这项研究的目的是调查累计驱逐间隔,垫料大小,和出生顺序影响高产量母猪新生仔猪的特性,以及他们的初乳摄入量。对254头母猪的分娩时间方面进行了分析,包括3920只仔猪。检查的新生仔猪特征包括分娩时间,出生顺序,出生状况,脐带断裂,胎粪染色,交货方便,出生体重,血氧饱和度,和心率。从原始数据来看,初乳摄入量,出生间隔,计算每只仔猪的累计出生间隔。根据累积排出间隔将仔猪分为九类:0-30、31-60、61-90、91-120、121-150、151-180、181-210、211-240和>240分钟。凋落物大小分为三组:每窝10-13、14-17和≥18只仔猪。出生顺序排名是指仔猪在产仔中的位置,分为四个四分位数:1、2、3和4。平均而言,驱逐间隔,累计驱逐间隔,初乳消耗量为14.8±21.8min,138.6±155.7min,407.6±162.1g,分别。在有≥18只仔猪的垃圾中,与10-13只仔猪相比,初乳摄入量不足(<300g)的仔猪百分比更高(33.1%vs.12.9%,P<0.001)和14-17只仔猪(23.9%,P<0.001)。产仔数第四四分位数的死胎发生率高于第一四分位数(16.0%vs.2.2%,P<0.001),第二(4.0%,P<0.001),第三(7.8%,P<0.001)四分位数。在有≥18只仔猪的窝中,与在第一四分位数出生的人相比,在第三四分位数出生的人表现出更低的初乳消耗(346.0±9.9vs.391.4±8.6g,P=0.028)。初乳摄入量随着累积排出间隔的延长而减少,与产仔前30分钟内出生的仔猪相比,产仔后90分钟开始显着下降(P=0.004)。有趣的是,初乳消耗量与累积排出间隔呈负相关(P<0.001),但与个别仔猪驱逐间隔无关(P=0.460)。胎粪染色的仔猪在累积排出间隔>240分钟的仔猪中最为普遍。总之,累计驱逐间隔和出生顺序均显着影响新生仔猪的生理特性和初乳摄入量。初乳消耗量减少,新生仔猪特征随着累积驱逐间隔的增加而改变。确定处于缺氧高风险的仔猪,并在最佳时间范围内实施适当的治疗和管理策略,可以帮助猪生产者降低高产量母猪出生的仔猪的断奶前死亡率。
The objective of this study was to investigate how the cumulative expulsion interval, litter size, and birth order influence the characteristics of newborn piglets from hyperprolific sows, as well as their intake of colostrum. Analysis was conducted on the temporal aspects of parturition in 254 sows, including 3920 piglets. Newborn piglet characteristics examined encompassed delivery time, birth order, birth status, umbilical cord rupture, meconium staining, delivery ease, birth weight, blood oxygen saturation, and heart rate. From the raw data, colostrum intake, birth interval, and cumulative birth interval of each piglet were computed. Piglets were sorted based on the cumulative expulsion interval into nine categories: 0-30, 31-60, 61-90, 91-120, 121-150, 151-180, 181-210, 211-240, and >240 min. Litter sizes were categorized into three groups: 10-13, 14-17, and ≥18 piglets per litter. The birth-order ranking referred to the piglet\'s position within a litter and was categorized into four quartiles: 1, 2, 3, and 4. On average, the expulsion interval, cumulative expulsion interval, and colostrum consumption were 14.8 ± 21.8 min, 138.6 ± 155.7 min, and 407.6 ± 162.1 g, respectively. In litters with ≥18 piglets, the percentage of piglets with inadequate colostrum intake (<300 g) was higher compared to litters with 10-13 piglets (33.1 % vs. 12.9 %, P < 0.001) and 14-17 piglets (23.9 %, P < 0.001). The occurrence of stillbirths in the fourth quartile of the litter was higher than in the first (16.0 % vs. 2.2 %, P < 0.001), second (4.0 %, P < 0.001), and third (7.8 %, P < 0.001) quartiles. Among litters with ≥18 piglets, those born in the third quartile exhibited lower colostrum consumption compared to those born in the first quartile (346.0 ± 9.9 vs. 391.4 ± 8.6 g, P = 0.028). Colostrum intake decreased with longer cumulative expulsion intervals, evident from a notable decline starting at 90 min post-farrowing compared to piglets born within the first 30 min (P = 0.004). Interestingly, colostrum consumption exhibited a negative correlation with the cumulative expulsion interval (P < 0.001), but not with individual piglet expulsion intervals (P = 0.460). Piglets born with meconium staining were most prevalent among those with a cumulative expulsion interval of >240 min. In summary, both the cumulative expulsion interval and birth-order ranking significantly impact the physiological characteristics of newborn piglets and their colostrum intake. Colostrum consumption decreases and newborn piglet characteristics change with higher cumulative expulsion intervals. Identifying piglets at high risk of hypoxia and implementing appropriate treatments and management strategies within an optimal timeframe could aid pig producers in reducing pre-weaning mortality among piglets born to hyperprolific sows.