Table 2.
Ingredient composition and chemical analysis of diets containing 2.1 to 3.3 g/Mcal of SID-Lys:ME ratio fed to sows in Exp. 2 (as fed basis)
| SID-Lys:ME ratio, g/Mcal | |||||
|---|---|---|---|---|---|
| 2.1 | 2.4 | 2.7 | 3.0 | 3.3 | |
| Ingredient, % | |||||
| Corn | 58.70 | 64.50 | 64.32 | 64.06 | 64.60 |
| Soybean meal, (CP, 43%) | 23.00 | 24.80 | 24.77 | 25.00 | 24.30 |
| Wheat bran | 11.56 | 5.14 | 4.92 | 4.47 | 4.01 |
| Soybean oil | 2.80 | 1.50 | 1.60 | 1.70 | 1.90 |
| Limestone | 1.64 | 1.64 | 1.64 | 1.64 | 1.64 |
| Salt | 0.60 | 0.60 | 0.60 | 0.60 | 0.60 |
| Dicalcium phosphate | 0.84 | 0.84 | 0.84 | 0.84 | 0.84 |
| L-Lysine HCl (98%) | -- | 0.08 | 0.21 | 0.34 | 0.48 |
| Methionine hydroxy analogue1 | 0.02 | 0.06 | 0.14 | 0.21 | 0.29 |
| L-Threonine (98%) | -- | -- | 0.03 | 0.10 | 0.18 |
| L-Valine (98%) | -- | -- | 0.08 | 0.17 | 0.26 |
| L-Tryptophan (98%) | -- | -- | 0.01 | 0.03 | 0.06 |
| Vitamin-mineral premix2 | 0.84 | 0.84 | 0.84 | 0.84 | 0.84 |
| Analyzed composition, % | |||||
| Crude protein | 17.45 | 17.63 | 17.69 | 17.70 | 17.67 |
| Lysine | 0.80 | 0.89 | 1.00 | 1.08 | 1.21 |
| Threonine | 0.65 | 0.68 | 0.70 | 0.79 | 0.85 |
| Valine | 0.77 | 0.77 | 0.86 | 0.93 | 1.01 |
| Methionine + cysteine | 0.52 | 0.58 | 0.66 | 0.70 | 0.78 |
| Calcium | 0.95 | 0.95 | 0.96 | 0.96 | 0.94 |
| Phosphorus | 0.46 | 0.47 | 0.45 | 0.46 | 0.47 |
| Calculated composition | |||||
| ME, Mcal/kg3 | 3.24 | 3.25 | 3.25 | 3.24 | 3.24 |
| SID-lysine, %4 | 0.68 | 0.77 | 0.87 | 0.98 | 1.07 |
| SID-Lys:ME raio, g/Mcal | 2.1 | 2.4 | 2.7 | 3.0 | 3.3 |
1DL-methionine hydroxy analogue (84%) provided by Novus International, St. Louis, MO
2Premix supplied per kilogram of diet: Vitamin A, 12,000 IU; vitamin D3, 2,000 IU; vitamin E, 24 IU; vitamin K3, 2.0 mg; vitamin B1, 2.0 mg; vitamin B2, 6.0 mg; vitamin B6, 4.0 mg; vitamin B12, 24 μg; niacin, 30 mg; pantothenic acid, 20 mg; folic acid, 3.6 mg; biotin, 0.40 mg; choline, 0.40 g; iron, 96 mg; copper, 8.0 mg; zinc, 120 mg; manganese, 40 mg; iodine, 0.56 mg; selenium, 0.40 mg; and phytase, 120 mg
3The metabolizable energy content of corn, soybean meal, and wheat bran were determined previously in our laboratory (data not published). Metabolizable energy of soybean oil was obtained from the Agriculture Industry Standard of China (2004) and was calculated as 96% of DE
4Standardized ileal digestible lysine was determined previously using pigs surgically equipped with a T-cannula in the distal ileum. The basal ileal endogenous losses were measured by feeding a nitrogen-free diet (data not published).