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 sug
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
