Mateo R D, Wu G, Moon H K, Carroll J A, Kim S W
Department of Animal and Food Sciences, Texas Tech University, Lubbock 79409, USA.
J Anim Sci. 2008 Apr;86(4):827-35. doi: 10.2527/jas.2007-0371. Epub 2007 Dec 21.
A 2 x 2 factorial arrangement of treatments in a randomized block design was used to determine the effects of dietary Arg supplementation during gestation and lactation on the lactation performance of 38 first-parity sows. At 30 d of gestation, pregnant gilts were allotted based on BW to 1 of 2 diets supplemented with 1% L-Arg.HCl or 1.7% L-Ala (isonitrogenous control). After farrowing, sows were further allotted based on BW within previous gestation treatment groups to 1 of 2 lactation diets supplemented with 1% L-Arg.HCl or 1.7% L-Ala (isonitrogenous control). All gestation diets contained 3.1 Mcal/kg and 12.2% CP (as is) and were fed 2 kg/d in 2 equally sized meals, whereas all lactation diets contained 3.2 Mcal/kg and 18.6% CP (as is) and were fed ad libitum. Litter size was standardized to 10 piglets by cross-fostering within 24 h postfarrowing. On a weekly basis, BW and backfat (BF) thickness of sows, as well as piglet BW were measured, and blood and milk samples were obtained from the sows. Number of days from weaning to estrus and ADFI were also recorded. There were no differences in BW, BF thickness, ADFI, or days until return to estrus among treatment groups. There was no effect of the gestation diet or a gestation x lactation diet interaction on any parameter measured. On d 7 of lactation, plasma concentrations of Arg and insulin in sows, as well as concentrations of most AA in milk, were greater (P < 0.05) in response to Arg supplementation during lactation compared with the control. Weight gain of piglets from sows fed the Arg-supplemented diet during lactation was greater between d 0 and 7 (P < 0.01) and between d 0 and 21 (P < 0.05) of lactation compared with piglets from sows fed the control diet. Collectively, results from this study indicate the potential beneficial effects of dietary Arg supplementation in improving the lactation performance of first-parity sows.
在随机区组设计中采用2×2析因处理安排，以确定妊娠期和哺乳期日粮添加精氨酸（Arg）对38头初产母猪泌乳性能的影响。妊娠30天时，根据体重将妊娠后备母猪分配到两种日粮中的一种，日粮分别添加1%的L-精氨酸盐酸盐或1.7%的L-丙氨酸（等氮对照）。分娩后，在先前妊娠处理组内再根据体重将母猪进一步分配到两种泌乳日粮中的一种，日粮分别添加1%的L-精氨酸盐酸盐或1.7%的L-丙氨酸（等氮对照）。所有妊娠日粮含3.1兆卡/千克和12.2%的粗蛋白（原样），分两顿等量饲喂，每顿2千克/天；而所有泌乳日粮含3.2兆卡/千克和18.6%的粗蛋白（原样），自由采食。分娩后24小时内通过交叉寄养将仔猪数量标准化为10头。每周测量母猪的体重和背膘厚度以及仔猪体重，并采集母猪的血液和乳汁样本。还记录断奶至发情的天数和平均日采食量。各处理组之间在体重、背膘厚度、平均日采食量或发情恢复天数方面没有差异。妊娠日粮或妊娠×泌乳日粮的交互作用对所测任何参数均无影响。与对照组相比，泌乳期添加Arg后，泌乳第7天母猪血浆中Arg和胰岛素浓度以及乳汁中大多数氨基酸的浓度更高（P<0.05）。与饲喂对照日粮的母猪所产仔猪相比，泌乳期饲喂添加Arg日粮的母猪所产仔猪在泌乳第0至7天（P<0.01）和第0至21天（P<0.05）体重增加更多。总体而言，本研究结果表明日粮添加Arg对改善初产母猪泌乳性能具有潜在的有益作用。
