del Barrio A S, Schrama J W, van der Hel W, Beltman H M, Verstegen M W
Department of Animal Husbandry, Agricultural University, Wageningen, The Netherlands.
J Anim Sci. 1993 Jul;71(7):1754-60. doi: 10.2527/1993.7171754x.
An experiment was performed to evaluate alterations of energy metabolism with time in 10 groups of 16 barrows just after transportation. Ten-week-old pigs were fed at once (four groups; LF) or twice (three groups; MF) maintenance level (35 and 75 g.kg-.75.d-1, respectively), or allowed ad libitum access to feed (three groups; HF). The 13.5-d experimental period was divided into two balance periods. Heat production (HP) decreased with time. The changes in HP with time were different among feeding level groups (P < .001); the LF group had the greatest decrease. Metabolizable energy intake remained constant with time for the LF and MF groups and decreased for the HF group. Requirements for maintenance energy and efficiency of ME for growth decreased with time. Feeding level influenced (P < .001) energy retention (ER) during the total experimental period. The LF group had a negative ER (-65 kJ.kg-.75.d-1), whereas in the MF and HF groups positive values for ER were obtained (346 and 757 kJ.kg-.75.d-1, respectively). At all feeding levels, animals had a positive protein gain. The level differed between feeding levels (P < .001). Differences among groups (P < .001) were observed in energy retained as fat. Data from the present experiment show that young pigs are not in a steady state of energy metabolism during the 2 wk after transportation. During this period, the relationship between metabolic rate and feed intake alters with time.
进行了一项实验，以评估10组共16头刚运输后的仔猪能量代谢随时间的变化。10周龄的猪一次性（4组；低采食水平组）或分两次（3组；中等采食水平组）给予维持水平的饲料（分别为35和75 g·kg⁻⁰·⁷⁵·d⁻¹），或自由采食（3组；高采食水平组）。13.5天的实验期分为两个平衡期。产热量（HP）随时间下降。不同采食水平组的HP随时间的变化不同（P < 0.001）；低采食水平组下降幅度最大。低采食水平组和中等采食水平组的可代谢能摄入量随时间保持恒定，高采食水平组则下降。维持能量需求和用于生长的代谢能效率随时间降低。采食水平影响整个实验期的能量保留（ER）（P < 0.001）。低采食水平组的ER为负值（-65 kJ·kg⁻⁰·⁷⁵·d⁻¹），而中等采食水平组和高采食水平组的ER为正值（分别为346和757 kJ·kg⁻⁰·⁷⁵·d⁻¹）。在所有采食水平下，动物都有正的蛋白质增加量。不同采食水平之间该增加量存在差异（P < 0.001）。在以脂肪形式保留的能量方面观察到组间差异（P < 0.001）。本实验数据表明，仔猪在运输后的2周内能量代谢不处于稳定状态。在此期间，代谢率与采食量之间的关系随时间改变。
