中国畜牧杂志2017，Vol.53Issue(9)：102-108,7.DOI:10.19556/j.0258-7033.2017-09-102
蛋氨酸锌对蛋鸡生产性能、肠道形态、组织学结构及盲肠微生物菌群的影响
Effects of Zinc-methionine on Performance, Intestinal Morphology, Histological Structure and Cecal Microbial Flora of Laying Hens
摘要
Abstract
This experiment was conducted to investigate the effects of zinc-methionine on egg quality,intestinal morphology and histological structure and cecal microbial flora to determine the scientific doses in laying hens.Five hundred and forty 20-week-old healthy Hyline White laying hens were randomly allocated to 6 groups with 6 replicates per group and 15 birds per replicate.Hens in group Ⅰ were fed a basal diet as the control,and those in group Ⅱ,Ⅲ,Ⅳ,Ⅴ and Ⅵ received the basal diets supplemented with 70,140,350,700 and 1 400 mg/kg zinc-methionine,respectively.The trail lasted for eight weeks.The results showed as follows:Compared with the control group,laying rate,daily egg mass,the ratio of feed to egg were notably increased and unqualified egg rate were significantly decreased (P＜0.05),eggshell strength,eggshell thickness,albumin height and haugh unit were remarkably improved (P＜0.05),villus height and ratio of villus height to crypt depth were notably increased (P＜0.05),the number of Bifidobacteria and Lactobacilli was remarkably increased and the amount of Escherichia coli was notably decreased (P＜0.05) in the cecal contents of laying hens in group Ⅱ and Ⅲ,however,laying rate,daily egg mass,the ratio of feed to egg were notably decreased and unqualified egg rate were significantly increased (P＜0.01),eggshell strength,eggshell thickness,albumin height and haugh unit were remarkably reduced (P＜0.01),villus height and ratio of villus height to crypt depth were notably decreased (P＜0.01),the amount of Escherichia coli was extremely increased (P＜0.01) and the number of Bifidobacteria and Lactobacilli was notably decreased (P＜0.01) in group Ⅵ.Damage occurred in duodenum and ileum of hens in group Ⅵ.The results indicated that dietary supplementation with optimal doses of zinc-methionine upregulated laying performance and egg quality,improved the intestinal morphology,optimized cecal microbiota of laying hens,but continuously improving the supplemental levels would lower its positive effect and even trigger negative effects.According to the quadratic curve fitting model,the optimal supplemental level of zinc-methionine is 50～100 mg/kg in the corn-soybean meal diet of laying hens during the peak period.关键词
蛋氨酸锌/蛋鸡/生产性能/肠道形态/组织学结构/微生物菌群Key words
Zinc-methionine/Laying hens/Performance/Intestinal morphology/Histological structure/Cecal microbial flora分类
农业科技引用本文复制引用
陈娜娜,马莲香,侯川川,何俊娜,郭阳,刘兵,余东游..蛋氨酸锌对蛋鸡生产性能、肠道形态、组织学结构及盲肠微生物菌群的影响[J].中国畜牧杂志,2017,53(9):102-108,7.基金项目
“十二五”国家科技支撑计划(2013BAD20B02) （2013BAD20B02）
农业部饲料质量安全监管专项(2014) （2014）
