Table 1.
Composition of the diets used in the grower pig study during the supplementation and HS phases
| Ingredient | Control | E-ZnB |
|---|---|---|
| Diet composition, % as fed | ||
| Corn, yellow dent | 72.37 | 71.62 |
| Soybean meal, 46.5% CP | 23.88 | 23.88 |
| Soybean oil | 0.40 | 0.40 |
| Vitamin premix1 | 0.15 | 0.15 |
| Mineral premix2 | 0.15 | 0.15 |
| Salt | 0.50 | 0.50 |
| Limestone | 1.06 | 1.06 |
| Monocalcium phosphate 21% | 1.12 | 1.12 |
| l-Lysine HCl | 0.25 | 0.25 |
| dl-Methionine | 0.05 | 0.05 |
| l-Threonine | 0.07 | 0.07 |
| E-ZnB3 | — | 0.75 |
| Total | 100 | 100 |
| Calculated composition, % as fed4 | ||
| Dry matter, % | 89.6 | 89.6 |
| DE, kcal/kg | 3,477 | 3,477 |
| ME, kcal/kg | 3,330 | 3,330 |
| NE, kcal/lb | 2,432 | 2,432 |
| Crude protein, % | 17.4 | 17.4 |
| ADF, % | 3.6 | 3.6 |
| NDF, % | 9.4 | 9.4 |
| SID Lys, % | 0.97 | 0.97 |
| Calcium, % | 0.7 | 0.7 |
| Phosphorous, % | 0.6 | 0.6 |
| Digestible phosphorous, % | 0.3 | 0.3 |
| Zinc, ppm | 166 | 985 |
| Butyrate, ppm | — | 2,181 |
| Zinc concentration, ppm, assayed | 154.6 | 1,020.7 |
| Butyrate concentration, ppm, calculated5 | — | 2,306.3 |
1Vitamins provided per kilogram of diet: 6,125 IU vitamin A, 700 IU vitamin D3, 50 IU vitamin E, 30 mg vitamin K, 0.05 mg vitamin B12, 11 mg riboflavin, 56 mg niacin, and 27 mg pantothenic acid.
2Minerals provided per kilogram of diet: 22 mg Cu (as CuSO4), 220 mg Fe (as FeSO4), 0.4 mg I (as Ca(IO3)2), 52 mg Mn (as MnSO4), 220 mg Zn (as ZnSO4), and 0.4 mg Se (as Na2SeO3).
3E-ZnB = encapsulated zinc butyrate.
4DE = digestible energy; ME = metabolizable energy; NE = net energy; ADF = acid detergent fiber; NDF = neutral detergent fiber.
5Butyrate’s value was calculated from the assayed zinc concentration of the E-ZnB diet. Background zinc values from the control diet was subtracted from the E-ZnB diet before calculating the butyrate content; w/w ratio of butyrate:zinc is 2.66.