| 谷氨酰胺对肉鸡小肠组织结构和吸收能力的影响 |
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| 引用本文： | 路 静,李文立,姜建阳,李方正,任慧英.谷氨酰胺对肉鸡小肠组织结构和吸收能力的影响[J].动物营养学报,2012(2):291-300. |
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| 作者姓名： | 路 静 李文立 姜建阳 李方正 任慧英 |
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| 作者单位： | 青岛农业大学动物科技学院，青岛 ２６６１０ |
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| 基金项目： | 山东省自然科学基金（编号：ＺＲ２００９ＤＭ０４５） |
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| 摘 要： | 本试验旨在研究饲粮不同添加水平谷氨酰胺(Gln)对热应激肉鸡小肠组织结构和吸收能力的影响.选用1日龄科宝- 500肉鸡240只,随机分为6个处理,每个处理4个重复,每个重复10只.Ⅰ组为对照组,饲喂玉米-豆粕型基础饲粮,Ⅱ、Ⅲ、Ⅳ、Ⅴ和Ⅵ组为试验组,分别饲喂在基础饲粮中添加0.4％、0.8％、1.2％、1.6％和2.0...
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| 关 键 词： | 谷氨酰胺 热应激 肉鸡 生长性能 小肠组织结构 吸收能力 |
Dietary Glutamine Affects Small Intestinal Structure and Absorption in Broilers |
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| LU Jing,LI Wenli,JIANG Jianyang,LI Fangzheng,REN Huiying.Dietary Glutamine Affects Small Intestinal Structure and Absorption in Broilers[J].Acta Zoonutrimenta Sinica,2012(2):291-300. |
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| Authors: | LU Jing LI Wenli JIANG Jianyang LI Fangzheng REN Huiying |
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| Institution: | (College of Animal Science and Technology,Qingdao Agricultural University,Qingdao 266109,China) |
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| Abstract: | The experiment was conducted to study the effects of dietary glutamine(Gln) on small intestinal structure and absorption in broilers suffered from heat stress.Two hundred and forty Cobb-500 one-day-old broilers were randomly selected and divided into 6 treatments with 4 replicates in each treatment and 10 chicks in each replicate.The broilers in group Ⅰ(control group) were fed a basal diet,and those in groups Ⅱ,Ⅲ,Ⅳ,Ⅴ and Ⅵ were fed the basal diet supplemented with 0.4%,0.8%,1.2%,1.6% and 2.0% glutamine,respectively.The experiment lasted for four weeks(days 15 to 42).During the experimental period,the temperature was maintained at(35±2) ℃ from 09:00 to 17:00,and was maintained at(30±2) ℃ from 17:00 to 09:00 of the next day.The relative humidity of the chicken house was controlled between 70% and 80%.The results showed as follows: 1) the supplementation of Gln in diets significantly influenced growth performance of broilers aged from 29 to 42 days(P<0.05),in which the supplementation of 1.2% Gln was the best,but there was no significant difference among all groups during 15 to 28 days(P>0.05).2) At 28 days of age,the supplementation of Gln from 0.8% to 2.0% in diets significantly increased the villus height of duodenum and jejunum of broilers(P<0.05 or P<0.01),and 2.0% Gln group was significantly higher than the other groups(P<0.01).The supplementation of 0.4%,1.2% and 2.0% Gln in diets significantly increased the villus height of ileum of broilers(P<0.05 or P<0.01),and 1.2% Gln group was significantly higher than the other groups(P<0.01).At 42 days of age,the supplementation of Gln in diets significantly decreased the villus width and crypt depth of duodenum of broilers(P<0.05 or P<0.01);the supplementation of 1.2% Gln in diets significantly increased the villus height of duodenum(P<0.01);the supplementation of 1.2%,1.6% and 2.0% Gln in diets significantly increased the villus height and decreased the villus width(P<0.05 or P<0.01);and the supplementation of 1.2% Gln in diets significantly decreased the thickness of lamina propria of jejunum and ileum(P<0.05 or P<0.01).3) The small intestinal absorption was significantly increased when the supplemental level of Gln was 2.0% at 28 days of age(P<0.01) and 1.2% at 42 days of age(P<0.05).In conclusion,dietary glutamine can improve the small intestinal structure and absorption in broilers suffered from heat stress,and the suitable level in diets is 2.0% from 15 to 28 days of age and 1.2% from 29 to 42 days of age. |
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| Keywords: | glutamine heat stress broilers growth performance small intestinal structure absorption |
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