Table 1.
Calculated and analyzed nutrient content of the basal diets.
| Feeding phase |
Starter diets |
Grower diets |
||
|---|---|---|---|---|
| Phytate P | Standard | High | Standard | High |
| Ingredient, % of diet (as-fed basis) | ||||
| Corn | 51.58 | 51.30 | 59.07 | 58.78 |
| Soybean meal, 48% | 27.62 | 25.60 | 20.40 | 18.39 |
| Rice dried distillers grains w/solubles, 47% | 5.00 | 5.00 | 5.00 | 5.00 |
| Polished rice | 12.00 | 12.00 | ||
| De-oiled rice bran | 12.00 | 12.00 | ||
| Soybean oil | 0.52 | 3.31 | 0.99 | 3.78 |
| Salt | 0.42 | 0.43 | 0.37 | 0.37 |
| Limestone | 1.00 | 0.55 | 1.04 | 0.60 |
| Dicalcium phosphate1 | 0.95 | 0.85 | 0.67 | 0.57 |
| Lysine-HCl | 0.20 | 0.23 | 0.14 | 0.18 |
| DL-methionine | 0.19 | 0.20 | 0.12 | 0.13 |
| Threonine | 0.02 | 0.03 | 0.01 | |
| Premix2 | 0.15 | 0.15 | 0.15 | 0.15 |
| Inert (corn/phytase)3 | 0.04 | 0.04 | 0.04 | 0.04 |
| Xylanase4 | 0.01 | 0.01 | 0.01 | 0.01 |
| Chromium | 0.30 | 0.30 | ||
| Nutrient composition, % | ||||
| Crude protein | 21.35 | 21.35 | 18.35 | 18.35 |
| ME, kcal/kg | 2,955.00 | 2,955.00 | 3,060.00 | 3,060.00 |
| Dry matter | 87.49 | 87.70 | 87.69 | 87.90 |
| Calcium | 0.72 | 0.72 | 0.66 | 0.66 |
| Total phosphorus | 0.54 | 0.74 | 0.46 | 0.66 |
| Available phosphorus | 0.25 | 0.25 | 0.20 | 0.20 |
| Phytate phosphorus | 0.24 | 0.45 | 0.23 | 0.44 |
| Total methionine + cysteine | 0.93 | 0.94 | 0.78 | 0.79 |
| Total lysine | 1.25 | 1.26 | 1.00 | 1.01 |
| Digestible methionine + cysteine | 0.83 | 0.83 | 0.69 | 0.69 |
| Digestible lysine | 1.13 | 1.13 | 0.90 | 0.90 |
| Sodium | 0.18 | 0.18 | 0.16 | 0.16 |
Dicalcium phosphate supplied 17% P and 21% Ca.
Supplied per kilogram of diet: iron (ferrous sulfate), 34 mg; manganese (manganese sulfate), 38 mg; zinc (zinc sulfate), 34 mg; copper (basic copper chloride), 6 mg; iodine (calcium iodate), 0.8 mg; selenium (sodium selenite), 113 μ g; vitamin A, 9.4 MIU; vitamin D3 2.1 MIU; vitamin E, 22.5 mg; vitamin B12, 11 μ g; riboflavin, 3.8 mg; niacin, 25 mg; d-pantothenic acid, 11 mg; vitamin K, 1.5 mg; folic acid, 0.8 mg; vitamin B6, 1.9 mg; thiamine, 1.5 mg; and biotin, 60 μ g.
Corn was added in place of phytase in the diets without phytase supplementation. The phytase used was Quantum Blue (AB Vista, Marlborough, UK) with an expected activity of 5,000 phytase units/g.
The xylanase used was Econase XT (AB Vista, Marlborough, UK) with an expected activity of 160,000 xylanase units/g.