Relationship of gestation protein and feed intake level over a five-parity period using a high-producing sow genotype.
Relationship of gestation protein and feed intake level over a five-parity period using a high-producing sow genotype.
复制标题
使用高产母猪基因型在五胎期内妊娠蛋白与采食量水平的关系。
DOI：
10.2527/1998.762533x
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发表时间：
1998
影响因子：
3.3
通讯作者：
D. Mahan
中科院分区：
文献类型：
--
作者：
D. Mahan
使用涉及 198 头产仔的高产长白大白杂交后备母猪 (n = 50) 来评估日粮妊娠蛋白（13% vs 16% CP）和妊娠饲料摄入量（对照 vs 高），以及它们在五胎期内对母猪繁殖性能的相互作用。在第 1 胎期间，对照的妊娠采食量为 1.81 kg/d，随后每胎增加 0.09 kg。每个胎次的 High 日采食量增加 0.13 kg，即大约 450 kcal ME。该实验采用 2 x 2 的随机完整区组设计，分两次重复进行，并在母猪组内进行奇偶数嵌套。在不同的时间间隔测定母猪体重和背膘厚度。从产仔到断奶（21 天），所有母猪都饲喂第 1 胎含 0.90% 赖氨酸、第 2 至 5 胎含 0.80% 赖氨酸的哺乳期日粮。在每次哺乳期间收集母猪和猪的体重、采食量以及初乳和 21 天牛奶样品。高采食量和 13% 蛋白质日粮导致背膘厚度更大 (P < .01)，且效果是相加的。背膘厚度随胎次以及从妊娠后期到下胎次的再繁殖期呈二次方下降（P < .01）。高采食量导致窝产仔数增加 (P < .01)，而日粮妊娠蛋白浓度对分娩性能没有影响。当饲喂 16% 妊娠蛋白时，每胎次的母猪在产后 0 至 7 天以及整个 21 天泌乳期 (P < .01) 消耗更多饲料 (P < .01)。妊娠期采食量不影响哺乳期采食量。妊娠变量均不影响初乳或 21 天乳脂，但在第 2 次产次后，所有组中的浓度均下降 (P < .01)。与其他母猪处理组相比，当妊娠母猪饲喂 16% 蛋白质和高采食量组合时，第 1 次产仔数在 14 和 21 天时较重，0 至 14 和 0 至 21 天的窝增重更大。从第 2 胎到第 5 胎，所有治疗组的窝重和增重均相似。这导致了这些变量的三向交互响应 (P < .05)。这些结果表明，初产母猪需要比一般建议更高的妊娠蛋白浓度和采食量，但高采食量下的 13% CP 日粮对老年母猪有效。
High-producing Landrace-Large White crossbred gilts (n = 50) involving 198 farrowings were used to evaluate dietary gestation protein (13 vs 16% CP) and gestation feed intakes (Control vs High), and their interaction, over a five-parity period on sow reproductive performance. Gestation feed intake for Control was 1.81 kg/d during parity 1, increasing by .09 kg for each successive parity. The daily feed intake for High was greater by .13 kg or approximately 450 kcal ME at each respective parity. The experiment was a 2 x 2 in a randomized complete block design conducted in two replicates with parity nested within sow groups. Sow weights and backfat thickness were determined at various intervals. A lactation diet containing .90% lysine in parity 1 and .80% lysine during parities 2 to 5 was fed to all sows from farrowing to weaning (21 d). Sow and pig weights, feed intakes, and colostrum and 21-d milk samples were collected during each lactation. The High feed intake and the 13% protein diet resulted in greater (P < .01) backfat thicknesses, and the effects were additive. Backfat thickness declined quadratically (P < .01) by parity and from late gestation to the rebreeding period of the following parity. The High feed intake resulted in a larger litter size (P < .01), whereas dietary gestation protein concentration had no effect on parturition performance. Sows in each parity consumed more (P < .01) feed from 0 to 7 d postpartum and for the overall 21-d lactation period (P < .01) for parity 1 when the 16% gestation protein had been fed. Gestation feed intake regimens did not affect lactation feed intake. Neither gestation variable affected colostrum or 21-d milk fat, but concentrations declined (P < .01) in all groups after parity 2. Parity 1 litters were heavier at 14 and 21 d, with larger litter gains from 0 to 14 and 0 to 21 d when gestating sows had been fed the 16% protein and the High feed intake combination compared to the other sow treatment groups. From parity 2 to 5, litter weights and gains were similar for all treatment groups. This resulted in a three-way interaction response (P < .05) for these variables. These results suggest that primiparous sows required a greater gestation protein concentration and greater feed intake than generally recommended, but the 13% CP diet at the High feed intake was effective in older sows.