一水肌酸对肥育猪胴体组成及肌肉系水力的影响  

Effects of Creatine Monohydration on Carcass Composition,Drip Loss and Approach to Its Mechanism in Finishing Pigs

作　　者：韩新燕[1] 许梓荣[1] 邵明丽[1] 闻尧祥 

机构地区：[1]浙江大学饲料科学研究所动物分子营养学教育部重点实验室,杭州310029 [2]浙江宁波梅湖牧业有限公司,宁波315124

出　　处：《动物营养学报》2007年第4期401-406,共6页CHINESE JOURNAL OF ANIMAL NUTRITION

摘　　要：本研究旨在观察一水肌酸(creatine monohydration,CMH)对肥育猪生长性能、胴体组成和系水力的影响及其机理探讨。选用体重70 kg左右的杜长大三元杂交猪48头,按试验要求随机分为2组,每组设3个重复,每个重复8头猪,分别饲喂含CMH为0或0.25%的日粮,饲养试验时间为30 d。结果发现,CMH对猪日增重无显著影响(P>0.05);CMH显著提高了肥育猪的眼肌面积(P<0.05),而对屠宰率、瘦肉率、胴体直长、胴体斜长、腹脂重、脂肪率、背膘厚、皮肤比率、骨骼比率等无显著影响(P>0.05);CMH还使试验组猪的背最长肌率显著提高(P<0.05),股二头肌率有提高趋势但差异不显著,而对其他骨骼肌重率无明显影响(P>0.05);CMH使肥育猪宰后24 h背最长肌和半膜肌的滴水损失明显降低(P<0.05)、pH显著提高(P<0.05),而肌肉中乳酸含量显著降低(P<0.05)。结果提示,饲料中添加一水肌酸可通过降低肌肉中乳酸的积累,提高肌肉的pH,从而降低宰后肌肉的滴水损失,改善肉质。This experiment was conducted to study the effect of creatine monohydration（CMH） on growth performance,carcass composition,drip loss and approach to its mechanism in finishing pigs. Forty-eight crossed-bred （Duroc × Landrace × Yorkshine） pigs,weighing an average of 70 kg,were randomly assigned to two dietary treatments with three replicates and eight pigs with each pen. The groups received the same basal diet supplemented with 0,0.25% CMH respectively. The feeding trial lasted for 30 days. The results showed that there was no effect of CMH on daily gain （ADG） （P〉0.05）. CMH raised the loin eye area （LEA） significantly （P〈0.05）, while there were no significant effect on percentage of dissected lean of carcass （PDL）,percentage of dissected fat （PDF）,mean backfat depth and other carcass-related index （P〉0.05）. CMH increased longissmus dorsi ratio significantly （P〈0.05） and no effects on other skeletal muscle. Adding CMH to diet could decrease drip loss and lactic acid, and increase pH value of longissimus and semimembransus at 24 h postmortem. These results indicated that CMH could decrease meat drip loss at postmortem and improve meat quality through decreasing lactic acid content and increasing pH value of muscle.

关 键 词：一水肌酸 胴体组成 肌肉系水力 肌肉pH 乳酸 肥育猪 

分 类 号：S828.5[农业科学—畜牧学]