Table 6. Superzyme addition into reduced energy and reduced amino acid diet on growth performance of the broiler chickens

Item Treatment1) SEM p-value2)
PC NC-1 NC-2 NC-1 + 1X NC-2 + 1X NC-1 + 2X NC-2 + 2X Overall Energy AA
Average daily gain (g/d)
 Day 0–21 35.76a 28.66c 23.17e 31.20bc 24.30de 32.90ab 27.52cd 0.736 0.001 0.032 0.002
 Day 22–35 79.78ab 69.17b 72.06ab 73.49ab 75.04ab 84.84a 81.49ab 1.354 0.011 0.001 0.250
 Day 0–35 53.36a 44.86b 42.73b 48.11ab 44.60b 53.67a 49.11ab 0.811 0.001 0.001 0.067
Average daily feed intake (g/d)
 Day 0–21 54.72a 52.04a 45.57b 53.88a 46.19b 55.18a 50.57ab 0.714 0.001 0.296 0.012
 Day 22–35 138.36ab 137.33ab 130.16ab 136.12ab 126.28b 145.02a 141.61ab 1.743 0.055 0.287 0.056
 Day 0–35 88.18ab 86.16abc 79.40bc 86.78abc 78.23c 91.11a 86.98abc 1.019 0.001 0.268 0.027
Feed conversion ratio (g/g)
 Day 0–21 1.56d 1.89abc 2.07a 1.78bc 1.96ab 1.69cd 1.89abc 0.030 0.001 0.005 0.165
 Day 22–35 1.74ab 2.04a 1.8ab 1.88ab 1.71b 1.71b 1.75ab 0.029 0.018 0.001 0.638
 Day 0–35 1.63c 1.95a 1.97a 1.82abc 1.86ab 1.70bc 1.83ab 0.024 0.001 0.001 0.278
PC, nutrient sufficient diet; NC-1, 120 kcal/kg, reduce energy diet; NC-2, 3%, digestible amino acid reduced diet; 1X, 0.025% superzyme-CS addition; 2X, 0.05% superzyme-CS addition.
Overall, p-value for all treatment effect; Energy, p-value for enzyme effect on reduced energy diets; AA, p-value for enzyme effect on reduced amino acid diets.
Means within a same column with no common superscript differ significantly (p < 0.05).
PC, positive control; NC, negative control.