Table 1.
Composition of basal diets (as-fed basis).
| Item | Treatment 1 | |
|---|---|---|
| NC | PC | |
| Ingredients, % | ||
| Corn, yellow dent | 53.91 | 55.05 |
| Soybean meal, 48% CP | 34.00 | 34.00 |
| Corn DDGS 2 | 4.00 | 4.00 |
| Poultry meal | 2.00 | 2.00 |
| Dicalcium phosphate | 2.00 | 1.02 |
| Poultry fat | 1.40 | 1.00 |
| Limestone, ground | 0.77 | 1.03 |
| Titanium dioxide | 0.40 | 0.40 |
| DL-Met | 0.32 | 0.31 |
| Salt | 0.30 | 0.30 |
| L-Lys HCl | 0.24 | 0.24 |
| Choline, 60% | 0.20 | 0.20 |
| Mineral premix 3 | 0.15 | 0.15 |
| Selenium premix | 0.10 | 0.10 |
| L-Thr | 0.08 | 0.07 |
| Phytase premix 4 | 0.08 | 0.08 |
| Vitamin premix 5 | 0.05 | 0.05 |
| Calculated composition | ||
| ME 6, kcal/kg | 3000 | 3000 |
| CP 7, % | 23.00 | 23.00 |
| Digestible Lys, % | 1.28 | 1.28 |
| Digestible Met + Cys, % | 0.95 | 0.95 |
| Ca 8, % | 0.96 | 0.81 |
| p 9 available, % | 0.48 | 0.33 |
| p total, % | 0.82 | 0.65 |
| Analyzed composition | ||
| DM 10, % | 88.4 ± 0.4 | 88.4 ± 0.4 |
| CP, % | 23.2 ± 0.3 | 23.3 ± 0.4 |
| Ca, % | 1.08 ± 0.02 | 0.90 ± 0.10 |
| Phytate 11, % | 0.32 ± 0.01 | 0.37 ± 0.02 |
| Total p, % | 0.86 ± 0.02 | 0.67 ± 0.01 |
1 NC: no phytase, diet meeting nutrient requirements by Ross Nutrient Specification (2019); PC: no phytase, diet with Ca 0.15% and P with 0.15% lower than Ross Nutrient Specification (2019) requirements; 2 DDGS: corn distillers dried grains with soluble; 3 The trace mineral premix provided per kilogram of complete diet: 33 mg of Mn as manganous oxide, 110 mg of Fe as ferrous sulfate, 110 mg of Zn as zinc sulfate, 16.5 mg of Cu as copper sulfate, 0.30 mg of I as ethylenediamine dihydroiodide, and 0.30 mg of Se, as sodium selenite; 4 Phytase enzyme mixed with corn; 5 The vitamin premix provided per kilogram of complete diet: 6614 IU of vitamin A as vitamin A acetate, 992 IU of vitamin D3, 19.8 IU of vitamin E, 2.64 mg of vitamin K as menadione sodium bisulfate, 0.03 mg of vitamin B12, 4.63 mg of riboflavin, 18.52 mg of D-pantothenic acid as calcium panthonate, 24.96 mg of niacin, and 0.07 mg of biotin; 6 Metabolizable energy; 7 Crude protein; 8 Calcium; 9 Phosphorus; 10 Dry matter; 11 Phytate analysis was performed using the Megazyme kit K-PHYT 05/19 (Megazyme, Bray Business Park, Bray, Co. Wicklow, A98 YV29, Ireland).