Spratt R S, Bayley H S, McBride B W, Leeson S
Department of Animal and Poultry Science, College of Biological Sciences, University of Guelph, Ontario, Canada.
Poult Sci. 1990 Aug;69(8):1339-47. doi: 10.3382/ps.0691339.
The partitioning of AME intake (MEI) and recovered energy (RE; defined as MEI minus heat production) was investigated on Hubbard broiler-breeder hens (BB) by using indirect calorimetry and energy balance. The regression of RE on MEI was linear (R2 = .96; P less than .01) with a slope of .817 +/- .024 (SE) and a y-intercept of -238.3 +/- 10.7 (SE). The maintenance energy requirement was 292 kilojoule (kJ) per kg per day (367 kJ per kg.75 per day). The regression of body RE, defined as RE minus egg energy, on MEI was linear (R2 = .96; P less than .01) with a slope of .799 +/- .045 (SE) and a y-intercept of -344.9 +/- 19.7 (SE). Therefore, an MEI of 432 kJ per kg per day was required by BB hens to maintain body energy equilibrium when they were laying at approximately 85% production. At an MEI of less than 432 kJ per kg per day, body energy was used for egg production. The AME cost of depositing 1 kJ of body, egg, protein, or fat energy was (mean +/- SE) 1.21 +/- .06, 91 +/- .32, 1.96 +/- .71, and 1.05 +/- .15 kJ, respectively. The results indicate that individually caged BB hens between 28 and 36 wk of age in a thermal-neutral environment (21 C) require approximately 1.6 megajoule (MJ) of AME per bird per day for normal growth (3 g/per day) and egg production (85%).
通过间接量热法和能量平衡研究了哈伯德肉种鸡对表观代谢能摄入量（AMEI）和回收能量（RE；定义为AMEI减去产热）的分配情况。RE对AMEI的回归呈线性关系（R2 = 0.96；P小于0.01），斜率为0.817±0.024（标准误），y轴截距为-238.3±10.7（标准误）。维持能量需求为每千克每天292千焦（kJ）（每千克0.75次方每天367 kJ）。定义为RE减去蛋能量的体RE对AMEI的回归呈线性关系（R2 = 0.96；P小于0.01），斜率为0.799±0.045（标准误），y轴截距为-344.9±19.7（标准误）。因此，当肉种鸡产蛋率约为85%时，维持体能量平衡每天每千克需要432 kJ的AMEI。当AMEI低于每天每千克432 kJ时，体能量用于产蛋。沉积1 kJ体能量、蛋能量、蛋白质能量或脂肪能量的AME成本分别为（均值±标准误）1.21±0.06、91±0.32、1.96±0.71和1.05±0.15 kJ。结果表明，在热中性环境（21℃）中，28至36周龄单独笼养的肉种鸡正常生长（每天3克）和产蛋（85%）时，每只鸡每天约需要1.6兆焦（MJ）的AME。
