Dietary supplemental xylooligosaccharide modulates nutrient digestibility,intestinal morphology,and gut microbiota in laying hens

作     者：Jianmin Zhou Shugeng Wu Guanghai Qi Yu Fu Weiwei Wang Haijun Zhang Jing Wang Jianmin Zhou;Shugeng Wu;Guanghai Qi;Yu Fu;Weiwei Wang;Haijun Zhang;Jing Wang

作者机构：Laboratory of Quality&Safety Risk Assessment for Animal Products on Feed Hazards(Beijing)of the Ministry of Agriculture&Rural Affairsand National Engineering Research Center of Biological FeedFeed Research InstituteChinese Academy of Agricultural SciencesBeijing100081China 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2021年第7卷第1期

页      面：152-162页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 

基　　金：National Key R&D Program of China(2018YFD0500603) China Agricultural Research System(CARS40-K12) the China Agriculture Research System-Beijing Team for Poultry Industry and the Agricultural Science and Technology Innovation Program(ASTIP)of the Chinese Academy of Agricultural Sciences 

主　　题：Gut microbiota Ileal morphology Laying hen Nutrient digestibility Xylooligosaccharide 

摘      要：This study was conducted to evaluate the prebiotic effects of dietary xylooligosaccharide(XOS)sup-plementation on performance,nutrient digestibility,intestinal morphology,and gut microbiota in laying *** a 12-wk experiment,a total of 288 Hy-Line Brown layers at 50 wk of age were randomly assigned into 3 dietary treatments supplemented with XOS at 0,200 or 400 mg/*** treatment had 8 replicates with 12 birds *** fed XOS diets showed a lower feed-to-egg ratio during wk 7 to 12 and a higher egg yolk color value in wk 12 compared with those fed the control diet(P0.05).Dietary XOS supplementation improved the apparent total tract digestibility of gross energy and nitrogen at the end of the 12th wk(P0.05).In addition,a higher villus height-to-crypt depth ratio of the ileum was observed in XOS-added groups(P0.05).The high throughput sequencing analysis of bacterial 16S rRNA revealed that dietary XOS supplementation at 200 mg/kg altered cecal *** diversity analysis illustrated a higher cecal bacterial richness in birds fed with XOS at 200 mg/*** composition of cecal microbiota modulated by the XOS addition was characterized by an increased abundance of Firmicutes along with a reduced abundance of *** the genus level,dietary XOS supple-mentation triggered decreases in Bacteroides and Campylobacter concurrent with increases in Lactoba-cillus and several short chain fatty acid producers including Desulfovibrio,Faecalitalea,Faecalicoccus,and 5 genera of family ***,dietary XOS addition improved the feed conversion ratio by modulating nutrient digestibility and ileal morphology in laying hens,which could be attributed to the enhancement of bacterial diversity and alteration of microbial composition.