The objective of this study was to determine the effects of soybean bioactive peptides (SBP) supplementation to sows during late gestation and lactation on plasma and milk free amino acid composition and reproductive performance. A total of 86 gestating sows (Landrace × × Yorkshire; mean parity of 2.40 [SD 1.18]) from two successive batches of with a 9-day interval were randomly assigned to either a basal diet group (control diet [Con]) or the Con supplemented with 2% soybean bioactive peptides (SBP) product group from d 90 of gestation to weaning at day 21 of lactation. The duration of farrowing and the interval between piglet births (P < < 0.05) were decreased and the litter weight gain during lactation (P = 0.097) tended to increase of sows fed SBP than Con diet. Serum concentrations of lysine, phenylalanine, valine, arginine (+36–354%, P < < 0.05) and leucine (+30%, P = 0.056), glutamate (+36%, P = 0.057), ornithine (+104%, P = 0.079) at farrowing were increased or tended to increase of sows fed SBP. Serum concentrations of methionine (+29%, P < 0.05), lysine (+72%, P = 0.068), isoleucine (+35%, P = 0.074), arginine (+45%, P = 0.098) and ornithine (+99%, P = 0.085) on postpartum day 21 were increased or tended to increase of sows fed SBP. The concentrations of cystathionine, lysine, arginine, glutamine (+92~351%, P < 0.05), alanine (+191%, P = 0.061) in colostrum and arginine (+41%, P < 0.05) in milk were increased or tended to increase of sows fed SBP. The contents of IgG and fat in colostrum (P < 0.05) of sows fed SBP were increased compared with that in Con sows. Serum malondialdehyde concentrations of sows at parturition and at d 14 of lactation were both markedly (P < 0.05) decreased and the activity of total antioxidant capacity in serum of sows at parturition (P < 0.05) was significantly increased with SBP supplementation. In conclusion, the present research indicated that dietary supplementation with soybean bioactive peptides during late gestation and lactation could shorten the duration of farrowing and enhance the growth performance of suckling piglets by improving functional amino acids concentration and antioxidant properties.

这项研究的目的是确定在妊娠后期和哺乳期向母猪补充大豆生物活性肽（SBP）对血浆和牛奶中游离氨基酸的组成及繁殖性能的影响。连续9天间隔的两个连续批次的总共86头妊娠母猪（Landrace××Yorkshire；平均胎次2.40 [SD 1.18]）被随机分配到基础饮食组（对照饮食[Con]）或基础饮食组。从妊娠90天到哺乳第21天断奶，补充2％大豆生物活性肽（SBP）产品组的Con。产仔持续时间和仔猪出生间隔（P  <<0.05）减少，泌乳期产仔体重增加（P = 0.097）饲喂SBP的母猪倾向于比Con饲粮增加。血清赖氨酸，苯丙氨酸，缬氨酸，精氨酸（+ 36–354％，P  <<0.05）和亮氨酸（+ 30％，P  = 0.056），谷氨酸（+ 36％，P  = 0.057），鸟氨酸（+ 104％） ，P  = 0.079）分娩时母猪饲喂SBP会增加或趋于增加。血清蛋氨酸（+ 29％，P  <0.05），赖氨酸（+ 72％，P  = 0.068），异亮氨酸（+ 35％，P  = 0.074），精氨酸（+ 45％，P  = 0.098）和鸟氨酸（+ 99％，磷 = 0.085）在产后第21天喂SBP的母猪增加或趋于增加。 牛初乳中的胱硫醚，赖氨酸，精氨酸，谷氨酰胺（+ 92〜351％，P  <0.05），丙氨酸（+ 191％，P = 0.061）和 牛奶中精氨酸（+ 41％，P <0.05）的浓度升高或升高饲喂SBP的母猪倾向于增加。 饲喂SBP的母猪的初乳中IgG和脂肪含量（P <0.05）与Con母猪相比有所增加。母猪产后和哺乳第14天的血清丙二醛浓度均显着 降低（P <0.05），母猪血清中总抗氧化能力活性（P 补充SBP显着增加<0.05）。总之，本研究表明，在妊娠后期和哺乳期日粮中添加大豆生物活性肽可以通过改善功能性氨基酸浓度和抗氧化特性，缩短产仔时间并提高乳猪的生长性能。