Samuel Ryan S, Darrington Joseph E, St-Pierre Benoit, Levesque Crystal L, Thaler Robert C
Department of Animal Science, South Dakota State University, Brookings, SD 57007, USA.
Animals (Basel). 2025 May 17;15(10):1451. doi: 10.3390/ani15101451.
Available floor space allocation recommendations are based on considerably lighter market-weight pigs than currently in the United States (i.e., ~130 kg). Therefore, the objective of this study was to investigate the effects of individual floor space allocation on overall growth performance and carcass characteristics of pigs raised to >135 kg. Over 49 d, three floor space per pig allocations were tested: 0.88, 0.75, and 0.61 m/pig. When the average weight of pigs in the barn reached 135 kg, the heaviest pigs from each pen were marketed in four cuts, approximately one week apart. Overall, weekly feed disappearance per pig, the mean body weights of pigs, and gain:feed was not affected by floor space allocation ( > 0.10). Pigs remaining in pens with 0.61 m/pig tended ( < 0.09) to be lighter after the first cut than pigs raised with 0.88 m/pig. However, there was no difference in body weight between the floor space allocations when the final group was marketed (143.9 ± 0.6 kg; = 0.13). Carcass lean percent tended ( = 0.08) to be greater (56.8 vs. 56.4%) from pigs provided 0.61 m/pig of floor space.
现有的猪舍地面空间分配建议所依据的猪体重比美国目前的猪（即约130千克）要轻得多。因此，本研究的目的是调查每头猪的地面空间分配对体重超过135千克的猪的整体生长性能和胴体特性的影响。在49天的时间里，对每头猪的三种地面空间分配进行了测试：0.88、0.75和0.61平方米/头。当猪舍内猪的平均体重达到135千克时，每个围栏中最重的猪被分成四批出售，每批间隔约一周。总体而言，每头猪每周的饲料消耗量、猪的平均体重以及增重：饲料比均不受地面空间分配的影响（P>0.10）。在第一次出售后，饲养在每头猪占用0.61平方米空间围栏中的猪往往（P<0.09）比饲养在每头猪占用0.88平方米空间围栏中的猪体重更轻。然而，在最后一批猪出售时（143.9±0.6千克；P = 0.13），不同地面空间分配的猪体重并无差异。每头猪占用0.61平方米地面空间的猪的胴体瘦肉率往往更高（56.8%对56.4%，P = 0.08）。
