Archiv für Geflügelkunde vol:71 issue:6 pages:247-257
Male chickens of two pure broiler breeder (S1 and S2) and a broiler cross line Ross 308 (BC) were reared from 0-35 days of age and were fed three dietary regimes with different lysine to apparent metabolizable energy (Lys/AME) ratios. Chickens were subjected to low ambient temperatures to stimulate the development of ascites. The objectives of the experiment was to evaluate effects of different ratios lysine to apparent metabolizable energy (Lys/AME) in diets, at different ages, on following indicators in metabolism for ascites susceptibility: arterial and venous blood gas pressures (paCO(2), pvCO(2), paO(2) and pvO(2)), heat production (Hp), plasma thyroid hormone concentrations (triiodothyronine, T-3 and thyroxine, T-4) and proportional organ weights (lung, liver and heart). Measurements were carried out at 2 and 5 wk of age.