Nursery pigs are frequently faced with disease challenges and producers are seeking nutritional strategies to help pig performance and health. Therefore, our objective was to evaluate five dietary formulation strategies that may improve performance in poor health nursery flow pigs (confirmed Rotavirus A and hemolytic E. coli positive at d 14). A total of 431 weaned pigs (5.5 ± 1.25 kg BW) were assigned to pens (10–11 pigs/pen) and one of five diets (n = 8 pens/treatment) over a 63-day test period consisting of 4 diet phases using a complete randomized design. In phase 1 and 2, treatments were: 1) 15–25% low soybean meal (LSBM), 2) 35–45% high soybean meal (HSBM), 3) 130% increase in valine and isoleucine branched-chain amino acids (BCAA) to Lys, 4) 2.1% combination of C8, C10 and C12 medium chain fatty acids (MCFA), and 5) 20% modified oats (MO). All pigs were fed a common diet for phases 3 and 4. Within phase, all diets were isocaloric with similar SID Lys:ME. Pen was considered the experimental unit and data were analyzed with contrast statements comparing each diet against the LSBM control. Across all phases, compared to LSBM, HSBM, BCAA and MO did not alter ADG, ADFI and G:F (P > 0.10). However, MCFA reduced (P < 0.05) ADG in phase 1 (0.20 vs 0.16 kg) and 2 (0.45 vs 0.39 kg) and phase 2 ADFI (0.66 kg vs 0.58 kg) compared to the LSBM treatment. Overall (0–63 days), compared to the LSMB, the MCFA treatment reduced ADG (0.46 vs 0.42 kg, P = 0.004) and ADFI (0.75 vs 0.68 kg, P = 0.009). Diet did not affect mortality. These data report that MCFA attenuated nursery pig performance, while HSBM, MO and BCAA diets fed in phases 1 and 2 had no longitudinal impact on pig performance or health.

中文翻译：

---

270 评估营养策略以提高健康状况不佳的保育猪的性能

保育猪经常面临疾病挑战，生产者正在寻求营养策略来帮助猪的表现和健康。因此，我们的目标是评估五种日粮配方策略，这些策略可能会改善健康状况不佳的保育流猪的生产性能（确认轮状病毒 A 和溶血性大肠杆菌在第 14 天呈阳性）。在由 4 个饮食阶段组成的 63 天测试期内，共有 431 头断奶仔猪（5.5 ± 1.25 kg BW）被分配到围栏（10-11 头猪/围栏）和五种日粮之一（n = 8 围栏/治疗）使用完全随机设计。在第 1 阶段和第 2 阶段，处理是：1) 15-25% 低豆粕 (LSBM)，2) 35-45% 高豆粕 (HSBM)，3) 缬氨酸和异亮氨酸支链氨基酸增加 130% ( BCAA) 至 Lys，4) C8、C10 和 C12 中链脂肪酸 (MCFA) 的 2.1% 组合，以及 5) 20% 改性燕麦 (MO)。在第 3 阶段和第 4 阶段，所有猪都喂食相同的日粮。在该阶段内，所有日粮都是等热量的，具有相似的 SID Lys:ME。Pen 被认为是实验单元，并使用对比语句分析数据，将每种饮食与 LSBM 对照进行比较。在所有阶段，与 LSBM 相比，HSBM、BCAA 和 MO 没有改变 ADG、ADFI 和 G:F (P > 0.10)。然而，与 LSBM 处理相比，MCFA 在第 1 阶段（0.20 对 0.16 kg）和第 2 阶段（0.45 对 0.39 kg）和第 2 阶段 ADFI（0.66 kg 对 0.58 kg）降低了（P < 0.05）ADG。总体而言（0-63 天），与 LSMB 相比，MCFA 处理降低了 ADG（0.46 对 0.42 kg，P = 0.004）和 ADFI（0.75 对 0.68 kg，P = 0.009）。饮食不影响死亡率。这些数据表明 MCFA 降低了保育猪的性能，而 HSBM、