Table 1.
Composition of experimental diets (on an air dry basis; g/kg)*
| Gilt developer diet | Dry sow diet | Lactation diet | |
|---|---|---|---|
| Wheat | 423·9 | ||
| Barley | 832·9 | 892·9 | 350 |
| Soyabean meal (50 % crude protein) | 75 | 75 | 160 |
| Soyabean oil | 70 | 10 | 40 |
| Mineral and vitamins | 1·5 | 1·5 | 1·5 |
| Lysine HCl† | 0·5 | 0·5 | 2·0 |
| dl-Methionine† | 0 | 0 | 0·7 |
| l-Threonine† | 0 | 0 | 0·8 |
| Di-calcium phosphate | 5 | 5 | 5 |
| Limestone flour | 11 | 11 | 12 |
| Salt | 4 | 4 | 4 |
| Phytase‡ | 0·1 | 0·1 | 0·1 |
| Chemical composition | |||
| DM | 870 | 871 | 873 |
| Crude protein | 153 | 116 | 158 |
| Crude fat | 85 | 26 | 39 |
| Crude fibre | 32 | 34 | 30 |
| Ash | 39 | 36 | 43 |
| Lysine§ | 5·85 | 6·2 | 9·1 |
| Digestible energy (MJ/kg)§ | 14·3 | 13·0 | 14·2 |
*
Dry sow diet and lactation diet provided (mg/kg completed diet): Cu, 30 mg; Fe, 70 mg; Mn, 62 mg; Zn, 80 mg; I, 0·6 mg; Se, 0·2 mg; vitamin A as retinyl acetate, 3 mg; vitamin D3, as cholecalciferol, 25 μg; vitamin E as dl-α-tocopheryl acetate, 100 mg; vitamin K, 2 mg; vitamin B12, 15 µg; riboflavin, 5 mg; nicotinic acid, 12 mg; pantothenic acid, 10 mg; choline chloride, 500 mg; biotin, 200 µg; folic acid, 5 mg; thiamin, 2 mg; pyridoxine, 3 mg.
† Synthetic amino acids.
‡ Sow diets contained 500 phytase units (FTU) per kg finished feed from Natuphos 5000 (BASF).
§ Calculated from standard book values for ingredients.