Precision feeding (PF) aims to provide the right amount of nutrients at the right time for each animal. Lactating sows generally receive the same diet, which either results in insufficient supply and body reserve mobilization, or excessive supply and high nutrient excretion. With the help of online measuring devices, computational methods, and smart feeders, we introduced the first PF decision support system (DSS) for lactating sows. Precision (PRE) and conventional (STD) feeding strategies were compared in commercial conditions. Every day each PRE sow received a tailored ration that had been computed by the DSS. This ration was obtained by blending a diet with a high AA and mineral content (13.00 g/kg SID Lys, 4.50 g/kg digestible P) and a diet low in AAs and minerals (6.50 g/kg SID Lys, 2.90 g/kg digestible P). All STD sows received a conventional diet (10.08 g/kg SID Lys, 3.78 g/kg digestible P). Before the trial, the DSS was fitted to farm performance for the prediction of piglet average daily gain (PADG) and sow daily feed intake (DFI), with data from 1,691 and 3,712 lactations, respectively. Sow and litter performance were analyzed for the effect of feeding strategy with ANOVA, with results considered statistically significant when P<0.05. The experiment involved 239 PRE and 240 STD sows. DFI was similarly high in both treatments (PRE: 6.59, STD: 6.45 kg/d; P=0.11). Litter growth was high (PRE: 2.96, STD: 3.06 kg/d), although it decreased slightly by about 3% in PRE compared to STD treatments (P<0.05). Sow body weight loss was low, although it was slightly higher in PRE sows (7.7 versus 2.1 kg, P<0.001), which might be due to insufficient AA supply in some sows. Weaning to estrus interval (5.6 d) did not differ. In PRE sows SID Lys intake (PRE: 7.7, STD: 10.0 g/kg; P<0.001) and digestible P intake (PRE: 3.2, STD: 3.8 g/kg; P<0.001) declined by 23% and 14%, respectively, and feed cost decreased by 12%. For PRE sows, excretion of N and P decreased by 28% and 42%, respectively. According to these results, PF appears to be a very promising strategy for lactating sows.

中文翻译：

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泌乳母猪的精准饲喂：农场条件下决策支持系统的实施和评估


精准饲喂（PF）旨在在正确的时间为每只动物提供正确数量的营养。哺乳期母猪普遍接受相同的日粮，这要么导致供给不足、身体储备动员不足，要么导致供给过多、营养物质排泄过高。借助在线测量设备、计算方法和智能饲喂器，我们推出了第一个用于泌乳母猪的 PF 决策支持系统 (DSS)。在商业条件下比较精准（PRE）和传统（STD）饲喂策略。每头 PRE 母猪每天都会收到 DSS 计算出的定制日粮。该日粮是通过混合高 AA 和矿物质含量的日粮（13.00 g/kg SID Lys、4.50 g/kg 可消化磷）和低 AA 和矿物质含量的日粮（6.50 g/kg SID Lys、2.90 g/kg）获得的。易消化P）。所有 STD 母猪均接受常规日粮（10.08 g/kg SID Lys，3.78 g/kg 可消化磷）。在试验之前，DSS 已根据猪场性能进行拟合，以预测仔猪平均日增重 (PADG) 和母猪日采食量 (DFI)，数据分别来自 1,691 次和 3,712 次哺乳期。使用方差分析分析了母猪和窝产仔生产性能的饲喂策略的影响，当 P<0.05 时，结果被认为具有统计学显着性。该实验涉及 239 头 PRE 和 240 头 STD 母猪。两种处理的 DFI 相似（PRE：6.59，STD：6.45 kg/d；P=0.11）。窝生长量较高（PRE：2.96，STD：3.06 kg/d），尽管与 STD 处理相比，PRE 中的窝生长略有下降约 3%（P<0.05）。母猪体重损失较低，但 PRE 母猪体重损失略高（7.7 公斤与 2.1 公斤，P<0.001），这可能是由于某些母猪 AA 供应不足所致。断奶到发情间隔（5.6天）没有差异。 PRE 母猪 SID 赖氨酸摄入量（PRE：7.7，STD：10。0克/公斤； P<0.001) 和可消化磷摄入量 (PRE: 3.2, STD: 3.8 g/kg; P<0.001) 分别下降 23% 和 14%，饲料成本下降 12%。对于 PRE 母猪，N 和 P 的排泄量分别减少了 28% 和 42%。根据这些结果，PF 对于泌乳母猪来说似乎是一种非常有前途的策略。