Table 1.
Composition of phase 1, phase 2, and phase 3 diets (as-fed basis)1
| Item | Phase 1 | Phase 2 | Phase 3 |
|---|---|---|---|
| Ingredients, % | |||
| Corn | 43.98 | 57.10 | 64.70 |
| Soybean meal, 46.5% CP | 18.10 | 26.35 | 31.30 |
| Whey powder | 25.00 | 10.00 | – |
| Fish meal | 4.50 | – | – |
| Enzymatically-treated soybean meal2 | 3.75 | 2.00 | – |
| Soybean oil | 1.50 | – | – |
| Calcium carbonate | 0.30 | 0.90 | 0.85 |
| Monocalcium phosphate, 21% P | 0.48 | 1.10 | 1.00 |
| Sodium chloride | 0.30 | 0.55 | 0.60 |
| L-Lys-HCl | 0.43 | 0.51 | 0.52 |
| DL-Met | 0.22 | 0.22 | – |
| MHA3 | – | – | 0.25 |
| L-Thr | 0.18 | 0.21 | 0.22 |
| L-Trp | 0.07 | 0.06 | 0.06 |
| L-Val | 0.13 | 0.14 | 0.13 |
| Vitamin premix4 | 0.25 | 0.25 | – |
| Vitamin premix with phytase5 | – | – | 0.25 |
| Trace mineral premix6 | 0.15 | 0.15 | 0.15 |
| Phytase7 | 0.08 | 0.08 | – |
| Zinc oxide8 | ± | ± | – |
| Yeast additives9 | ± | ± | --- |
| Total | 100 | 100 | 100 |
| Calculated analysis | |||
| SID amino acids, % | |||
| Lys | 1.40 | 1.35 | 1.35 |
| Ile:Lys | 56 | 55 | 55 |
| Leu:Lys | 109 | 111 | 114 |
| Met:Lys | 38 | 36 | 36 |
| Met and Cys:Lys | 57 | 57 | 57 |
| Thr:Lys | 63 | 63 | 63 |
| Trp:Lys | 20.6 | 20.2 | 20.3 |
| Val:Lys | 69 | 69 | 69 |
| His:Lys | 32 | 34 | 36 |
| Total Lys, % | 1.53 | 1.48 | 1.49 |
| ME, kcal/kg | 3,408 | 3,267 | 3,271 |
| NE, kcal/kg | 2,565 | 2,429 | 2,416 |
| SID Lys:NE, g/Mcal | 5.44 | 5.54 | 5.57 |
| CP, % | 20.9 | 20.5 | 21.2 |
| Ca, % | 0.69 | 0.77 | 0.72 |
| P, % | 0.68 | 0.66 | 0.61 |
| STTD P, % | 0.63 | 0.58 | 0.50 |
| Zn, mg/kg | 110 vs 3,000 | 110 vs 2,000 | 110 |
1Phase 1 diets were fed from days 0 to 7 (approximately 5.6 to 6.1 kg) and phase 2 diets were fed from days 7 to 21 (approximately 6.1 to 11.6 kg). Both phases were manufactured at the Kansas State University Poultry Unit (Manhattan, KS). A common diet, withoutZnO or yeast probiotics, was fed during phase 3 from days 21 to 42 (approximately 11.6 to 24.0 kg). The common diet was manufactured by Hubbard Feeds (Beloit, KS).
2HP 300, Hamlet Protein, Findlay, OH.
3 Methionine hydroxy analogue, Novus International, St. Charles, MO.
4Provided per kg of premix: 1,653,465 IU vitamin A; 661,386 IU vitamin D; 17,637 IU vitamin E; 1,322 mg vitamin K; 13.2 mg vitamin B12; 19,841 mg niacin; 11,023 mg pantothenic acid; 3,307 mg riboflavin.
5 Ronozyme HiPhos GT 2700 (DSM Nutritional Products, Parsippany, NJ) provided 1,250 FTU/kg and an expected STTD P release of 0.12%. Provided per kg of premix: 1,653,465 IU vitamin A; 661,386 IU vitamin D; 17,637 IU vitamin E; 1,322 mg vitamin K; 13.2 mg vitamin B12; 19,841 mg niacin; 11,023 mg pantothenic acid; 3,307 mg riboflavin.
6Provided per kg of premix: 73 g Zn from Zn sulfate; 73 g Fe from iron sulfate; 22 g Mn from manganese oxide; 11 g Cu from copper sulfate; 0.2 g I from calcium iodate; 0.2 g Se from sodium selenite.
7Ronozyme HiPhos 2700 (DSM Nutritional Products, Parsippany, NJ) provided 2,027 FTU/kg and an estimated release of 0.14% STTD P in phases 1 and 2.
8 ZnO was fed to supply 3,000 mg/kg of Zn for the duration of phase 1 and 2,000 mg/kg of Zn for the duration of phase 2.
9Yeast pre- and probiotics included 0.10% ActiSaf Sc 47 HR+, 0.05% SafMannan, and 0.05% NucleoSaf in phase 1 diets and then concentrations were lowered by 50% in phase 2 diets (Phileo by Lesaffre, Milwaukee, WI).