Jiangxi Academy of Agricultural Sciences, Institute of Animal Husbandry and Veterinary Medicine, Nanchang, China.
College of Animal Science and Technology, Hunan agricultural University, Changsha, China.
Anim Sci J. 2021 Jan-Dec;92(1):e13550. doi: 10.1111/asj.13550.
This research aimed to determine whether the astragalus polysaccharide (AP) can improve the production performance and gut microbiota in Chongren hens.120 Chongren hens (240-d old) were randomly allocated into 4 treatments with 30 hens and fed with a control basal diet (CON) or CON supplemented with the different levels of AP (100, 200, and 400 mg/kg) for 56 d. The egg production and feed conversion ratio were decreased (p < .05) with the levels of AP. The yolk weight, yolk color, eggshell thickness, eggshell redness index and egg shell yellowness were increased (p < .05). AP supplementation increased CAT and T-AOC and SOD, and decreased MDA (p < .05). Supplementation of AP decreased IL-2, IL-6 and TNF-α levels (p < .05), but increased the IL-4 level in the liver (p < .05). The villus heights of duodenum, jejunum ileum, the crypt depth and V/C in the jejunum were increased (p < .05). Dietary supplementation of 200 mg/kg AP increased (P relative abundances of Firmicutes and Lactobacteriaceae in the cecum of Chongren hens. In conclusion, addition of AP improved the production performance, egg quality, antioxidant function, and intestinal morphology in hens, which might be associated with the gut microbiota.
本研究旨在探讨黄芪多糖（AP）能否改善崇仁鸡的生产性能和肠道微生物群。将 120 只 240 日龄的崇仁母鸡随机分为 4 组，每组 30 只，分别饲喂基础日粮（CON）或添加不同水平 AP（100、200 和 400mg/kg）的日粮，试验期 56d。随着 AP 水平的增加，产蛋率和饲料转化率降低（p<0.05）。蛋黄重、蛋黄颜色、蛋壳厚度、蛋壳红色指数和蛋壳黄色指数增加（p<0.05）。AP 补充剂增加 CAT 和 T-AOC 以及 SOD，降低 MDA（p<0.05）。AP 补充降低了 IL-2、IL-6 和 TNF-α 水平（p<0.05），但增加了肝脏中 IL-4 水平（p<0.05）。十二指肠、空肠、回肠的绒毛高度和空肠的隐窝深度和 V/C 增加（p<0.05）。AP 日粮添加 200mg/kg 增加了（P<0.05）崇仁母鸡盲肠中厚壁菌门和乳杆菌科的相对丰度。综上所述，AP 的添加提高了母鸡的生产性能、蛋品质、抗氧化功能和肠道形态，这可能与肠道微生物群有关。
