| Agricultural sciences |
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| Effect of creatine monohydrate on carcass characteristics and drip loss in meat duck |
| CHENG Ling-hao,GAO Feng,WEN Ruo-zhu,LI Jiao-long,ZHOU Guang-hong |
| CHENG Ling-hao,College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China;Key Laboratory of Meat Processing and Quality Control,Ministry of Education,Nanjing Agricultural University,Nanjing210095,China GAO Feng,College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China;Key Laboratory of Meat Processing and Quality Control,Ministry of Education,Nanjing Agricultural University,Nanjing210095,China WEN Ruo-zhu,College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China;Key Laboratory of Meat Processing and Quality Control,Ministry of Education,Nanjing Agricultural University,Nanjing210095,China LI Jiao-long,College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China;Key Laboratory of Meat Processing and Quality Control,Ministry of Education,Nanjing Agricultural University,Nanjing210095,China ZHOU Guang-hong,Key Laboratory of Meat Processing and Quality Control,Ministry of Education,Nanjing Agricultural University,Nanjing210095,China |
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Abstract The effect of creatine monohydrate (CMH) supplementation on growth performance,carcass characteristics and drip loss in Cherry Valley duck was investigated . A total of 360 healthy 25-day-old ducks were randomly divided into4 groups,and every group included 3 replications which contained30 ducks each . Experimental treatments were consist of :Ⅰ) a control diet;Ⅱ) a control diet with0.0 5% CMH for15 days;Ⅲ) a control diet with0.4 % CMH for5 days followed by a control diet with0.0 5% CMH for the next10 days;Ⅳ) a control diet with0.4 % CMH for15 days.The official test was last for 15 days before slaughtered . The result showed that,no matter which dosing regimen,CMH supplementation significantly increased the percentage of leg muscle,and all improved the pH45 min,pH24 h,decreased the drip loss,especially the percentage of lean meat significantly improved by4.5 7% ( P<0.0 5) and the drip loss in leg muscle significantly decreased by 34.6 0% ( P <0.0 5) with 0.4 % CMH for5 days followed by 0.0 5% CMH for the next 10 days supplementation . Besides,the blood creatine level also improved with different CMH supplementation,in which0.0 5% CMH was significant improved by 33.6 4% ( P < 0.0 5) . These results indicate that CMH supplementation may delay the postmortem pH decline,and have a raising trend of water-holding capability . As a consequence,Cherry Valley duck may be classified as a responder or quasi-responder to CMH supplementation,and adding 0.4 % CMH for5 days followed by0.0 5% CMH for the next10 days was better than others .
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Published: 09 November 2010
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一水肌酸对肉鸭胴体组成及肌肉系水力的影响
研究不同的一水肌酸(creatine monohydrate,CMH)补给方案对樱桃谷鸭生长性能、屠宰性能 以及肌肉系水力的作用效果 。试验选取体质量相近的25日龄健康樱桃谷鸭360羽,随机分成4组 :Ⅰ组 为对照组,饲喂基础日粮 ;Ⅱ组饲喂基础日粮 +0 .05%CMH ;Ⅲ组试验期前5 d饲喂基础日粮 +0 .4% CMH,随后10 d饲喂基础日粮+0 .05% CMH ;Ⅳ组饲喂基础日粮+0.4 % CMH 。每组3个重复,每个 重复30羽,试验期为宰前15 d 。结果表明 :添加 CMH能显著提高肉鸭腿肌率,提高肉鸭胸肌、腿肌宰后 pH45 min、pH24 h,减少胸肌、腿肌滴水损失 ;其中,前5 d添加0.4 % CMH随后10 d添加0.0 5% CMH的 试验组其瘦肉率显著提高4.5 7%( P<0.0 5),腿肌滴水损失显著下降34.6 0%( P<0.0 5) ;另外,补充 CMH能提高肉鸭血浆中肌酸含量,添加0.4 % CMH其含量显著提高33.6 4%( P<0.0 5) 。结果提示 : 饲料中添加 CMH能延缓宰后 pH下降,提高肌肉系水力 ;前5 d添加0.4 % CMH随后10 d添加 0.0 5% CMH的补给效果优于其他方案,且樱桃谷鸭属于有效者或拟有效者 。
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