分断断奶改善了母猪在哺乳期交配的怀孕率和胚胎存活率
Alice C Weaver1, Karen L Kind2, Paul J Herde3
1School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy Campus, Roseworthy, SA 5371, Australia.
Animal reproduction science
|March 7, 2024
概括
在哺乳期减少小猪的哺乳负荷,特别是在交配前,可以提高母猪怀孕率和胚胎存活率. 这一策略支持更长的断奶年龄,同时保持群体的繁殖效率.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 猪生产 生产 猪生产
背景情况:
- 延长小猪的断奶年龄对于小猪的生长是可取的,但可能会挑战母猪的繁殖性能.
- 在哺乳期保持母猪的生殖效率需要刺激排卵,而不会影响后续怀孕.
研究的目的:
- 调查小猪哺乳量减少对卵巢卵泡发育和胚胎存活的影响.
- 为了确定在哺乳期前或期间改变哺乳负荷是否会影响母猪的生殖结果.
主要方法:
- 59只母猪被分为三个组:对照组 (11只小猪),分断断奶 (SW;在第18天减少到7只小猪) 和雌性期分断断奶 (OES SW;在雌性期减少到7只小猪).
- 评估了哺乳期雌激发表达,卵巢卵泡发育,怀孕率和胚胎存活率到妊娠的第30天.
主要成果:
- 分断断奶策略没有显著影响哺乳期雌激发表或卵巢卵泡发育.
- 与对照组相比,SW和OES SW治疗都导致更高的怀孕率.
- 与对照 (56.4%) 和OES SW (49.5%) 的母猪相比,分断断奶 (SW) 的母猪表现出明显更高的胚胎存活率 (73.7%).
结论:
- 在哺乳期交配之前,通过断部分 litter 来减少哺乳负担,可以提高母猪的生殖效率.
- 分割断奶策略,在交配前将小猪取出,是改善胚胎存活的最有效方法.
- 这些发现提供了一种实际的方法,可以延长小猪的断奶年龄,同时优化母猪的繁殖性能.
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