| 摘要: |
| 为确证免疫刺激对肉仔鸡生产性能及肌肉品质的影响,取108只1周龄肉仔鸡,均分为2个组,对照组(CK)和脂多糖(LPS)组。LPS组每周1、3、5按500 μg/kg BW腹腔注射LPS,对照组注射等量生理盐水,8~21日龄连续2周。21日龄时,测定生产性能及血液皮质酮及IL-1β水平。42日龄时,测生产性能,胸肌率、腿肌(带骨)率、腹脂率;胸肌及腿肌pH,滴水损失率和肌肉剪切力;胸肌中的蛋白质、脂肪含量、蛋白脂肪比及胸肌纤维面积。结果表明, LPS刺激对肉仔鸡血液皮质酮及IL-1β含量,前期及全期生产性能没有显著影响(P＞0.05)。LPS组肉仔鸡腹脂率及胸肌蛋白脂肪比分别比对照组高17.81%和36.94%,而胸肌pH比对照组低2.23%,均差异显著(P＜0.05)。结果显示:免疫刺激尽管对肉仔鸡生产性能没有显著影响,但对胴体品质,胸肌肌肉品质均会产生不良影响。 |
| 关键词: 肉仔鸡 脂多糖 免疫刺激 胴体品质 肌肉品质 |
| DOI：10.11841/j.issn.1007-4333.2011.01.010 |
| 投稿时间：2010-05-18 |
| 基金项目:国家"973"计划项目资助(2004CB117504) |
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| Effect of lipopolysaccharide (LPS) challenge on performanceand meat quality of broiler chickens |
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HU Xiao-fei1,2, WEI Feng-xian3, GUO Yu-ming2
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| (1.Henan Key Laboratory for Animal Immunology,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;2.State Key Laboratory of Animal Nutrition/College of Animal Science and Technology,China Agricultural University,Beijing 100193,China;3.Institute of Animal Husbandry and Veterinary Science,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China) |
| Abstract: |
| To test the effect of immunological challenge on performance and meat quality of broiler chickens,108 7-d broiler chickens were divided into control group (CK) and experimental group (LPS).Birds in LPS group were injected with 500 μg/kg BW LPS dissolved in saline on Monday,Wednesday and Friday since 8-d of age for continuous 2 weeks,meanwhile,birds in CK were injected with saline.The performance and serum corticosterone and IL-1β level of broiler chickens were evaluated on 21-d.The performance,percentage of pectoralis and thigh muscle (with bone) and abdominal fat;the drip loss rate,pH value and shear force of pectoralis and thigh muscle;the protein and fat content,protein/fat ratio and myofiber area of pectoralis of broiler chickens were assayed on 42-d.Results showed that LPS challenge had no significant effect on serum corticosterone and IL-1β level and growth performance (P>0.05).The percentage of abdominal fat,protein/fat ratio of pectoralis of birds in LPS were about 17.81% and 36.94% higher than those in CK,respectively (P<0.05),while pH value of pectoralis were about 2.23% lower than those in CK (P<0.05).In conclusion,immunological challenge had no effect on growth performance,but had significant negative effects on the carcass quality and meat quality of broiler chickens. |
| Key words: broiler chicken LPS immunological challenge carcass quality meat quality |
