DL-羟基蛋氨酸钙相对于DL-蛋氨酸的生物学效价  

Relative Bioefficacy of DL-Methionine Hydroxy Analog-Ca Salt Compared to DL-Methionine in Broiler Chicks

作　　者：李博[1,2] 武书庚[1] 张海军[1] 岳洪源[1] 齐广海[1] 

机构地区：[1]中国农业科学院饲料研究所,农业部饲料生物技术重点开放实验室,北京100081 [2]北京市动物卫生监督所,北京100044

出　　处：《中国畜牧杂志》2010年第15期35-40,共6页Chinese Journal of Animal Science

基　　金：国家科技支撑计划(200BAD12B06);赢创德固赛公司资助项目

摘　　要：试验采用肉仔鸡生产性能和胴体品质指标结合回归模型比较了DL-羟基蛋氨酸钙（DL-MHA-Ca）相对于DL-蛋氨酸（DLM）的生物学效价。选取792只体重相近且健康的AA肉仔鸡,随机分为11个处理,每个处理6个重复。DLM或DL-MHA-Ca按照等摩尔水平（0.03%、0.06%、0.10%、0.15%和0.21%）添加到仅缺乏蛋氨酸的基础日粮中。试验期35 d,分为7~21 d和22~42 d 2个阶段。结果表明：7~21 d和7~42 d,添加蛋氨酸源显著改善了肉仔鸡的体增重、饲料/增重、屠体重、胸肉重、胸肉率、腿肉重和全净膛重（P〈0.05）;在等摩尔基础上,DL-MHA-Ca相对于DLM的生物学效价,7~21 d分别是71%（增重）和66%（饲料/增重）;7~42 d则分别为63%（增重）、58%（饲料/增重）、74%（屠体重）、60%（胸肉重）、49%（胸肉率）、71%（腿肉重）和72%（全净膛重）。A study was conducted to assess the relative bioefficacy of DL-Methionine hydroxy analog-Casalt（DL-MHA-Ca） and DL-Met（DLM）.Exponential regression analysis was used to determine biological efficacy based on body weight gain,feed/gain,and carcass responses to dietary Met sources.A total of 792 male Arbor Acres broilers of 7-d-old were allotted into 11 treatments randomly.Each treatment consists of 6 replicates with 12 broilers each.Five graded inclusion levels of DLM and DL-MHA-Ca（0.03%,0.06%,0.10%,0.15%,0.21%） were added to a basal diet that met the nutrient and energy requirements of broiler chicks,with the exception of Met＋Cys.The feeding trial was divided into two phrases： 7～21 d and 22～42 d.The result showed that no matter 7～21 d phrase or 7～42 d phrase,broilers responded significantly（P 0.05） to the Met sources on body weight gain,feed/gain and carcass quality.No significant effect of Met sources was observed on thigh yield,abdominal fat and yield,eviscerated yield（P 0.05）.On equimolar basis,regression analysis revealed that DL-MHA-Ca was 71%（weight gain）,66%（feed/gain） as efficacious as DLM in the period of 7～21 d phrase.In the period of 7～42 d phrase,DL-MHA-Ca was 63%（weight gain）,58%（feed/gain）,74%（carcass weight）,60%（breast weight）,49%（breast yield）,71%（thigh weight）,72%（eviscerated weight） as efficacious as DLM.

关 键 词：DL-蛋氨酸 DL-羟基蛋氨酸钙 生物学效价 肉仔鸡 

分 类 号：S831.5[农业科学—畜牧学]