The objective was to evaluate increasing standard ileal digestible (SID) lysine (Lys) and metabolizable energy (ME) above recommended inclusion levels fed to young (parity 1-2) and mature (parity 3-5) lactating sows. A total of 741 sows (371 parity 1-2, 370 parity 3-5) were fed in a 2×2 factorial arrangement of treatments in a randomized complete block design. Factors included SID Lys (0.85% vs 1.11%) and ME (3.18 Mcal/kg vs 3.33 Mcal/kg). Diets were formulated to deliver 62 g of SID Lys at 0.85% inclusion and 23.2 Mcal of energy to sows that consume 7.30 kg of complete feed per day. Overall, sows consumed 61 g/d SID Lys and 22.6 Mcal/kg, but because of nutrient intake differences between young and mature sows, outcome variables were analyzed separately and not statistically compared. There were no differences for either SID Lysine or ME treatment in lactation feed intake (P ≥ 0.27) or change in body weight (P ≥ 0.19) for young sows. Young sows fed 3.33 Mcal/kg ME had 0.31 fewer post-cross foster mortalities (P < 0.01) resulting in weaned litters that were 4.06 kg heavier (P < 0.01) than litters from young sows fed 3.18 Mcal/kg ME. Young sows fed 1.11% SID Lys and 3.33 Mcal/kg ME had the fewest (P ≤ 0.03) sows bred by d 7 compared to all other treatments. There was an interaction (P = 0.03) for wean-to-estrus-interval for young sows were young sows fed 1.11% SID Lys and 3.33 Mcal/kg ME were at least 3.27 days longer than young sows fed 0.85% SID Lys and 3.33 Mcal/kg ME or 1.11% SID Lys and 3.18 Mcal/kg ME. Young sows fed 3.33 Mcal/kg ME had a nearly 7% improvement in lactation G:F (0.40 vs 0.43; P < 0.01) compared to young sows fed 3.18 Mcal/kg ME. The percentage of mature sows fed 1.11% SID Lys bred by day 7 was 7.0 percentage units less (P = 0.06) when fed 3.33 Mcal/kg ME compared to 3.18 Mcal/kg ME. Feed efficiency of mature sows fed 1.11% SID Lys (0.38) was 7.89% greater (P < 0.01) than mature sows fed 0.85% SID Lys (0.35). Increasing either SID Lys or ME energy to young and mature sows had little influence on sow or pig performance, but simultaneously increasing both SID Lys and metabolizable energy negatively impacted subsequent breeding performance.

中文翻译：

---

提高年轻和成熟母猪哺乳日粮中 SID 赖氨酸和可代谢能量水平的影响


目的是评估饲喂年轻 （胎次 1-2） 和成熟 （胎次 3-5） 泌乳母猪的标准回肠可消化 （SID） 赖氨酸 （Lys） 和代谢能量 （ME） 高于推荐水平的含量。共有 741 头母猪（371 头 1-2 胎，370 头 3-5 胎）以 2×2 析因处理方式饲喂，采用随机完全区组设计。因素包括 SID Lys （0.85% 对 1.11%） 和 ME （3.18 Mcal/kg 对 3.33 Mcal/kg）。日粮配方为每天消耗 7.30 公斤全饲料的母猪提供 62 克 SID Lys（添加量为 0.85%）和 23.2 Mcal 能量。总体而言，母猪消耗 61 g/d SID Lys 和 22.6 Mcal/kg，但由于年轻母猪和成熟母猪之间的营养摄入差异，结果变量被单独分析，而不是统计比较。SID 赖氨酸或 ME 处理在年轻母猪的泌乳采食量 （P ≥ 0.27） 或体重变化 （P ≥ 0.19） 方面没有差异。饲喂 3.33 Mcal/kg ME 的幼母猪杂交寄养后死亡率减少 0.31 （P < 0.01），导致断奶窝产仔猪比饲喂 3.18 Mcal/kg ME 的幼母猪重 4.06 kg （P < 0.01）。与所有其他处理相比，饲喂 1.11% SID Lys 和 3.33 Mcal/kg ME 的年轻母猪第 7 天繁殖的母猪最少 （P ≤ 0.03）。年轻母猪的断奶至发情间隔存在交互作用 （P = 0.03），饲喂 1.11% SID Lys 和 3.33 Mcal/kg ME 的年轻母猪比饲喂 0.85% SID Lys 和 3.33 Mcal/kg ME 或 1.11% SID Lys 和 3.18 Mcal/kg ME 的年轻母猪至少长 3.27 天。饲喂 3.33 Mcal/kg ME 的年轻母猪的泌乳量 G：F 改善了近 7%（0.40 对 0.43;P < 0.01） 与饲喂 3.18 Mcal/kg ME 的年轻母猪相比。饲喂 3 时，第 7 天饲喂 1.11% SID Lys 的成熟母猪百分比在饲喂 3 时减少了 7.0 个百分单位 （P = 0.06）。33 Mcal/kg ME 与 3.18 Mcal/kg ME 相比。饲喂 1.11% SID Lys （0.38） 的成熟母猪的饲料效率比饲喂 0.85% SID Lys 的成熟母猪 （0.35） 高 7.89% （P < 0.01）。增加年轻和成熟母猪的 SID Lys 或 ME 能量对母猪或猪的生产性能影响不大，但同时增加 SID Lys 和代谢能量对随后的育种性能产生负面影响。