苯甲酸对1~21日龄肉鸡生长性能和肠道健康的影响

doi:10.3969/j.issn.1006-267x.2019.06.042

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摘要本试验旨在研究苯甲酸对白羽肉鸡生长性能、肠道形态及盲肠微生物的影响。试验采用单因子试验设计，选取360只1日龄的罗斯308（Ross 308）白羽肉鸡，随机分为3组，每组6个重复，每个重复20只。饲粮中苯甲酸的添加水平为0（对照组）、0.7%和1.4%。试验期为21 d。结果表明：1）与对照组相比，添加苯甲酸对1~21日龄肉鸡的平均增重（AWG）有提高趋势（P=0.066）；添加0.7%苯甲酸显著提高了1~21日龄肉鸡的平均采食量（AFI）（P<0.05）。2）与对照组相比，添加苯甲酸显著提高空肠绒毛高度和绒隐比（P<0.05），对隐窝深度无显著影响（P>0.05）。3）与对照组相比，添加苯甲酸对21日龄肉鸡空肠酶活性无显著影响（P>0.05），但从数值上看，添加0.7%苯甲酸提高了空肠酶活性。4）与对照组相比，添加苯甲酸对肉鸡盲肠微生物菌群无显著影响（P>0.05）；从数值上看，添加苯甲酸降低了肉鸡21日龄大肠杆菌数量。由此得出，苯甲酸能够提高肉鸡空肠绒毛高度和绒隐比，进而在一定程度上提高1~21日龄肉鸡的生长性能，但对盲肠微生物数量没有显著影响；1~21日龄肉鸡饲粮苯甲酸的添加水平以0.7%效果较好。

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关键词 ：苯甲酸, 生长性能, 肠道形态, 肠道微生物, 肉鸡

Abstract：This study was to investigate the effects of benzoic acid on the growth performance, intestinal morphology and cecal microflora of white feather broilers. A single factor experiment design was used to select 360 1-day-old male broilers (Ross 308) and randomly divided into 3 groups with 6 replicates per group and 20 broilers per replicate. The supplemental levels of benzoic acid was 0 (control group), 0.7% and 1.4%, respectively; the test lasted for 21 days. The results showed as follows:1) compared with the control group, adding benzoic acid increased the average weight gain (AWG) of broilers at 21 days of age (P=0.066); adding 0.7% benzoic acid significantly increased the average feed intake (AFI) of broilers at 21 days of age (P<0.05). 2) Compared with the control group, addition of benzoic acid significantly increased the jejunum villous height and villous height/crypt depth (P<0.05), but there was no significant difference in crypt depth (P>0.05). 3) Compared with the control group, there was no statistical difference in jejunal enzyme activity of broilers at 21 days of age (P>0.05), but numerically, adding 0.7% benzoic acid increased the jejunal enzyme activity. 4) Compared with the control group, addition of benzoic acid had no significant effect on cecal microflora of broilers (P>0.05), but numerically, the addition of benzoic acid reduced the number of Escherichia coli of broilers at 21 days of age. It can be concluded that benzoic acid can increase the jejunum villous height and villous height/crypt depth of broilers, and then improve the growth performance of broilers at 1 to 21 days of age, but has no significant effect on cecal microflora number; the effect of adding 0.7% benzoic acid in the diet is better for broilers at 1 to 21 days of age.

Key words： benzoic acid growth performance intestinal morphology intestinal microflora broilers

收稿日期: 2018-11-19

PACS:

S831

基金资助:

"十三五"育种攻关计划项目（2016NYZ0052）

通讯作者: 彭焕伟,副研究员,硕士生导师,E-mail:414364381@qq.com;丁雪梅,副教授,硕士生导师,E-mail:dingxuemei0306@163.com E-mail: 414364381@qq.com;dingxuemei0306@163.com

作者简介: 黄灵杰(1993-),女,四川通江人,硕士研究生,从事家禽营养研究。E-mail:13438286483@163.com

引用本文:

黄灵杰, 张克英, 白世平, 王建萍, 曾秋凤, 彭焕伟, 丁雪梅, 彭险峰, 覃宗华. 苯甲酸对1~21日龄肉鸡生长性能和肠道健康的影响[J]. 动物营养学报, 2019, 31(6): 2816-2822.
HUANG Lingjie, ZHANG Keying, BAI Shiping, WANG Jianping, ZENG Qiufeng, PENG Huanwei, DING Xuemei, PENG Xianfeng, TAN Zonghua. Effects of Benzoic Acid on Growth Performance and Intestinal Health of Broilers at 1 to 21 Days of Age. Chinese Journal of Animal Nutrition, 2019, 31(6): 2816-2822.

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http://www.chinajan.com/CN/10.3969/j.issn.1006-267x.2019.06.042 或 http://www.chinajan.com/CN/Y2019/V31/I6/2816

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