饲粮中添加膳食纤维对肉鸡生长性能和肠道健康影响的Meta分析

Effects of Dietary Fiber Supplementation in Diet on Growth Performance and Intestinal Health of Broiler Chickens:A Meta-Analysis

本研究旨在通过Meta分析探讨饲粮中添加膳食纤维对肉鸡生长性能和肠道健康的影响。通过检索Web of Science、PubMed、中国知网、万方等数据库中2007—2022年关于膳食纤维对肉鸡生长性能和肠道形态影响的试验研究,共筛选到27篇文献,共计5310羽肉鸡。采用Re⁃view Manager 5.3软件对肉鸡平均日增重(ADG)、终末体重(FBW)、平均日采食量(ADFI)、料重比(F/G)和回肠绒毛高度(VH)、隐窝深度(CD)、绒毛高度/隐窝深度(VH/CD)及肌胃相对重量(GRW)进行分析。结果表明:与对照组相比,饲粮中添加膳食纤维显著提高了肉鸡ADG[合并效应值(MD)=1.01,95%置信区间(95%CI)为0.29~1.72,P=0.00600]、FBW(MD=45.05,95%CI为16.68~73.42,P=0.00200)和回肠VH(MD=36.58,95%CI为14.22~58.94,P=0.00100)及GRW(MD=0.16,95%CI为0.11~0.21,P<0.00001);显著降低了肉鸡F/G(MD=-0.04,95%CI为-0.06~-0.01,P=0.00800);而饲粮中添加膳食纤维对肉鸡ADF(MD=0.29,95%CI为-0.59~1.17,P=0.52000)及回肠CD(MD=5.51,95%CI为-1.83~12.86,P=0.14000)、VH/CD(MD=0.06,95%CI为-0.01~0.14,P=0.09000)的影响不显著。亚组分析表明,饲粮中添加不溶性膳食纤维(IDF)可显著提高肉鸡ADG(MD=1.34,95%CI为0.56~2.12,P=0.00070)及回肠VH(MD=50.37,95%CI为24.22~76.51,P=0.00020)、VH/CD(MD=0.25,95%CI为0.17~0.32,P<0.00001),显著降低了F/G(MD=-0.04,95%CI为-0.06~-0.02,P=0.00060);饲粮中添加可溶性膳食纤维(SDF)对肉鸡ADFI(MD=0.71,95%CI为-0.68~2.10,P=0.32000)、ADG(MD=0.69,95%CI为-0.65~2.03,P=0.31000]、F/G(MD=-0.04,95%CI为-0.09~0.01,P=0.09000)及回肠VH(MD=17.00,95%CI为-5.51~39.50,P=0.14000]、CD(MD=3.01,95%CI为-3.10~9.13,P=0.33000)、VH/CD(MD=-0.27,95%CI为-0.79~0.29,P=0.36000)的影响不显著。由此可见,肉鸡饲粮粗纤维含量在1.43%~6.17%时,添加膳食纤维具有改善肉鸡生长性能和肠道健康的作用。与SDF相比,IDF具有更好的提高肉鸡生长性能和肠道健康的作用。

The aim of this study was to explore the effects of dietary fiber supplementation in diet on growth performance and intestinal health of broiler chickens by a Metaanalysis.By searching the Web of Science,PubMed,CNKI and Wanfang databases for experimental studies on the effects of dietary fiber on the growth performance and intestinal morphology of broilers from years 2007 to 2022,a total of 27 articles were selected,totaling 5310 broilers.The Review Manager 5.3 software was used to analyze indicators such as average daily gain(ADG),final body weight(FBW),average daily feed intake(ADFI)and ileal villus height(VH),crypt depth(CD),villus height/crypt depth(VH/CD)and gizzard relative weight(GRW)of broiler chickens.The results showed that compared with the control group,dietary fiber supplementation in diet significantly increased the ADG[merge effect(MD)=1.01,95%confidence interval(95%CI):0.29 to 1.72,P=0.00600],FBW(MD=45.05,95%CI:16.68 to 73.42,P=0.00200),ileal VH(MD=36.58,95%CI:14.22 to 58.94,P=0.00100)and GRW(MD=0.16,95%CI:0.11 to 0.21,P<0.00001)of broiler chickens,significantly decreased the F/G(MD=-0.04,95%CI:-0.06 to-0.01),P=0.00800)of broiler chickens,and dietary fiber supplementation in diet had no significant effects on ADFI(MD=0.29,95%CI:-0.59 to 1.17,P=0.52000),ileal CD(MD=5.51,95%CI-1.83 to 12.86,P=0.14000)and VH/CD(MD=0.06,95%CI:-0.01 to 0.14,P=0.09000)of broiler chickens.The subgroup analysis showed that the insoluble dietary fiber(IDF)supplementation in diet significantly increased the ADG(MD=1.34,95%CI:0.56 to 2.12,P=0.00070),ileal VH(MD=50.37,95%CI 24.22 to 76.51,P=0.00020)and VH/CD(MD=0.25,95%CI:0.17 to 0.32,P<0.00001),and significantly decreased the F/G(MD=-0.04,95%CI:-0.06 to-0.02,P=0.00060)of broiler chickens;the soluble dietary fiber(SDF)supplementation in diet had no significant effects on ADFI(MD=0.71,95%CI:-0.68 to 2.10,P=0.32000),ADG(MD=0.69,95%CI:-0.65 to 2.03,P=0.31000),F/G(MD=-0.04,95%CI:-0.09 to 0.01,P=0.09000),ileal VH(MD=17.00,95%CI:-5.51 to 39.50,P=0.14000),CD(MD=3.01,95%CI:-3.10 to 9.13,P=0.33000)and VH/CD(MD=-0.27,95%CI:-0.79 to 0.29,P=0.36000)of broiler chickens.In conclusion,when the crude fiber content in broiler chickens’diet from 1.43%to 6.17%,the dietary fiber supplementation in diet can improve the growth performance and intestinal health of broiler chickens.Compared with SDF,IDF has a greater effect on improving the growth performance and intestinal health of broiler chickens.