Reid B L, Valencia M E, Maiorino P M
Poult Sci. 1978 Mar;57(2):461-5. doi: 10.3382/ps.0570461.
The energetic efficiency of metabolizable energy conversion to net energy for maintenance and/or production was determined in laying hens. The techniques employed indicated that maintenance and production had essentially the same efficiencies (.619 and .628, respectively). Fasting heat production was 69.28 kcal/Wkg75 (physiological body weight) and the maintenance requirement was 111.1 kcal/Wkg75. Limiting metabolizable energy intake in laying hens reduced both egg weight and hen-day production. Regression equations predicted a reduction of 1.53 g in egg weight and a reduction of 2.5% in egg production for each 10 kcal metabolizable energy reduction in intake. This paper reports techniques which may be employed for energetic efficiency evaluations of feedstuffs, mixed diets, and energy utilization by laying hens in short term studies.
测定了蛋鸡将可代谢能量转化为维持和/或生产净能的能量效率。所采用的技术表明，维持和生产的效率基本相同（分别为0.619和0.628）。绝食产热量为69.28千卡/瓦千克75（生理体重），维持需要量为111.1千卡/瓦千克75。限制蛋鸡的可代谢能量摄入量会降低蛋重和产蛋率。回归方程预测，每减少10千卡可代谢能量摄入量，蛋重会减少1.53克，产蛋率会降低2.5%。本文报告了可用于短期研究中评估蛋鸡饲料原料、混合日粮和能量利用能量效率的技术。
