畜牧兽医学报 ›› 2024, Vol. 55 ›› Issue (12): 5602-5619.doi: 10.11843/j.issn.0366-6964.2024.12.024

• 营养与饲料 • 上一篇    下一篇

纤维对白羽肉鸡生长性能、生理生化、胃肠结构和盲肠微生物的影响

陈鑫珠1,2,3(), 岳稳1, 方桂友1, 缪伏荣1, 黄庆祥2, 林平冬1, 李忠荣1,*(), 刘景1,*()   

  1. 1. 福建省农业科学院畜牧兽医研究所/福建省畜禽遗传育种重点实验室, 福州 350013
    2. 福建倍思达生物有限公司, 泉州 362599
    3. 福建福大百特科技发展有限公司博士后科研工作站, 福州 350007
  • 收稿日期:2024-07-12 出版日期:2024-12-23 发布日期:2024-12-27
  • 通讯作者: 李忠荣,刘景 E-mail:010622051@163.com;448655630@qq.com;184660569@qq.com
  • 作者简介:陈鑫珠(1985-), 女, 福建龙岩人, 副研究员, 博士, 主要从事动物营养与饲料科学研究, E-mail: 010622051@163.com
  • 基金资助:
    福建省人民政府·中国农业科学院农业高质量发展“5511”协同创新工程项目(XTCXGC2021012;XTCXGC2021019)

Effects of Fibers on Growth Performance, Physiology and Biochemistry, Gastrointestinal Structure and Cecal Microflora of Broilers

CHEN Xinzhu1,2,3(), YUE Wen1, FANG Guiyou1, MIAO Furong1, HUANG Qingxiang2, LIN Pingdong1, LI Zhongrong1,*(), LIU Jing1,*()   

  1. 1. Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences/Fujian Key Laboratory of Animal Genetics and Breeding, Fuzhou 350013, China
    2. Fujian Best Biological Co., LTD, Quanzhou 362599, China
    3. Postdoctoral Programme of Fujian Fuda Biotech Co., Ltd., Fuzhou 350007, China
  • Received:2024-07-12 Online:2024-12-23 Published:2024-12-27
  • Contact: LI Zhongrong, LIU Jing E-mail:010622051@163.com;448655630@qq.com;184660569@qq.com

摘要:

本试验旨在探究不同纤维种类和添加水平对白羽肉鸡生长性能、鸡粪中氮代谢和粪纤维含量、血清生化指标、胃肠结构和盲肠微生物的影响,为肉鸡日粮中纤维的合理利用提供理论依据。研究选用体重为(47.07±0.26) g的1日龄圣泽“901”白羽肉鸡公雏360羽,随机分成6组,每组6个重复,每个重复10羽。各组饲粮情况分别为基础饲粮+1.5 kg·t-1纤维样品1(T1组)、基础饲粮+2.5 kg·t-1纤维样品1(T2组)、基础饲粮+150 g·t-1纤维样品2(T3组)、基础饲粮+2 kg·t-1纤维样品3(T4组)、基础饲粮+3 kg·t-1纤维样品3(T5组)和基础饲粮(T6组)。试验分1~21 d和22~42 d两阶段,共42 d。结果表明: 与T6组相比,1) T2组22~42 d平均日采食量和1~42 d料重比分别显著提高了5.04%和3.07%(P < 0.05),T3组22~42 d和1~42 d料重比分别显著提高了4.16%和3.68%(P < 0.05),T5组21 d和42 d平均体重、1~21 d和1~42 d平均日增重以及22~42 d平均日采食量分别显著提高6.26%和4.93%、6.70%和5.02%以及4.87%(P < 0.05);2) T1组21 d氮的摄入量和氮存留量、T4组21 d氮存留率、T5组21 d氮存留率和42 d氮存留量分别显著提高了11.24%和16.77%、6.18%、7.65%和9.95%(P < 0.05),T5组21 d粪氮含量显著降低了6.87%(P < 0.05);3) T1组42 d尿素氮和总抗氧化能力分别显著提高333.33%和57.14%(P < 0.05),T2组21 d和42 d尿素氮含量分别显著提高375.00%和466.67%,21 d丙二醛含量显著降低17.69%(P < 0.05),T3组21 d和42 d尿素氮分别显著提高350.00%和233.33%,21 d丙二醛含量显著降低15.58%,42 d总蛋白和低密度脂蛋白分别显著降低15.34%和20.00%,谷丙转氨酶显著提高了102.70%(P < 0.05),T4组42 d葡萄糖含量显著提高35.36%(P < 0.05),T5组21 d白蛋白、甘油三酯和丙二醛分别显著降低10.79%、25.45%和33.60%,42 d高密度脂蛋白和谷丙转氨酶分别显著提高25.32%和62.16%(P < 0.05);4) T1组42 d回肠长度、T2组空肠重量和回肠长度、T3组空肠和回肠长度以及T5组回肠长度分别显著提高了5.04%、13.71%和19.26%、19.38%和21.84%以及23.18%(P < 0.05);5) T3组42 d回肠绒毛高度显著降低29.20%(P < 0.05),T5组42 d十二指肠和空肠隐窝深度分别显著提高116.67%和73.33%,十二指肠绒隐比显著降低48.02%(P < 0.05);6) Alpha和Beta多样性分析各组间盲肠微生物种群结构有明显差异,21 d肠道微生物OTU种类和数量增加,其中以BacteroidesAllstilpes中的Bacteroides fragilis AAlistipes finegoldii丰富度最高,为优势属种,21 d BacteroidesBacteroides fragilis A丰富度最高,42 d AllstilpesAlistipes finegoldii丰富度最高;KEGG通路功能预测分析其主要在碳水化合物代谢和氨基酸代谢中发挥功能作用,其次是转运和复制与修复。由此可见,基础饲粮添加纤维可促进肉鸡的肠道发育、改善和稳定肠道菌群结构,提高营养物质利用率,从而提高日增重和采食量。在本试验条件下,添加3 kg·t-1木之纤产品效果最佳。

关键词: 白羽肉鸡, 膳食纤维, 生长性能, 肠道结构, 肠道微生物

Abstract:

This trial was conducted to investigate the effect of different kind of fiber and different adding levels on growth performance, fecal nitrogen metabolism, fecal fiber content, serum biochemical index, the gastrointestinal structure and cecal microflora of broilers, in order to provide theoretical basis for the rational utilization of fiber in broilers' diet. Three hundred and sixty one-day-old healthy Shengze "901" male broilers with similar body weight (47.07±0.26 g) were randomly allotted into 6 groups with 6 replicates per group and 10 broilers per replicate. The broilers were randomly subjected to one of the following 6 treatments for 42 days with 2 periods: control group (T6 group) fed the basal diet, the addition groups were fed a basal diet supplemented with 1.5 kg·t-1 fiber sample 1 (T1 group), 2.5 kg·t-1 fiber sample 1 (T2 group), 150 g·t-1 fiber sample 2 (T3 group), 2 kg·t-1 fiber sample 3 (T4 group) and 3 kg·t-1 fiber sample 3 (group T5), respectively. The results showed as follows: compared with T6 group, 1) The average daily feed intake (ADFI) for 22-42 d and the feed/gain (F/G) for 1-42 d in T2 group were significantly increased by 5.04% and 3.07% (P < 0.05) respectively, the F/G for 22-42 d and 1-42 d in T3 group were significantly increased by 4.16% and 3.68% (P < 0.05) respectively, and average body weight (ABW) for 21 d and 42 d, average daily gain (ADG) for 1-21 d and 1-42 d and ADFI for 22-42 d in T5 group were increased significantly by 6.26% and 4.93%, 6.70% and 5.02% and 4.87% (P < 0.05) respectively; 2) The nitrogen intake and retention (NI and NR) at 21 d in group T1, the nitrogen retention rate (NRR) at 21 d in group T4, the NRR at 21 d in group T5 and the NR at 42 d were significantly increased by 11.24% and 16.77%, 6.18%, 7.65% and 9.95%, respectively (P < 0.05). Fecal nitrogen content in T5 group at 21 d was significantly decreased by 6.87% (P < 0.05); 3) Urea nitrogen (UN) and total antioxidant capacity (T-AOC) at 42 d in T1 group were significantly increased by 333.33% and 57.14% (P < 0.05) respectively, UR at 21 and 42 d in T2 group were significantly increased by 375.00% and 466.67% respectively, and malondialdehyde (MDA) at 21 d was significantly decreased by 17.69% (P < 0.05). In T3 group, UR at 21 and 42 d was significantly increased by 350.00% and 233.33% respectively, MDA at 21 d was significantly decreased by 15.58%, total protein (TP) and low density lipoprotein (LDL) at 42 d were significantly decreased by 15.34% and 20.00% respectively, and alanine aminotransferase (ALT) was significantly increased by 102.70% (P < 0.05). At 42 d, glucose content in T4 group was significantly increased by 35.36% (P < 0.05), and albumin (ALB), triglyceride (TG) and MDA at 21d in T5 group were significantly decreased by 10.79%, 25.45% and 33.60%, respectively. At 42 d, high density lipoprotein (HDL) and ALT were significantly increased by 25.32% and 62.16%, respectively (P < 0.05); 4) At 42 d, the ileum length (IL) in T1 group, the jejunum weight (JW) and IL in T2 group, the jejunum length (JL) and IL in T3 group and IL in T5 group were significantly increased by 5.04%, 13.71% and 19.26%, 19.38% and 21.84% and 23.18%, respectively (P < 0.05); 5) The villus height (VH) of ileum in T3 group was significantly decreased by 29.20% (P < 0.05) at 42 d, the crypt depth (CD) of duodenum and jejunum in T5 group were significantly increased by 116.67% and 73.33%, respectively, and the VH/CD of duodenum was significantly decreased by 48.02% (P < 0.05). 6) Alpha and Beta diversity analysis showed that caecum microflora has obvious difference between each group. The type and quantity of microbes OTU for 21 d was increased. Bacteroides fragilis A and Alistipes finegoldii in genus of Bacteroides and Allstilpes were the most abundant and were the dominant genera. Bacteroides and Bacteroides fragilis A were the highest richness at 21 days, and Allstilpes and Alistipes finegoldii were the highest richness at 42 days. It mainly played a functional role in carbohydrate metabolism and amino acid metabolism, and transport and replication and repair by KEGG pathway analysis. In conclusion, dietary fiber supplementation can promote intestinal development, improve and stabilize intestinal microflora, improve nutrient utilization, and thus increase daily gain and feed intake of broilers. Under the conditions of this experiment, adding 3 kg·t-1 Muzhiqian product has the best effect.

Key words: white-feathered broiler, dietary fiber, growth performance, intestinal development, microflora

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