■本研究调查了妊娠早期不同喂养方式对受胎率的影响,凋落物性状,仔猪出生体重,初产母猪的产仔均匀性。
■总共,对108头初产母猪进行了授精,并分配给任一标准(1.9±0.5kg/天,S)或高(2.9±0.8kg/天,H)妊娠前35天的喂养水平。根据妊娠期对喂养方式进行分类:1至3、4至15和16至35天,分为四组:SSS(n=26),SSH(n=28),SHH(n=28),和HHH(n=26)。之后,母猪被放置在配备有电子母猪饲养者的集体饲养系统中。在妊娠0天和35天对母猪称重并评估背脂肪厚度和腰肌深度。在分娩时,数据收集了每窝出生的仔猪总数(TB),仔猪出生体重,和仔猪出生体重的变异系数。
■平均而言,母猪在妊娠的前35天增加了22.5±21.6公斤,与背脂增加呈正相关(r=0.954,p=0.006)。HHH组的背脂肪增加高于SSS组(p=0.016)和SSH组(p=0.023),但与SHH组没有差异(p=0.684).受孕率在喂养方式之间没有差异(p>0.05)。HHH组的仔猪个体出生体重高于SSH组(p<0.001)。同样,HHH组出生体重<1000g的仔猪百分比低于SSH组(p<0.001)。然而,仔猪出生体重的变化在各组之间没有差异(p>0.05)。
■在妊娠早期增加一组饲养系统中的初产母猪的饲喂水平可以有效地恢复其身体状况,而不会对随后的产仔产生任何不利影响。
UNASSIGNED: The current study investigated the impacts of different feeding regimes during early
gestation on conception rate, litter traits, piglet birthweight, and litter uniformity in primiparous sows.
UNASSIGNED: In total, 108 primiparous sows were inseminated and assigned to either a standard (1.9±0.5 kg/day, S) or high (2.9±0.8 kg/day, H) feeding levels during the first 35 days of
gestation. The feeding regimes were categorized based on periods of
gestation: 1 to 3, 4 to 15, and 16 to 35 days, resulting in four groups: SSS (n=26), SSH (n=28), SHH (n=28), and HHH (n=26). Afterwards, sows were placed into a group-housed system equipped with electronic sow feeders. The sows were weighed and assessed for backfat thickness and loin muscle depth at 0 and 35 days of
gestation. At farrowing, data were collected on the total number of piglets born per litter (TB), piglet birthweights, and the coefficient of variation of piglet birthweights.
UNASSIGNED: On average, sows gained 22.5±21.6 kg during the first 35 days of
gestation, showing a positive correlation with backfat gain (r=0.954, p=0.006). The backfat gain in the HHH group was higher than in the SSS (p=0.016) and the SSH groups (p=0.023), but did not differ from the SHH group (p=0.684). Conception rates did not show differences among the feeding regimes (p>0.05). Individual piglet birthweights in the HHH group were higher than those in the SSH group (p<0.001). Likewise, the percentage of piglets with birthweights <1000 g in the HHH group was lower than that in the SSH group (p<0.001). However, the variation of piglet birthweight did not differ among the groups (p>0.05).
UNASSIGNED: Increasing feeding levels in primiparous sows in a group-housed system during early pregnancy can effectively restore their body condition without any detrimental effects on subsequent litters.