中文摘要：本研究旨在探索日粮中添加水飞蓟素对摄入了混合黄曲霉毒素的肉鸡性能、空肠形态和回肠菌群的影响。结果发现日粮添加水飞蓟素后通过抑制回肠细菌，改善摄入黄曲霉毒素的肉鸡的性能，并提高吸收表面积。
外文摘要：This study was conducted to investigate the effect of dietary supplementation of silymarin on performance, jejunal morphology and ileal bacterial population in broiler chicks intoxicated with a mix of aflatoxins. A total of three hundred thirty six 7-day-old Ross broiler chicks were randomly distributed between seven experimental groups with four replicates of 12 birds each. Experimental treatments consisted of a control group (unchallenged), and a 2x3 factorial arrangement, including two aflatoxin levels (0.5 and 2ppm) and three levels of silymarin (0, 500 and 1000ppm). Birds were challenged with a mix of aflatoxins from 7 to 28days of age. Results showed that increasing aflatoxin level resulted in decreased average daily feed intake (ADFI) and weight gain (ADWG), consequently impaired feed conversion ratio (FCR) throughout the trial period. Dietary supplementation of silymarin resulted in the marked increases in ADFI and ADWG, and improved FCR values in aflatoxin-challenged chicks. Ileal bacterial populations at days 28 and 42 of age were increased by incremental levels of aflatoxins. On the other hand, dietary silymarin supplementation suppressed ileal populations of Escherichia coli, Salmonella, Klebsiella and total negative bacteria in aflatoxicated birds. Increase in dietary aflatoxin level resulted in the decreased villi height, villi height-to-crypt depth ratio (VH:CD), villi surface area and apparent villi absorptive area, while it increased crypt depth, goblet cell count and lymphoid follicular diameter. Feeding silymarin at the level of 1000ppm increased villi height and VH:CD in aflatoxicated birds. Present results indicate that dietary inclusion of silymarin could improve performance by suppressing ileal bacteria and enhancing absorptive surface area in aflatoxin-challenged broiler chicks.
外文关键词：broiler chicks；silymarin；aflatoxin challenge；performance； jejunal morphology；ileal microbial count
作者：Jahanian, E；Mahdavi, AH；Asgary, S；Jahanian, R；AF Jahanian, E.；Mahdavi, A. H.；Asgary, S.；Jahanian, R.
作者单位：Isfahan Univ Technol
期刊名称：JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION
期刊影响因子：1.212
出版年份：2017
出版刊次：5
点击下载：日粮中添加水飞蓟素对摄入了黄曲霉毒素的肉鸡的性能、肠道形态及回肠细菌数的影响