Effects of dietary energy concentration on utilisation of energy by broiler chickens and on body composition determined by carcass analysis and predicted using tritium.

摘要: Synopsis Groups of 10 male, female and unsexed broiler chickens were given eight diets with energy concentrations ranging from 2.3 to 3.6 Mcal ME/kg in two experiments. Diets a metabolisable concentration about 3.1 Mcal/kg found be optimal for growth specified live‐weight. Carcass analysis gave much smaller values nitrogen retention than did estimates food intake excreta. Retention measured by the latter method was influenced diets. Body composition both dietary sex. In general, fat content carcass increased increasing although there overall differences between male chickens, also birds experiment 1 2. Tritiated water used predict body space enabling estimated. Comparisons determined tritiated sp...