文档介绍：
日粮中添加牛磺酸对不同饲养方式蛋鸡血
液及肝脏功能的影响
马子力,代斌,苗晋锋**
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(南京农业大学动物医学院,南京,210095)
摘要:选择生长发育正常的绿壳蛋鸡 15000 只,随机分成笼养高密度组、笼养低密度组和散
养组,每组又分为对照组和实验组,2500 只/组。对照组饲喂正常日粮,实验组饲喂添加了
%的牛磺酸的日粮,试验期间自由饮水。在试验期第 90 天,每组随机选取 10 只采集血
液和肝脏,进行肝脏形态和相关生化指标检测。形态学检测显示,和散养蛋鸡相比,笼养蛋
鸡肝脏局部出现了一些进行性的蜕变,%牛磺酸饲喂能缓解这些变化,与 ALT、AST 活
性检测结果相符。与散养组相比,笼养组组织炎症介质水平较高;与笼养高密度组相比,笼
养低密度组组织炎症介质水平较低;日粮中添加牛磺酸可以降低肝脏炎症介质水平。检测血
清脂质代谢水平,与散养组相比,笼养组血清 TG、TC 和 LDL-C 含量较高,HDL-C 含量较
低;与笼养高密度组相比,笼养低密度组血清 TG、TC 和 LDL-C 含量较低,HDL-C 含量较
高;日粮中添加牛磺酸可以降低血清中 TG、TC 和 LDL-C 含量,提高 HDL-C 含量。血清
和肝脏组织氧化和抗氧化水平与饲养方式和牛磺酸也密切相关,与散养组相比,笼养组血清
和肝脏组织中 MDA 含量较高,SOD 和 T-AOC 活性较低;与笼养高密度相比,笼养低密度
组血清和肝脏组织中 MDA 含量较低,SOD 和 T-AOC 活性较高;日粮中添加牛磺酸可以降
低血清和肝脏组织中 MDA 含量,提高 SOD 和 T-AOC 活性。研究结果说明散养、降低饲养
密度和日粮中添加牛磺酸可以提高肝脏组织抗氧化水平,调控机体的代谢,改善饲养应激造
成的肝脏组织损伤。进而提高蛋鸡的健康水平。
关键词:基础兽医;肝脏;饲养方式;牛磺酸;蛋鸡
中图分类号:
The influence of dietary taurine on serum and hepatic
functions in laying hens of different rearing modes
MA Zili, DAI Bin, MIAO Jinfeng
(College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095)
Abstract: In this study, 15000 green-shell laying hens were randomly assigned into a free range group,
and 2 caged groups with low-density and high-density housing. Each group was further divided into the
control (C) and taurine treatment (T) groups. All the test subjects were fed the same basic diet except
that the T groups were supplemented with % taurine. After 90 days, serum, livers were aseptically
collected. Histologic observation showed the changes were obviously in high-density group; most
hepatic structures were near normal; no histomorphological abnormality was found in free range group;
dietary with % taurine can protect hepatic structures. The activities of ALT and AST in caged
groups were higher than free range group; parison C groups, the activities of ALT and AST were
less in T groups. Relative to free range group, the inflammatory mediator levels were higher; there