School of Agriculture and Food Science, University of Queensland, Gatton Campus, QLD 4343, Australia.
Department of Animal Sciences, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran.
Poult Sci. 2019 Dec 1;98(12):6797-6807. doi: 10.3382/ps/pez409.
This study investigated the effects of fermented soybean meal (FSBM) with or without mannan-oligosaccharide (MOS) prebiotic on growth performance, digestive functions, and hepatic IGF-1 gene expression of broiler chicken. A total of 480 day-old male broiler chickens were fed with 4 experimental diets for 6 wk. Experimental diets included corn-soybean meal diet (CON); corn-soybean meal diet + MOS prebiotic [0.2%, ActiveMOS; Biorigin, Brazile]; corn-FSBM diet [soybean meal (SBM) was totally replaced by FSBM]; and corn-FSBM + MOS prebiotic (MIX). Replacing dietary SBM with FSBM with or without MOS improved body weight gain and feed efficiency for the total grow-out period. However, the addition of MOS to the FSBM diet exhibited a greater body weight gain than other experimental diets. Villus height and villus height to crypt depth of the duodenum and jejunum were increased by feeding FSBM, MOS, and MIX diets. The ileal crude protein and energy digestibilities, as well as the activities of intestinal amylase and protease, and pancreatic protease, were improved by replacing SBM with FSBM, with or without MOS. The concentration of plasma 3-methylhistidine was reduced by FSBM and MOS, and synergistically by their combination. The MOS and FSBM diets upregulated the hepatic IGF-1 gene expression. However, there was an evident synergistic effect of FSBM supplemented with MOS in the upregulation of the hepatic IGF-1 gene expression. The outcomes of the current study indicate the FSBM and MOS had the potential to improve growth performance, hepatic IGF-1 expression, and intestinal morphology of broilers. Overall, the fermented products could be considered as functional feed that exhibits probiotic effects and the synergistic effects of prebiotics added to the fermented feeds may further improve the growth performance and gut health and functionality in broiler chicken.
本研究旨在探讨发酵豆粕（FSBM）和/或甘露寡糖（MOS）预混物对肉鸡生长性能、消化功能和肝脏 IGF-1 基因表达的影响。选用 480 只 1 日龄雄性肉鸡，随机分为 4 个处理组，每组 120 只鸡，每个处理组 6 个重复，每个重复 20 只鸡。试验期 6 周。试验采用 4 种日粮，对照组（CON）采用玉米-豆粕型日粮；玉米-豆粕型日粮+0.2% MOS 预混物[ActiveMOS；Biorigin，巴西]；玉米-FSBM 日粮（豆粕全部被 FSBM 替代）；玉米-FSBM+MOS 预混物（MIX）。结果表明，用 FSBM 替代日粮中的豆粕可提高肉鸡的生长性能和饲料效率。与其他试验组相比，添加 MOS 预混物的 FSBM 组可进一步提高肉鸡的生长性能。FSBM、MOS 和 MIX 组可增加肉鸡十二指肠和空肠的绒毛高度和绒毛高度与隐窝深度比值。FSBM 替代豆粕可提高肉鸡回肠粗蛋白和能量消化率，提高肠淀粉酶和蛋白酶及胰腺蛋白酶活性。FSBM 和 MOS 可降低血浆 3-甲基组氨酸浓度，且二者具有协同作用。MOS 和 FSBM 可上调肉鸡肝脏 IGF-1 基因的表达，二者具有协同作用。综上所述，FSBM 和 MOS 可提高肉鸡的生长性能、肝脏 IGF-1 表达和肠道形态，发酵产品可作为具有益生菌作用的功能性饲料。添加 MOS 可能进一步改善肉鸡的生长性能和肠道健康与功能。
