畜牧兽医学报2018，Vol.49Issue(4)：725-735,11.DOI:10.11843/j.issn.0366-6964.2018.04.009
颗粒饲料中小麦粉碎粒度对肉鸡生产性能和肠道屏障功能的影响
Effects of Wheat Grinding Particle Size in Pellet Diets on Growth Performance and Intestinal Barrier Function of Broilers
摘要
Abstract
The experiment was conducted to study the effects of wheat grinding particle size in pellet diets on growth performance and intestinal barrier function of broilers.A total of 385 1-dayold AA male broilers were assigned to 5 groups with 7 replicates per group and 11 broilers per replicate.The 5 groups differed only in aperture size of screen surface(2,4,6,8,10 mm).The diet was wheat-soybean meal diet.The experiment lasted for 42 days,1 to 21 days and 22 to 42 days stages.On 22 and 43 days of age,one bird per replicate was slaughtered to determine jejunum morphology,the gene expression of ZO-1,occludin,claudin-1 and inflammatory factors in jejunum mueosa,and microbial count in caecum digesta.The results showed that:1) Wheat grinding particle size had significant effect on body weight gain,feed intake and F/G from 1 to 21 days of age (P＜0.05),and had a significant quadratic effect on body weight gain and F/G(P＜ 0.05).Wheat grinding particle size had no significant effect on body weight gain and feed intake from 22 to 42 days and 1 to 42 days (P＞0.05),but significantly increased F/G and had linearly effect on F/G(P＜0.05).2) With the wheat grinding particle size increased,the villus height and villus height/crypt depth significantly increased in jejunum of broilers(P＜0.05),and the wheat grinding particle size had a significant quadratic effect on the crypt depth (P＜0.05).3) The relative expression of occludin and IL-4 mRNA were significantly affected by wheat grinding particle size in broilers at 21 d(P＜0.05).Wheat grinding particle size had significant linear effect on microbial count in caecum(P＜0.05).The count of Lactobacillus increased significantly and the count of Salmonella,Escherichia coli and C.perfringens decreased significantly(P＜0.05) with the wheat grinding particle size increasing.In conclusion,the wheat grinding particle size of 580-760 μm(aperture size of screen surface is 4-6 mm)in pellet diet (contain xylanase) is advantageous to growth performance and intestinal barrier function of broilers.关键词
小麦/粉碎粒度/肉鸡/生产性能/肠道屏障Key words
wheat/grinding particle size/broiler/growth performance/intestinal barrier分类
农业科技引用本文复制引用
丁雪梅,钟丽梅,李东东,曾秋凤,张克英,白世平,王建萍..颗粒饲料中小麦粉碎粒度对肉鸡生产性能和肠道屏障功能的影响[J].畜牧兽医学报,2018,49(4):725-735,11.基金项目
公益性行业(农业)科研专项(201203015) （农业）
