Table 1.

Composition of diets

Component	g/kg
Wheat	650
Soyabean meal	200.5
Full fat soya	40
Fish meal	40
Soya/tallow blend	25
Limestone	8
Dicalcium phosphate	14
Trace minerals/vitamins*	5
Sodium bicarbonate	2
Salt	2
Choline chloride	0.5
Lysine**	2.5
Methionine**	4.7
Threonine**	2.8
Maize starch**	3.0

^*The trace mineral/vitamin mixture supplied (per kg feed): retinol 3.6 mg, cholecalciferol 0.125 mg, α-tocopherol 50 mg, thiamine 2 mg, riboflavin 7 mg, vitamin K 3 mg, pyridoxine 5 mg, nicotininc acid 50 mg, calcium pantothenate 15 mg, folic acid 1 mg, biotin 0.2 mg, cobalamin 15 μg, manganese 100 mg, iron 80 mg, zinc 80 mg, copper 10 mg, iodine 1 mg, cobalt 0.5 mg, selenium 0.2 mg, molybdenum 0.5 mg.

^**For each wheat sample inclusions of lysine, methionine, threonine and maize starch were adjusted on the basis of the determined amino acid analysis of the wheat to equalise total concentrations across all diets.