ABSTRACT This study aimed to evaluate the effects of adding dried distillers’ grains with solubles (DDGS) to the nutritional regimens of ewes at different time periods on reproductive traits, serum hormones and serum metabolites. In Experiment 1, 100 ewes were divided into 4 groups (n = 25) according to diet. The four diets were grass hay (H) alone (group H), H with barley (group H + B), H with DDGS for the whole feeding period (27 d) (group H + DDGS) or H and DDGS for 5 d (d 8–12 of oestrus cycle) (group H + DDGS5). Serum progesterone concentrations were affected by oestrus cycle (p < 0.001), but not by dietary treatments. However, feeding H + DDGS caused significant increases in serum insulin, leptin and growth hormone concentrations (p < 0.05). In Experiment 2, 30 ewes were divided into 2 groups (n = 15), receiving DDGS or soybean meal (SBM) during the prepartum period. Diets had no significant effect on weights of dams or lambs at birth; however, the weaning weights of lambs born from ewes of group DDGS were significantly higher (p < 0.05). Moreover, serum glucose, blood urea nitrogen, triglyceride and beta hydroxybutyric acid (BHBA) concentrations during the prepartum period were affected by dietary treatments and by time (p < 0.001). During the prepartum period, BHBA concentrations of ewes fed SBM were higher, while BHBA levels decreased during the last weeks of pregnancy regardless of diet. Lamb serum immunoglobulin G concentrations increased from 1 h to 24 h after birth (p < 0.001). Colostrum of ewes fed SBM had higher fat-free dry matter (DM) and protein contents in comparison to colostrum of ewes fed DDGS (p < 0.05). In conclusion, DDGS can be included as protein source in pregnancy rations up to 15% of DM to obtain reproductive performance outcomes equal to or exceeding those obtained with SBM.

中文翻译：

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干玉米酒糟加可溶物和豆粕补充剂对母羊生理指标和繁殖性能的影响


摘要：本研究旨在评价不同时期母羊营养方案中添加干酒糟（DDGS）对生殖性状、血清激素和血清代谢物的影响。实验1中，100只母羊根据饮食分为4组（n = 25）。四种日粮分别为仅草干草 (H)（H 组）、H 加大麦（H + B 组）、H 加 DDGS 整个饲喂期（27 天）（H + DDGS 组）或 H 和 DDGS 5 天（发情周期第 8-12 天）（H 组 + DDGS5）。血清孕酮浓度受发情周期影响（p < 0.001），但不受饮食治疗影响。然而，饲喂 H + DDGS 导致血清胰岛素、瘦素和生长激素浓度显着增加 (p < 0.05)。在实验2中，30只母羊被分成2组（n = 15），在产前阶段接受DDGS或豆粕（SBM）。饮食对母羊或羔羊的出生体重没有显着影响；然而，DDGS 组母羊所生羔羊的断奶重量显着更高（p < 0.05）。此外，产前期间的血清葡萄糖、血尿素氮、甘油三酯和β羟基丁酸（BHBA）浓度受到饮食治疗和时间的影响（p < 0.001）。在产前期间，饲喂 SBM 的母羊的 BHBA 浓度较高，而无论饮食如何，在妊娠最后几周，BHBA 水平都会下降。羔羊血清免疫球蛋白 G 浓度从出生后 1 小时至 24 小时增加 (p < 0.001)。与饲喂 DDGS 的母羊初乳相比，饲喂 SBM 的母羊初乳具有更高的无脂干物质 (DM) 和蛋白质含量 (p < 0.05)。 总之，DDGS 可以作为妊娠日粮中的蛋白质来源，含量高达 DM 的 15%，以获得等于或超过 SBM 所获得的生殖性能结果。