Gourley K M, Nichols G E, Sonderman J A, Spencer Z T, Woodworth J C, Tokach M D, DeRouchey J M, Dritz S S, Goodband R D, Kitt S J, Stephenson E W
Department of Animal Sciences and Industry, College of Agriculture, Kansas State University, Manhattan, 66506.
Pillen Family Farms, Columbus, NE 68601.
Transl Anim Sci. 2017 Dec 1;1(4):426-436. doi: 10.2527/tas2017.0043. eCollection 2017 Dec.
Two experiments were conducted to evaluate the effects of increasing dietary SID Lys in lactation on sow and litter performance. In Exp. 1, a total of 111 primiparous sows (Line 241; DNA Genetics, Columbus, NE) were allotted to 1 of 4 dietary treatments on d 110 of gestation. Dietary treatments included increasing dietary standardized ileal digestible (SID) Lys (0.80, 0.95, 1.10, and 1.25%). During lactation, there were no differences in ADFI or sow BW at weaning (d 21), resulting in no differences in BW loss. However, backfat loss during lactation decreased (linear, = 0.046) as SID Lys increased. There were no differences in litter weaning weight, litter gain from d 2 to weaning, percentage of females bred by d 7 after weaning, d 30 conception rate, farrowing rate or subsequent litter characteristics. In Exp. 2, a total of 710 mixed parity sows (Line 241; DNA Genetics) were allotted to 1 of 4 dietary treatments at d 112 of gestation. Dietary treatments included increasing SID Lys (0.75, 0.90, 1.05, and 1.20%). Sow BW at weaning increased (quadratic, = 0.046), and sow BW loss from post-farrow to weaning or d 112 to weaning decreased (quadratic, ≤ 0.01) as SID Lys increased. Sow backfat loss increased (linear, = 0.028) as SID Lys increased. Conversely, longissimus muscle depth loss decreased (linear, = 0.002) as SID Lys increased. Percentage of females bred by d 7 after weaning increased (linear, = 0.047) as SID Lys increased in parity 1 sows, with no difference in parity 2 or 3+ sows. Litter weight at d 17 and litter gain from d 2 to 17 increased (quadratic, = 0.01) up to 1.05% SID Lys with no improvement thereafter. For subsequent litter characteristics, there were no differences in total born, percentage born alive, stillborn, or mummies. In conclusion, our results suggest that increasing dietary SID Lys can reduce sow protein loss in lactation. The optimal level of dietary SID Lys required by the sow may vary based on response criteria and parity.
进行了两项试验以评估泌乳期提高日粮标准回肠可消化赖氨酸（SID Lys）对母猪和仔猪生产性能的影响。在试验1中，总共111头初产母猪（241品系；DNA Genetics，哥伦布，内布拉斯加州）在妊娠第110天被分配到4种日粮处理中的一种。日粮处理包括提高日粮标准回肠可消化赖氨酸水平（0.80%、0.95%、1.10%和1.25%）。在泌乳期，平均日采食量（ADFI）或断奶时（第21天）母猪体重没有差异，导致体重损失也没有差异。然而，随着SID Lys增加，泌乳期背膘损失减少（线性，P = 0.046）。断奶仔猪体重、第2天至断奶的仔猪增重、断奶后第7天配种的母猪比例、第30天受胎率、产仔率或后续窝产特性均无差异。在试验2中，总共710头不同胎次的母猪（241品系；DNA Genetics）在妊娠第112天被分配到4种日粮处理中的一种。日粮处理包括提高SID Lys（0.75%、0.90%、1.05%和1.20%）。随着SID Lys增加，断奶时母猪体重增加（二次曲线，P = 0.046），从分娩后到断奶或从妊娠第112天到断奶的母猪体重损失减少（二次曲线，P≤0.01）。随着SID Lys增加，母猪背膘损失增加（线性，P = 0.028）。相反，随着SID Lys增加，背最长肌深度损失减少（线性，P = 0.002）。在第1胎母猪中，随着SID Lys增加，断奶后第7天配种的母猪比例增加（线性，P = 0.047），在第2胎或第3胎及以上母猪中无差异。在SID Lys达到并包括1.05%时，第17天窝重和第2天至第17天的窝增重增加（二次曲线，P = 0.01），此后无改善。对于后续窝产特性，总产仔数、活产仔数比例、死胎或木乃伊胎均无差异。总之，我们的结果表明，提高日粮SID Lys可以减少泌乳期母猪的蛋白质损失。母猪所需的日粮SID Lys最佳水平可能因反应标准和胎次而异。
