Table 4.
Diet composition, experiment 2 (as-fed basis)1
| 21% CP | 18% CP, no ZnO | ||||
|---|---|---|---|---|---|
| Ingredient, % | ZnO | No ZnO | 1.2% lysine | 1.35% lysine | 1.35% lysine + NEAA |
| Corn | 53.15 | 53.45 | 60.55 | 60.00 | 57.60 |
| Soybean meal, 46.5% CP | 28.75 | 28.70 | 21.35 | 21.25 | 21.40 |
| Dried whey | 10.00 | 10.00 | 10.00 | 10.00 | 10.00 |
| CWB | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 |
| Calcium carbonate | 0.95 | 0.95 | 0.95 | 0.95 | 0.95 |
| Monocalcium phosphate, 21% P | 0.80 | 0.80 | 0.90 | 0.90 | 0.90 |
| Salt | 0.55 | 0.55 | 0.55 | 0.55 | 0.55 |
| l-Lysine | 0.50 | 0.50 | 0.54 | 0.74 | 0.74 |
| dl-Methionine | 0.20 | 0.20 | 0.23 | 0.31 | 0.31 |
| l-Threonine | 0.24 | 0.24 | 0.24 | 0.34 | 0.34 |
| l-Tryptophan | 0.03 | 0.03 | 0.07 | 0.11 | 0.11 |
| l-Valine | 0.10 | 0.10 | 0.17 | 0.27 | 0.27 |
| l-Isoleucine | — | — | — | 0.13 | 0.13 |
| l-Histidine | — | — | — | 0.04 | 0.04 |
| Trace mineral premix2 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 |
| Vitamin premix3 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
| Phytase4 | 0.08 | 0.08 | 0.08 | 0.08 | 0.08 |
| Zinc oxide | 0.25 | — | — | — | — |
| Glycine | — | — | — | — | 1.10 |
| Glutamic acid | — | — | — | — | 1.10 |
| Total | 100 | 100 | 100 | 100 | 100 |
| Calculated analysis | |||||
| Standardized digestible (SID) amino acids, % | |||||
| Lysine | 1.35 | 1.35 | 1.20 | 1.35 | 1.35 |
| Isoleucine:lysine | 55 | 55 | 52 | 55 | 55 |
| Leucine:lysine | 110 | 111 | 110 | 97 | 96 |
| Methionine:lysine | 35 | 35 | 39 | 40 | 40 |
| Methionine and cysteine:lysine | 57 | 57 | 61 | 60 | 59 |
| Threonine:lysine | 65 | 65 | 65 | 65 | 65 |
| Tryptophan:lysine | 18.9 | 18.9 | 21.0 | 21.1 | 21.1 |
| Valine:lysine | 67 | 67 | 70 | 70 | 69 |
| Histidine:lysine | 35 | 35 | 33 | 32 | 32 |
| Total lysine, % | 1.49 | 1.49 | 1.32 | 1.47 | 1.47 |
| Metabolizable energy, kcal/kg | 3,227 | 3,236 | 3,245 | 3,254 | 3,247 |
| Net energy, kcal/kg | 2,389 | 2,396 | 2,440 | 2,446 | 2,440 |
| SID lysine:net energy, g/Mcal | 5.64 | 5.62 | 4.91 | 5.51 | 5.52 |
| CP, % | 20.7 | 20.7 | 17.9 | 18.3 | 20.1 |
| Calcium, % | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 |
| Phosphorus, % | 0.62 | 0.62 | 0.61 | 0.61 | 0.60 |
| Available phosphorus, % | 0.46 | 0.46 | 0.47 | 0.47 | 0.47 |
| STTD P, %5 | 0.51 | 0.51 | 0.51 | 0.51 | 0.50 |
1Experimental diets were fed from ~days 0 to 13 (7.0 to 11.7 kg in experiment 2, and 6.2 to 11.9 kg in experiment 3).
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.