Table 1.
Ingredient composition of experimental diets containing 100% SID Leu:Lys ratio, as-fed basis1
| SID Ile:Lys, % | 43 | 53 | 63 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Item, % | SID Val:Lys, % | 60 | 70 | 80 | 60 | 70 | 80 | 60 | 70 | 80 |
| Ground corn | 32.35 | 32.35 | 32.35 | 32.35 | 32.35 | 32.35 | 32.35 | 32.35 | 32.35 | |
| Ground wheat | 22.00 | 22.00 | 22.00 | 22.00 | 22.00 | 22.00 | 22.00 | 22.00 | 22.00 | |
| Ground barley | 28.00 | 28.00 | 28.00 | 28.00 | 28.00 | 28.00 | 28.00 | 28.00 | 28.00 | |
| Soy protein concentrate | 7.60 | 7.60 | 7.60 | 7.60 | 7.60 | 7.60 | 7.60 | 7.60 | 7.60 | |
| Spray-dried blood cells | 1.16 | 1.16 | 1.16 | 1.16 | 1.16 | 1.16 | 1.16 | 1.16 | 1.16 | |
| Soybean oil | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 | |
| l-Lys∙HCl | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 | |
| dl-Met | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | |
| l-Thr | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | |
| l-Trp | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | |
| l-Leu | — | — | — | — | — | — | — | — | — | |
| l-Ile | — | — | — | 0.10 | 0.10 | 0.10 | 0.20 | 0.20 | 0.20 | |
| l-Val | — | 0.10 | 0.20 | — | 0.10 | 0.20 | — | 0.10 | 0.20 | |
| Gly | 1.35 | 1.30 | 1.25 | 1.30 | 1.25 | 1.20 | 1.25 | 1.20 | 1.15 | |
| Cornstarch | 1.05 | 1.00 | 0.95 | 1.00 | 0.95 | 0.90 | 0.95 | 0.90 | 0.85 | |
| Limestone | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | 1.20 | |
| Monocalcium phosphate | 0.90 | 0.90 | 0.90 | 0.90 | 0.90 | 0.90 | 0.90 | 0.90 | 0.90 | |
| Salt | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | 0.40 | |
| Vitamin–mineral premix2 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | |
1Nine additional diets that were similar to the above diets with the exception that the SID Leu:Lys ratio was 300% instead of 100% were also formulated. This was accomplished by including 2.0% l-Leu in all diets and reducing both Gly and cornstarch inclusion to 0.20%.
2The vitamin–micromineral premix provided the following quantities of vitamins and microminerals per kilogram of complete diet: Vitamin A as retinyl acetate, 11,136 IU; vitamin D3 as cholecalciferol, 2,208 IU; vitamin E as dl-alpha tocopheryl acetate, 66 IU; vitamin K as menadione dimethylprimidinol bisulfite, 1.42 mg; thiamin as thiamine mononitrate, 0.24 mg; riboflavin, 6.59 mg; pyridoxine as pyridoxine hydrochloride, 0.24 mg; vitamin B12, 0.03 mg; d-pantothenic acid as d-calcium pantothenate, 23.5 mg; niacin, 44.1 mg; folic acid, 1.59 mg; biotin, 0.44 mg; Cu, 20 mg as copper sulfate and copper chloride; Fe, 126 mg as ferrous sulfate; I, 1.26 mg as ethylenediamine dihydriodide; Mn, 60.2 mg as manganese sulfate; Se, 0.3 mg as sodium selenite and selenium yeast; and Zn, 125.1 mg as zinc sulfate.