Table 1.
Composition of the experimental diets (mean ± SD)
| Items | Cu supplementation, mg kg−1 diet | ||
|---|---|---|---|
| LC (6) | CON (20) | HC (300) | |
| Ingredient (%) | |||
| Corn | 69.00 | ||
| Soybean meal | 14.00 | ||
| Extruded soybeans | 5.00 | ||
| Self-made premixa | 12.00 | ||
| Nutrition level (%)b | |||
| Dry matter | 87.24 | ||
| Crude protein | 17.86 | ||
| Crude fat | 1.98 | ||
| Crude fiber | 4.15 | ||
| Ash | 4.76 | ||
| Measured Cu value (μg g−1) | 5.90 ± 1.04 | 23.14 ± 3.59 | 295.31 ± 14.80 |
aIngredients: fish meal, choline chloride, vitamin, mineral elements, l-lysine hydrochloride, calcium hydro phosphate, stone powder, sodium chloride, enzyme preparation, flavoring agent, and sweetening agent. No antibiotics were added
bMeasured values