ABSTRACT This study evaluated the effects of different amounts (0, 2.5, 5, 10 g/kg) of dietary yeast extract (YE, including 102 g/kg nucleotides) on the milk composition, oxidative stress status, and performance of sows and their offspring. A total of 80 multiparous Large White sows (2-3 of parity) were allotted to 1 of the 4 dietary treatments (0, 2.5, 5, 10 g/kg YE, with 0 g/kg YE used as control (CON)) based on body weight at day 85 of gestation (n=20 per treatment), and the experiment lasted from day 85 of gestation to day 21 of lactation. The reproductive performance of sows and growth performance of piglets were measured. Blood samples were collected from sows and weaning piglets for measuring the level of oxidative stress parameters. The general composition and nucleotide concentrations of colostrum and milk were also measured. Results indicated that, with increasing YE amount in the diet, sows had a linear increase (P ≤ 0.05) in average daily feed intake (ADFI) during the first week of lactation, while a linear decrease (P ≤ 0.01) in body weight loss during lactation. Additionally, the 10 g/kg YE treatment tended to increase the number of weaned piglets per litter (P = 0.08). Furthermore, with increasing YE, the milk exhibited a linear increase (P

中文翻译：

---

日粮添加不同量酵母提取物对母猪氧化应激、乳成分和生产性能的影响

摘要 本研究评估了不同量（0、2.5、5、10 g/kg）的日粮酵母提取物（YE，包括 102 g/kg 核苷酸）对母猪及其生产性能的牛奶成分、氧化应激状态和生产性能的影响。后代。将总共​​ 80 头经产大白母猪（胎次的 2-3 头）分配到 4 种日粮处理中的一种（0、2.5、5、10 g/kg YE，0 g/kg YE 作为对照 (CON)）基于妊娠第 85 天的体重（每个处理 n=20），实验从妊娠第 85 天持续到泌乳第 21 天。测定母猪的繁殖性能和仔猪的生长性能。从母猪和断奶仔猪收集血样用于测量氧化应激参数的水平。还测量了初乳和牛奶的一般成分和核苷酸浓度。结果表明，随着日粮中 YE 用量的增加，母猪在泌乳第一周的平均日采食量 (ADFI) 呈线性增加 (P ≤ 0.05)，而体重减轻则呈线性下降 (P ≤ 0.01)哺乳期间。此外，10 g/kg YE 处理倾向于增加每窝断奶仔猪的数量（P = 0.08）。此外，随着 YE 的增加，牛奶表现出线性增加（P