Table 1 Ingredient and chemical composition of the experimental diets
Trial 1 | Trial 2 | |||
|---|---|---|---|---|
Treatments | 1 | 2 | 1 | 2 |
δ13C, ‰ | −17.90 | −13.89 | −21.76 | −19.34 |
δ15N, ‰ | 3.08 | 2.37 | 0.53 | 4.73 |
Ingredients, % | ||||
Fish meal | 0.00 | 0.00 | 0.00 | 20.00 |
Corn | 2.35 | 44.95 | 30.85 | 20.45 |
Casein | 11.00 | 8.80 | 0.00 | 0.00 |
Soybean meal | 0.00 | 20.00 | 37.80 | 0.00 |
Wheat middling | 60.00 | 0.00 | 5.00 | 33.00 |
Sugar | 9.00 | 9.00 | 9.00 | 9.00 |
Soybean oil | 7.00 | 7.00 | 7.00 | 7.00 |
Cellulose acetate | 5.00 | 5.00 | 5.00 | 5.00 |
Mineral premix | 3.50 | 3.50 | 3.50 | 3.50 |
Vitamin premix1 | 1.00 | 1.00 | 1.00 | 1.00 |
L-arginine | 0.70 | 0.35 | 0.00 | 0.55 |
L-threonine | 0.10 | 0.00 | 0.10 | 0.10 |
L-methionine | 0.03 | 0.15 | 0.20 | 0.03 |
L-lysine | 0.12 | 0.08 | 0.30 | 0.15 |
Choline | 0.25 | 0.25 | 0.25 | 0.25 |
Nutritional level2 | ||||
Gross energy, MJ/kg | 18.11 | 18.90 | 19.19 | 18.54 |
Crude protein, % | 20.82 | 20.32 | 20.78 | 21.18 |
Arginine, % | 1.80 | 1.81 | 1.80 | 1.83 |
Histidine, % | 0.69 | 0.69 | 0.69 | 0.73 |
Lysine, % | 1.35 | 1.35 | 1.39 | 1.36 |
Methionine + cysteine, % | 0.80 | 0.82 | 0.84 | 0.80 |
Threonine, % | 0.87 | 0.82 | 0.87 | 0.87 |
Tryptophan, % | 0.28 | 0.25 | 0.25 | 0.24 |
Calcium, % | 1.46 | 1.48 | 1.48 | 1.50 |
Phosphorus, % | 1.19 | 1.11 | 1.12 | 1.24 |