Table 5.
Effects of supplementing exogenous enzymes in pig diets at weaning productive stage on animal performance.
| Variable | Phytase | Xylanase | Protease | Combinationof exogenous enzymes | Control | |
|---|---|---|---|---|---|---|
| Studies | n | 14 | 9 | 4 | 23 | 31 |
| Number of animals | Mean ± SD | 55.86 ± 94.81 | 31.44 ± 35.76 | 51.25 ± 17.50 | 28.13 ± 21.64 | 47.03 ± 67.23 |
| Min – Max | 8 – 279 | 8 – 115 | 25 – 60 | 6 – 115 | 6 – 279 | |
| CV (%) | 169.74 | 113.72 | 34.15 | 76.94 | 142.94 | |
| Dosage of Enzyme in the diet, (g/kg) | Mean ± SD | 2.50 ± 5.45 | 0.054 ± 0.022 | 0.09 ± 0.05 | 0.80 ± 0.75 | |
| Min – Max | 0.07 – 15.68 | 0.018 – 0.076 | 0.03 – 0.14 | 0.06 – 2.85 | ||
| CV (%) | 217.68 | 41.25 | 53.89 | 93.55 | ||
| Dosage of Enzyme in the diet, (g/d) | Mean ± SD | 3.28 ± 7.09 | 0.06 ± 0.024 | 0.02 ± 0.08 | 1.06 ± 0.98 | |
| Min – Max | 0.10 – 20.0 | 0.03 – 0.10 | 0.10 – 0.30 | 0.1 – 4.00 | ||
| CV (%) | 216.31 | 39.97 | 40.83 | 95.12 | ||
| Dosage of Enzyme in the diet, (g/kg LW0.75) | Mean ± SD | 0.46 ± 1.00 | 0.01 ± 0.005 | 0.02 ± 0.01 | 0.20 ± 0.19 | |
| Min – Max | 0.014 – 2.89 | 0.004 – 0.017 | 0.008 – 0.033 | 0.01 – 0.58 | ||
| CV (%) | 217.81 | 41.81 | 50.37 | 94.02 | ||
| Initial body weight, (kg) | Mean ± SD | 9.04 ± 1.63 | 7.73 ± 0.48 | 6.47 ± 0.40 | 7.16 ± 1.65 | 7.72 ± 1.65 |
| Min – Max | 6.41 – 11.90 | 6.47 – 7.98 | 6.27 – 7.06 | 5.36 – 9.94 | 5.36 – 11.90 | |
| CV (%) | 18.00 | 6.25 | 6.11 | 22.98 | 21.39 | |
| Animal performance | ||||||
| Average Daily Feed intake, (kg/d) | Mean ± SD | 0.72 ± 0.14 | 0.96 ± 0.45 | 0.43 ± 0.19 | 0.82 ± 0.35 | 0.69 ± 0.29 |
| Min – Max | 0.45 – 0.95 | 1.52 – 47.07 | 0.71 – 42.94 | 0.41 – 1.35 | 0.31 – 1.46 | |
| CV (%) | 18.78 | 47.07 | 42.94 | 42.42 | 41.75 | |
| Average Daily Gain, (kg/d) | Mean ± SD | 0.48 ± 0.08 | 0.55 ± 0.19 | 0.30 ± 0.02 | 0.45 ± 0.14 | 0.41 ± 0.15 |
| Min – Max | 0.30 – 0.54 | 0.29 – 0.79 | 0.28 – 0.32 | 0.23 – 0.60 | 0.22 – 0.78 | |
| CV (%) | 16.55 | 34.71 | 6.62 | 30.19 | 37.67 | |
| Gain: Feed, (kg/kg) | Mean ± SD | 0.67 ± 0.66 | 1.17 ± 0.54 | 0.62 ± 0.06 | 0.65 ± 0.29 | |
| Min – Max | 0.53 – 0.75 | 0.76 – 1.78 | 0.49 – 0.76 | 0.30 – 1.90 | ||
| CV (%) | 9.83 | 46.43 | 10.02 | 43.85 | ||
| Digestibility of Dry Matter, (g/kg) | Mean ± SD | 840.6 ± 25.5 | 829.5 ± 7.14 | 882.7 ± 12.20 | 716.6 ± 133.9 | 728.1 ± 238.1 |
| Min – Max | 810 – 869 | 821.8 – 835.9 | 869.2 – 892.9 | 510.0 – 874.4 | 0 – 896.7 | |
| CV (%) | 3.39 | 0.86 | 1.38 | 18.68 | 31.74 |
SD: Standard deviation; Minimum: Min; Maximum: Max; CV: Coefficient of variation.