Table 5. Effect of a multi-protease in the diet on meat quality analysis of broiler chickens1),2)
| PC | PC-150 | NC | NC-150 | NC-300 | ENC | ENC-150 | ENC-300 | SEM | p-value |
| Crude protein (%) | - | - | −0.5 | −0.5 | −0.5 | −1.0 | −1.0 | −1.0 | | |
| Amino acid3) (%) | - | - | −2.0 | −2.0 | −2.0 | −4.0 | −4.0 | −4.0 | | |
| Day 21 |
| Moisture (%) | 75.37 | 75.48 | 76.16 | 75.71 | 76.01 | 75.53 | 75.55 | 76.01 | 0.141 | 0.833 |
| Crude protein (%) | 20.99 | 21.11 | 20.95 | 20.83 | 20.63 | 20.64 | 20.73 | 20.52 | 0.077 | 0.745 |
| Crude fat (%) | 2.46 | 1.98 | 1.70 | 2.34 | 1.99 | 2.38 | 2.54 | 2.20 | 0.123 | 0.440 |
| Crude ash (%) | 1.19 | 1.43 | 1.19 | 1.11 | 1.37 | 1.45 | 1.18 | 1.27 | 0.043 | 0.271 |
| Day 35 |
| Moisture (%) | 75.71 | 76.08 | 75.73 | 75.91 | 75.07 | 75.07 | 75.83 | 75.26 | 0.143 | 0.577 |
| Crude protein (%) | 21.17 | 20.98 | 21.00 | 20.64 | 21.08 | 20.78 | 20.94 | 21.32 | 0.097 | 0.887 |
| Crude fat (%) | 1.96 | 1.76 | 2.21 | 2.20 | 2.46 | 2.74 | 1.73 | 2.09 | 0.093 | 0.139 |
| Crude ash (%) | 1.16 | 1.18 | 1.07 | 1.25 | 1.40 | 1.41 | 1.50 | 1.33 | 0.057 | 0.112 |
The eight dietary treatments were: positive control (PC), negative control (NC: minus 0.5% from PC, and minus 2% of lysine, methionine, threonine and methionine plus cysteine), extreme negative control (ENC: minus 1% from PC, minus 4% of lysine, methionine, threonine and methionine plus cysteine), and plus multi-protease 150 or 300 g per ton (e. g., PC-150); PC, PC-150, NC, NC-150, NC-300, ENC, ENC-150, ENC-300.
Values are the mean of eight replicates per treatment.
List of amino acids: lysine, methionine, threonine and methionine + cystine.