Table 1. Composition (inclusion %) of the diets used during the experimental perioda.
Growing Ib | Growing IIc | Finishing Id | Finishing IIe | |||||
---|---|---|---|---|---|---|---|---|
PC | NC | PC | NC | PC | NC | PC | NC | |
Ingredient | ||||||||
Corn kernels | 68.54 | 69.65 | 72.46 | 73.45 | 77.09 | 77.77 | 81.76 | 82.42 |
Soybean meal | 28.10 | 27.90 | 24.72 | 24.54 | 20.39 | 20.27 | 15.90 | 15.79 |
Dicalcium phosphate | 1.14 | 0.44 | 0.93 | 0.22 | 0.86 | 0.16 | 0.79 | 0.09 |
Limestone | 0.70 | 0.86 | 0.64 | 0.80 | 0.60 | 0.76 | 0.56 | 0.73 |
Soybean oil | 0.58 | 0.21 | 0.27 | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 |
Lysine | 0.12 | 0.12 | 0.15 | 0.15 | 0.21 | 0.21 | 0.24 | 0.24 |
Methionine | 0.03 | 0.03 | 0.02 | 0.02 | 0.03 | 0.03 | 0.02 | 0.02 |
Threonine | 0.02 | 0.02 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 |
Tryptophan | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.02 |
Vitamin premixf | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.08 | 0.08 |
Mineral premixg | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 |
Salt | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | 0.30 | 0.30 |
Adsorbent | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 |
Inert (kaolin) | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 |
Calculated composition | ||||||||
Metabolizable energy (kcal/kg) | 3,230 | 3,230 | 3,230 | 3,230 | 3,230 | 3,230 | 3,230 | 3,230 |
Crude protein | 18.25 | 18.25 | 17.07 | 17.07 | 15.53 | 15.53 | 13.92 | 13.92 |
Ca | 0.64 | 0.53 | 0.55 | 0.44 | 0.51 | 0.40 | 0.47 | 0.36 |
P, total | 0.52 | 0.40 | 0.47 | 0.35 | 0.45 | 0.32 | 0.43 | 0.30 |
P, available | 0.31 | 0.18 | 0.27 | 0.14 | 0.25 | 0.12 | 0.23 | 0.10 |
Ca:P, available | 2.06 | 2.94 | 2.04 | 3.14 | 2.04 | 3.33 | 2.04 | 3.60 |
Digestible lysine | 0.94 | 0.94 | 0.89 | 0.89 | 0.83 | 0.83 | 0.75 | 0.75 |
Digestible methionine | 0.28 | 0.28 | 0.27 | 0.27 | 0.26 | 0.26 | 0.23 | 0.23 |
Digestible methionine + cysteine | 0.54 | 0.54 | 0.51 | 0.51 | 0.48 | 0.48 | 0.44 | 0.44 |
Digestible threonine | 0.64 | 0.64 | 0.61 | 0.61 | 0.56 | 0.56 | 0.50 | 0.50 |
Digestible tryptophan | 0.20 | 0.20 | 0.18 | 0.18 | 0.16 | 0.16 | 0.15 | 0.15 |
Sodium | 0.18 | 0.18 | 0.18 | 0.18 | 0.18 | 0.18 | 0.18 | 0.18 |
PC = positive control. NC = negative control.
aPhytase was added to the negative control diets at 1,000, 2,000, and 3,000 phytase units (FYT) per kg of feed in the four evaluation periods.
b68 to 91 days of age.
c92 to 112 days of age.
d113 to 140 days of age.
e141 to 156 days of age.
fVitamin premix provided per kg of diet: 6,000 IU vitamin A; 1,500 IU vitamin D3; 15 mg vitamin E; 1.5 mg vitamin K3; 1.35 mg vitamin B1; 4 mg vitamin B2; 2 mg vitamin B6; 20 μg vitamin B12; 20 mg; 9.35 mg pantothenic acid; 600 μg folic acid; 80 μg biotin; 300 μg Se.
gMineral premix provided per kg of diet: 100 mg Fe; 10 mg Cu; 40 g Mn; 1 mg Co; 100 mg Zn; 1.5 mg I.