摘要
试验旨在研究日粮不同纤维水平对大恒优质肉鸡胃肠道发育、免疫指标及血清生化指标的影响。选用1日龄健康大恒优质肉仔鸡公鸡600只,随机分成4组,每组10个重复,每个重复15只,以苜蓿草粉为纤维源,各组分别饲喂粗纤维(CF)水平为2.5%、5%、7%和9%的试验日粮。试验期75 d。结果表明:(1)2.5%CF组高密度脂蛋白含量极显著低于5%、7%、9%CF组(P<0.01)。(2)2.5%CF组十二指肠相对重量、空肠的相对长度与肠道密度显著高于7%和9%CF组(P<0.05),而肌胃相对重量则极显著低于5%、7%、9%CF组(P<0.01);5%CF组十二指肠相对重量与长度显著高于7%、9%CF组(P<0.05),回肠相对重量显著高于9%CF组(P<0.05),而肌胃相对重量显著低于9%CF组(P<0.05);7%CF组肌胃相对重量显著低于9%CF组(P<0.05);9%CF组回肠相对长度显著高于2.5%、5%、7%CF组(P<0.05),而肠道密度极显著低于2.5%、5%、7%CF组(P<0.01);各处理间十二指肠形态结构无显著差异(P>0.05)。(3)各处理间免疫器官指数和血清免疫指标无显著差异(P>0.05)。由此可见,大恒优质肉鸡对粗纤维有一定的耐受能力,综合胃肠道发育、免疫指标和血清生化指标,日粮中大恒优质肉鸡粗纤维水平使用量不应超过7%。
The objective of this study was to determine the effects of dietary fiber level on gastrointestinal tract development,immune indices and serum biochemical indices of Daheng broiler. A total of 600 healthy one-day-age Daheng male broilers were randomly divided into 4 groups with 10 replicates per group and 15 broilers per replicate.Alfalfa meal was used as fiber source. Daheng broilers in the 4 groups were fed the experimental diets supplemented with 2.5%, 5%, 7% and 9% crude fiber, respectively. The experiment lasted for 75 days. The results showed as follows:(1) The content of high density lipoprotein in serum in 2.5% CF group was extremely significantly lower than those in5%, 7% and 9% CF groups(P<0.01).(2) The relative weight of duodenum, the relative length and density of jejunum in 2.5% were significantly higher than those in 7% and 9% CF groups(P<0.05), while the relative weight of gizzard in2.5% CF group was extremely significantly lower than those in 5%, 7% and 9% CF groups(P<0.01). The relative weight and length of duodenum in 5% CF group were significantly higher than those in 7% and 9% CF groups(P<0.05),the relative weight of ileum in 5% CF group was significantly higher than that in 9% CF group(P<0.05), while the relative weight of gizzard in 5% CF groups was significantly lower than that in 9% CF group(P<0.05). The relative weight of gizzard in 7% CF groups was significantly lower than that in 9% CF group(P<0.05). The relative length of the ileum in 9% CF group was significantly higher than those in 2.5%, 5% and 7% CF groups(P<0.05), while ileum density of in 9% CF group was extremely significantly lower than those in 2.5%, 5% and 7% CF groups(P<0.01). The morphology of duodenum in all CF groups were no significant differences(P>0.05).(3) The immune organ indices and serum immune indices in all CF groups were no significant differences(P>0.05). In summary, Daheng broiler had tolerance to crude fiber. Combined gastrointestinal tract development, immune indices and serum biochemical indices, it was suggested that the dietary crude fiber level was lower than 7% in the diet of Daheng broiler.
作者
彭涵
杨朝武
陈家磊
杨礼
胡陈明
张增荣
熊霞
宋小燕
邱莫寒
余春林
夏波
杜华锐
李晴云
PENG Han;YANG Chaowu;Chen Jialei;YANG Li;HU Chenming;ZHANG Zengrong;XIONG Xia;SONG Xiaoyan;QIU Mohan;YU Shun;XIA Bo;Dl Huarui;LI Qingyun(Sichuan Animal Science Academy,Chengdu,Sichuan 610066;Animal Breeding and Genetics Key Laboratory of Sichuan Province,Chengdu,Sichuan 610066;Sichuan Daheng Poultry Breeding Co.,Ltd.,Chengdu,Sichuan 110066#)
出处
《中国家禽》
北大核心
2019年第24期34-39,共6页
China Poultry
基金
四川省基本科研业务专项（SASA2018A09）
四川省科技支撑计划（2016NYZ0025、2018NZDZX0004、2019YFN0009）
四川省财政专项（SASA2014CZYX002）
关键词
日粮纤维
大恒优质肉鸡
胃肠道发育
免疫指标
血清生化指标
dietary fiber
Daheng broiler
gastrointestinal tract development
immune indices
serum biochemical indices
作者简介
彭涵(1989-),男,领士,助理研究员,主要从事家禽营养研究,E-mail:429441032@qq.com;通讯作者:李晴云(1964-),男,本科,研究员,主要从事家禽育种与生产研究,E-mail:liqingyun2008@163.com。
