99 ± 0.09 | 0.79 | 0.90 |
| K in feces (g/kg) | 3.34 ± 0.28 | 3.10 ± 0.18 | 3.12 ± 0.29 | 2.98 ± 0.09 | 0.11 | 0.15 |
| pH fresh urine at the spot | 7.08 ± 0.18 | 7.38 ± 0.43 | 6.26 ± 0.68 | 6.37 ± 0.76 | 0.28 | 0.001 |
| Urinary NH4-N in jar without acid (g/kg) | 7.89 ± 2.30 | 5.82 ± 4.83 | 6.60 ± 1.99 | 6.39 ± 2.37 | 0.38 | 0.77 |
| Urinary total N in jar without acid (g/kg) | 8.86 ± 2.59 | 6.92 ± 5.80 | 8.17 ± 1.94 | 8.14 ± 2.52 | 0.48 | 0.85 |
| Urinary K in jar without acid (g/kg) | 5.29 ± 2.07 | 5.24 ± 2.48 | 5.21 ± 0.47 | 5.87 ± 1.66 | 0.66 | 0.68 |
| Urinary NH4-N in jar with acid (mg/kg) | 849 ± 574 | 519 ± 320.68 | 648 ± 164 | 977 ± 364 | 0.09 | 0.63 |
| pH of urine patches in jar with water at the spot | 8.59 ± 0.50 | 8.25 ± 0.50 | 8.01 ± 0.01 | 8.14 ± 0.28 | 0.59 | 0.10 |
| pH of urine soiled | 8.46 ± 0.13 | 7.89 ±0.22 | 7.83± 0.44 | 7.76 ± 0.55 | 0.12 | 0.07 |
| NH4-N of urine patches in jar with water (mg/kg) | 3483 ± 3447 | 7338 ± 1121 | 3451 ± 1753 | 2879 ± 1964 | 0.51 | 0.40 |
| K of urine patches in jar with water (mg/kg) | 1152 ± 526 | 672 ± 347 | 697 ± 480 | 1209 ± 705 | 0.94 | 0.85 |
| NH4-N of urine patches in jar with acid (mg/kg) | 2737 ± 1538 | 1391 ± 1677 | 1940 ± 1182 | 1800 ± 1215 | 0.09 | 0.63 |
| pH of upper manure in jar with water at the spot | 7.90 ± 0.21 | 7.90 ± 0.20 | 8.00 ± 0.01 | 8.03 ± 0.05 | 0.12 | 0.77 |
| NH4-N of upper manure in jar with water (mg/kg) | 4151 ± 1235 | 2891 ± 1135 | 2548 ± 1328 | 3562 ± 1096 | 0.58 | 0.06 |
CON = control diet, RCP = reduced crude protein diet, AD = acidifying diet, CD = combined diet.