Previous studies have shown that supplementing sows with calcium beta-hydroxy-beta-methylbutyrate (CaHMB) or CaHMB plus Vitamin D3 in late gestation and/or lactation improved piglet weight through weaning. This study was conducted at a commercial farrowing operation to confirm previous results, and 52 sows were studied, 26 in each of 2 groups. Sows were randomized to receive either 3 g/d CaHMB plus 500 IU/d Vitamin D3 (HMB/D) or a calcium carbonate containing control top-dressed to the morning ration from day 104 of gestation through weaning. Group 1 consisted of older sows, 4th and 5th parity, while Group 2 sows were younger, 2nd and 3rd parity. Three sows failed to farrow, 1 died after farrowing and 1 farrowed late, therefore forty-seven sows were included in the analysis. Treatment with HMB/D had no effect on sow weights, lactational weight loss, pre- or post-farrowing body condition score, stillborn piglets, mummified piglets, or number of piglets born alive or weaned. In both farrowing groups, birth and 24-hour weights of the piglets from HMB/D-supplemented sows were increased (P < 0.0001). Piglets from sows supplemented with HMB/D were 9.7% heavier at birth and at 24 hours were 9.2% heavier, 1,418.6±21.2 and 1,549.3±22.0 g in Control and HMB/D, respectively. Analysis of birth to weaning dates demonstrated that Control piglets were on average one-half day older than HMB/D piglets at weaning (P < 0.0001). However, adjusting the weaning weights to a standardized 21-d weight (5,205.6±99.5 and 5,423.9±103.5 g for Control and HMB/D piglets, respectively) did not demonstrate statistical significance (P = 0.13). Further analysis by group showed HMB/D tended to increase weaning weights in younger sows (Group 2), 5,073.7±142.7 in Controls, 5,431.7±150.7 g in HMB/D piglets (P < 0.09). In conclusion, our results agree with previous studies demonstrating CaHMB and HMB/D supplementation increased early piglet weights with a tendency to improve weaning weights.

中文翻译：

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PSII-19 向母猪补充 β-羟基-β-甲基丁酸钙 (CAHMB) 和维生素 D3 可增加仔猪体重

以前的研究表明，在妊娠后期和/或哺乳期给母猪补充β-羟基-β-甲基丁酸钙（CaHMB）或CaHMB加维生素D3可以提高断奶仔猪的体重。这项研究是在商业产仔操作中进行的，以确认先前的结果，研究了 52 头母猪，两组各 26 头。从妊娠第 104 天到断奶，母猪随机接受 3 g/d CaHMB 加 500 IU/d 维生素 D3 (HMB/D) 或含碳酸钙的对照，在早上喂食时追肥。第 1 组包括年龄较大的母猪，第 4 胎和第 5 胎，而第 2 组母猪年龄较小，第 2 胎和第 3 胎。3头母猪未产仔，1头产后死亡，1头晚产，因此分析中包括47头母猪。HMB/D 处理对母猪体重没有影响，哺乳期体重减轻、分娩前或分娩后身体状况评分、死产仔猪、木乃伊仔猪或活产或断奶仔猪数量。在两个分娩组中，添加 HMB/D 母猪的仔猪的出生体重和 24 小时体重都有所增加（P < 0.0001）。添加 HMB/D 的母猪的仔猪出生时体重增加 9.7%，24 小时体重增加 9.2%，对照组和 HMB/D 分别为 1,418.6±21.2 和 1,549.3±22.0 g。对出生至断奶日期的分析表明，对照组仔猪在断奶时平均比 HMB/D 仔猪大半天（P < 0.0001）。然而，将断奶体重调整为标准化的 21 天体重（对照组和 HMB/D 仔猪分别为 5,205.6±99.5 和 5,423.9±103.5 g）没有显示出统计学意义（P = 0.13）。按组进行的进一步分析表明，HMB/D 倾向于增加年轻母猪（第 2 组）的断奶体重，对照组为 5,073.7±142.7，HMB/D 仔猪为 5,431.7±150.7 g（P < 0.09）。总之，我们的结果与先前的研究结果一致，表明添加 CaHMB 和 HMB/D 可增加早期仔猪体重，并有改善断奶体重的趋势。