2006 Abstracts - American Society of Animal Science

pairs of pigs (48 pairs entire male, 48 pairs female) were weaned at 28days (8.0 ± 0.75 kg) and given commercial starter and link diets untilassigned to treatment 19 days post weaning (15.3 ± 1.49 kg). Six treatmentswere arranged in a completely randomised block design. Isoenergeticcereal diets (14.0 MJ DE/kg; barley, wheat, soyabean, with added vitamins,minerals and amino acids) had increasing lysine concentrations(9.6, 10.7, 11.5, 12.4, 13.1 and 14.1 g/kg), and constant ratios of methionineplus cystine, threonine and tryptophan to lysine(0.60:0.69:0.21:1). Experimental diets were provided for 28 days, untilpigs were 32.8 ± 3.33 kg. Performance results are presented in Table 1.A quadratic effect of increasing dietary lysine concentration was significantfor both average daily gain (ADG; P