Table 2.
Phase 2 diet composition, experiment 1 (as-fed basis)1
| Control, 21% CP | CP (%) with CWB | |||||
|---|---|---|---|---|---|---|
| Added ZnO | No added ZnO | 21 | 19.5 | 18 | 16.5 | |
| Ingredient, % | ||||||
| Corn | 55.65 | 55.90 | 52.75 | 56.55 | 60.40 | 64.35 |
| Soybean meal, 46.5% CP | 30.20 | 30.15 | 29.35 | 25.30 | 21.30 | 17.00 |
| Dried whey | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 |
| CWB | — | — | 4.00 | 4.00 | 4.00 | 4.00 |
| Calcium carbonate | 0.93 | 0.93 | 0.98 | 0.98 | 0.98 | 0.98 |
| Monocalcium phosphate, 21% P | 0.90 | 0.90 | 0.80 | 0.85 | 0.90 | 1.00 |
| Salt | 0.55 | 0.55 | 0.55 | 0.55 | 0.58 | 0.58 |
| l-Lysine | 0.47 | 0.47 | 0.48 | 0.58 | 0.61 | 0.68 |
| dl-Methionine | 0.22 | 0.22 | 0.21 | 0.23 | 0.23 | 0.23 |
| l-Threonine | 0.20 | 0.21 | 0.21 | 0.25 | 0.26 | 0.28 |
| l-Tryptophan | 0.06 | 0.06 | 0.06 | 0.08 | 0.08 | 0.10 |
| l-Valine | 0.13 | 0.13 | 0.13 | 0.18 | 0.20 | 0.23 |
| l-Isoleucine | — | — | — | — | 0.03 | 0.08 |
| Trace mineral premix2 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 |
| Vitamin premix3 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
| Phytase4 | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 |
| Zinc oxide | 0.27 | — | — | — | — | — |
| Total | 100 | 100 | 100 | 100 | 100 | 100 |
| Calculated analysis | ||||||
| Standardized digestible (SID) amino acids, % | ||||||
| Lysine | 1.35 | 1.35 | 1.35 | 1.33 | 1.25 | 1.20 |
| Isoleucine:lysine | 57 | 57 | 56 | 52 | 52 | 52 |
| Leucine:lysine | 114 | 114 | 112 | 106 | 105 | 101 |
| Methionine:lysine | 37 | 37 | 36 | 37 | 37 | 37 |
| Methionine and cysteine:lysine | 58 | 58 | 58 | 58 | 58 | 58 |
| Threonine:lysine | 64 | 64 | 64 | 64 | 64 | 64 |
| Tryptophan:lysine | 21.2 | 21.2 | 21.3 | 21.1 | 21.0 | 21.1 |
| Valine:lysine | 70 | 70 | 70 | 70 | 70 | 70 |
| Total lysine, % | 1.49 | 1.49 | 1.49 | 1.45 | 1.37 | 1.31 |
| Metabolizable energy, kcal/kg | 3,267 | 3,276 | 3,236 | 3,243 | 3,245 | 3,249 |
| Net energy, kcal/kg | 2,420 | 2,429 | 2,394 | 2,418 | 2,440 | 2,464 |
| SID lysine:net energy, g/Mcal | 5.57 | 5.55 | 5.63 | 5.47 | 5.11 | 4.86 |
| CP, % | 21.0 | 21.0 | 21.0 | 19.5 | 18.0 | 16.5 |
| Calcium, % | 0.75 | 0.75 | 0.76 | 0.75 | 0.75 | 0.75 |
| Phosphorus, % | 0.62 | 0.62 | 0.63 | 0.62 | 0.61 | 0.61 |
| Available phosphorus, % | 0.47 | 0.47 | 0.46 | 0.46 | 0.47 | 0.48 |
| STTD P, %5 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 |
1Phase 2 diets were fed from days 7 to 21 (~6.7 to 10.9 kg).
2Provided per kilogram 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.
3Provided per kilogram of premix: 3,527,399 IU vitamin A; 881,850 IU vitamin D; 17,637 IU vitamin E; 1,764 mg vitamin K; 15.4 mg vitamin B12; 33,069 mg niacin; 11,023 mg pantothenic acid; 3,307 mg riboflavin.
4HiPhos 2700 (DSM Nutritional Products, Parsippany, NJ) provided an estimated release of 0.10% STTD P.
5Standardized total tract digestible phosphorus.