A total of 144 barrows were distributed into four treatment groups. One group was housed conventionally and fasted for 16 h preslaughter, while the other three groups were housed in enriched conditions (straw-bedding and low density) and fasted for 16, 24 and 32 h preslaughter. When compared with conventionally-housed pigs, enriched-housed pigs were heavier (P < .05) and fatter (P < .01), but easier to handle at loading (P < .05) and produced less exudative pork (P < .05) possibly resulting from a lower post-mortem muscle glycolytic potential (P = .10). Extending fasting time up to 32 h reduced dressing yield (P < .001) and increased skin lesion scores (P < .01), but did not result in any clear or major effect on muscle metabolism and meat quality. In conclusion, given the beneficial effects of enriched housing conditions on stress response and pork quality, the application of an extended fasting time (32h) preslaughter is not required for this production.

总共144个手推车被分配到四个处理组中。一组按常规方式饲养，禁食前16小时，而其他三组则在丰富的条件下（秸秆堆积和低密度）饲养，并禁食16、24和32小时。与常规饲养的猪相比，浓缩饲养的猪较重（P  <.05）和较胖（P  <.01），但在装载时更易于处理（P  <.05），并且产生的渗出猪肉较少（P  <。 05）可能是由于事后肌肉糖酵解潜能较低（P  = .10）。将禁食时间延长至32小时会降低敷料良率（P  <.001）和增加皮肤病变分数（P  <.01），但对肌肉的新陈代谢和肉质没有明显或重大影响。总之，鉴于丰富的饲养条件对应激反应和猪肉品质的有益影响，因此该生产不需要延长禁食时间（32 h）的宰杀。