Stimbiotic and wheat bran inclusion in maize or wheat-based diets for broiler chickens; effects on jejunal histomorphology, digesta oligosaccharides and caecal short-chain fatty-acids profiles.
IF 1.6 3区 农林科学Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
S Veluri, G González-Ortiz, M R Bedford, O A Olukosi
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引用次数: 0
Abstract
1. A stimbiotic (STB) is any feed additive that stimulates caeca fibre fermentation, although the additive itself contributes little to the caeca short-chain fatty acid (SCFA) production. A 42 d experiment investigated the interactive effects of STB and wheat bran (WB) in broiler chickens receiving maize or wheat-based diets.2. The treatments were arranged in a 2 × 2 × 2 factorial (eight replicates each), the dietary factors being diet (maize-SBM or wheat-SBM), STB (with or without) and WB (0 or 50 g/kg). Jejunal tissue, gizzard, jejunal and ileal digesta and caecal contents were collected on d 18 and 42.3. Gizzard pH tended to decrease with STB (p = 0.06) supplementation and was lower in birds fed wheat- compared to maize-based diets on d 18 (p < 0.05). Birds receiving diets with WB had higher jejunum pH on d 18 (p < 0.05).4. Total short-chain fatty acids (SCFA) in the caeca on d 18 and isobutyrate on d 42 were higher (p < 0.05) for maize compared with wheat-based diets. However, on d 42, acetate, butyrate and total SCFA were higher (p < 0.05) for wheat-based compared with maize-based diets.5. On d 18, STB and WB inclusion increased villi height (VH; p < 0.05) and VH to crypt depth ratio (VH/CD), respectively (p < 0.05). On d 42, VH (p < 0.05) and VH/CD were higher in wheat-based diets (p < 0.05). The VH/CD ratio was lower with STB supplementation (p < 0.05). Marker-corrected pentose oligosaccharides (Pent)4 and (Pent)5 concentrations in the ileal digesta were reduced (p < 0.05) with STB supplementation. In addition, STB decreased (Pent)3 concentration in maize-, but not wheat-based diets (p < 0.05).6. In conclusion, both WB and STB influenced gastrointestinal pH and jejunum histomorphology of broilers without increasing oligosaccharide concentration in the ileum and SCFA in the caeca.
1.刺激性生物制剂(STB)是指任何能刺激盲肠纤维发酵的饲料添加剂,尽管添加剂本身对盲肠短链脂肪酸(SCFA)的产生几乎没有影响。一项为期 42 天的实验研究了 STB 和麦麸(WB)对以玉米或小麦为基础日粮的肉鸡的交互影响。 2.处理以 2 × 2 × 2 的因子排列(每组 8 个重复),日粮因子为日粮(玉米-SBM 或小麦-SBM)、STB(添加或不添加)和 WB(0 或 50 克/千克)。在第 18 天和第 42.3 天收集空肠组织、胗、空肠和回肠消化物以及盲肠内容物。添加 STB(p = 0.06)后,胗的 pH 值呈下降趋势,第 18 天,与饲喂玉米的鸟类相比,饲喂小麦的鸟类胗的 pH 值更低(p p p p p p p p p p p p p p p p 4 和回肠消化物中(Pent)5 的浓度在饲喂玉米的鸟类中降低(p 3),而在饲喂小麦的鸟类中没有降低(p 4)。
期刊介绍:
From its first volume in 1960, British Poultry Science has been a leading international journal for poultry scientists and advisers to the poultry industry throughout the world. Over 60% of the independently refereed papers published originate outside the UK. Most typically they report the results of biological studies with an experimental approach which either make an original contribution to fundamental science or are of obvious application to the industry. Subjects which are covered include: anatomy, embryology, biochemistry, biophysics, physiology, reproduction and genetics, behaviour, microbiology, endocrinology, nutrition, environmental science, food science, feeding stuffs and feeding, management and housing welfare, breeding, hatching, poultry meat and egg yields and quality.Papers that adopt a modelling approach or describe the scientific background to new equipment or apparatus directly relevant to the industry are also published. The journal also features rapid publication of Short Communications. Summaries of papers presented at the Spring Meeting of the UK Branch of the WPSA are published in British Poultry Abstracts .