α-硫辛酸对肉仔鸡肉品质及肌纤维组织特性的影响  

Effects of dietary alpha-lipoic acid on meat quality and histology characteristic of muscle fiber in broilers

作　　者：张勇[1] 刘来亭[1] 计成[2] 马秋刚[2] 白秀梅[2] 

机构地区：[1]河南工业大学生物工程学院 [2]中国农业大学动物科技学院

出　　处：《中国饲料》2010年第16期29-33,共5页China Feed

基　　金：973国家重点基础研究资助项目(2004CB117500);中国农业大学校内科研启动基金资助项目(2004DA125184-0808)

摘　　要：本试验研究了α-硫辛酸对肉仔鸡肉品质及肌纤维组织学特性的影响。采用单因子四水平有重复试验设计,将240只1日龄AA肉仔鸡,随机分为4个处理组,每组6个重复,每个重复10只,分别饲喂在玉米-豆粕型基础日粮上添加硫辛酸0、300、600、900mg/kg的日粮,试验期42d。结果表明:硫辛酸显著降低肉仔鸡平均日增重(P<0.05)和日采食量(P<0.05);硫辛酸显著增加肉仔鸡肌肉a(P<0.05),显著降低肌肉b(P<0.05)、剪切力(P<0.05);硫辛酸显著降低肉仔鸡肌纤维直径(P<0.05),并显著增加肌纤维密度(P<0.05);硫辛酸组显著增加慢肌(P<0.05)、快红肌(P<0.05)、肌球蛋白重链基因mRNA的相对表达百分比(P<0.05),并显著降低快白肌肌球蛋白重链基因mRNA的相对表达百分比(P<0.05)。本试验结果表明,硫辛酸可以通过影响肉仔鸡肌纤维组织特性、肌纤维类型的分布,而改善肉品质。An experiment was conducted to evaluate the effects of dietary alpha-lipoic acid （LA） level on meat quality and histology characteristics of muscle fiber in broilers.A total of 240 1-day-old male Arbor Acres broilers were randomly allocated to 4 dietary treatments which fed basal diets supplemented with 0,300,600 mg/kg and 900 mg/kg LA, respectively.Birds were slaughtered on 42 days old.The results showed that alpha-lipoic acid could significantly decrease ADG（P〈0.05） and ADFI（P〈0.05）.LA could signifcantly decrease myofibre diameter of broilers（P〈0.05）,and increase myofibre density（P〈0.05）.LA could significantly decrease SM relative ration（P〈0.05）,FRM relative ration（P〈0.05）,and decrese FWM relative ration （P〈0.05）.The results suggested that alpha-lipoic acid could improve the meat quality of broilers by affecting histology characteristics of muscle fiber and myofibre type.

关 键 词：硫辛酸 肉品质 肌纤维密度 肌纤维直径 肌球蛋白重链 肉仔鸡 

分 类 号：S816.7[农业科学—饲料科学]